VARDHAMAN COLLEGE OF ENGINEERING · b) Explain the working of sliding window protocols with a neat...

Hall Ticket No: Question Paper Code: A2604

VARDHAMAN COLLEGE OF ENGINEERING

(AUTONOMOUS) B. Tech V Semester End Semester Regular Examinations, November - 2016

(Regulations: VCE-R14)

MOBILE APPLICATION DEVELOPMENT

(Common to Computer Science and Engineering & Information Technology)

Date: 16 November, 2016 FN Time: 3 hours Max Marks: 75 Answer ONE question from each Unit

All Questions Carry Equal Marks

Unit – I

1. a) What are the features of Android? 5M b) With a neat block diagram explain the architecture of android. 10M 2. a) Describe mobile ecosystem in detail. 10M b) What is mobile 2.0?

5M

Unit – II

3. a) Describe the steps involved in installing Eclipse using ADT (Android development Tools) plug-in.

8M

b) Write the steps involved in installing and configuring the ANDROID SDK Manager?

7M

4. a) Explain the Core Building Blocks in Android. 8M b) Create your own android project which includes the main activity file, manifest file and

xml file? (Ex: Hello World).

7M

Unit – III

5. a) What is a Layout in Android? Describe any 3 Android Layout Types and any 5 Layout Attributes?

8M

b) In Android, you can use “EditText” class to create an editable textbox to accept user input. Show how to create a TextBox in XML file, and demonstrate the use of onClickListener event to display message typed in the textbox.

7M

6. a) Explain the following terms: i. Screen size ii. Screen density iii. Orientation iv. Resolution v. Density- independent pixel

8M

b) Explain how to support multiple screens in android.

7M

Unit – IV

7. a) Write a sample program on Android Alarm Manager. 8M b) Define a Fragment and what are types of fragments? List the methods present in

fragment life cycle.

7M

8. a) Write a program for Adding Fragments Dynamically. 8M b) Write an example program on Android Telephony Manager. 7M

Cont…2

:: 2 ::

Unit – V

9. a) Discuss about session management through shared preferences along with methods involved in it.

8M

b) Write a sample program to send work requests to the Background Service.

7M

10. a) Discuss about HTTP commands used for communication management. 8M b) Write short note on Session management. 7M

Hall Ticket No: Question Paper Code : A2419



(Regulations: VCE-R14) MICROPROCESSORS AND INTERFACING

(Common to Computer Science and Engineering, Information Technology & Electronics and Communication Engineering)



Unit – I

1. a) Explain the register organization of 8086 and give typical application of each register. 8M b) What is memory segmentation? How is it implemented in 8086?

7M

2. a) What are the control flags available in 8086? Mention function of each control flag. 6M b) Explain with a neat block diagram, the signals associated with minimum mode of

operation of 8086.

9M

Unit – II

3. a) Discus the following instructions of 8086 with an example for each: i. LDS ii. SCAS iii. REPE iv. IMUL

8M

b) Write an assembly language program in 8086 to sort five numbers stored in consecutive memory locations starting from location X, in an ascending order.

7M

4. a) Differentiate between inter and intra call procedure in 8086, with a suitable example. 7M b) Write an assembly language program to perform the following:

Main program should check the content of a location ‘X’. If the content of that location is ‘1’, it should call a procedure to add two 8 bit numbers else if ‘X’ contains any other number it should quit the program.

8M

Unit – III

5. a) Design an interface between 8086 CPU and two chips of 8 8k EPROM and two chips of 16 8k RAM. Select suitable starting address of EPROM. The RAM address must start at 00000H.

8M

b) Interface a digital to analog converter (DAC) to 8086, using 8255 and write an assembly language program to generate a square wave of 2 KHz, with 50% duty cycle.

7M

6. a) Interface a stepper motor to 8086, using 8255 and write an assembly language program to rotate the stepper motor in clockwise direction.

8M

b) What is DMA? Why is it needed? Explain how 8086 can be used for DMA operation.

7M

Unit – IV

7. a) Discuss DOS function call and BIOS function call with one example each. 8M b) Explain the architecture of 8259 priority interrupt controller with neat sketch.

7M

8. a) Explain synchronous and asynchronous data transfer schemes. 8M b) Explain RS232 serial data standard. 7M

Cont…2

:: 2 ::

Unit – V 9. a) For each of the following category of 8051 microcontroller instruction set, give two

examples: i. Logical operation ii. Arithmetic operation iii. Branch operation

6M

b) Explain the addressing modes in 8051 with examples.

9M

10. a) Interface a 4*4 matrix key board to 8051 and identify the key closed by storing the key value in a memory location.

10M

b) Name the special function registers and give their configurations which are used for serial data transfer operation in 8051.

5M




(Regulations: VCE-R14) COMPILER DESIGN

(Common to Computer Science and Engineering & Information Technology) Date: 21 November, 2016 FN Time: 3 hours Max Marks: 75

Answer ONE question from each Unit All Questions Carry Equal Marks

Unit – I

1. a) Explain about LEX Tool with an example. 8M b) Explain input buffering strategy used in lexical analysis phase.

7M

2. a) Explain about the recursive descent parsing. 8M b) Check whether the given grammar is LL(1) grammar or not:

S -> 0 A, A -> AB Ɛ, B -> 1

7M

Unit – II

3. a) Explain about types of parsing. 7M b) Construct SLR parsing table for the following grammar:

S’ S S aABe A Abc A b B d

8M

4. a) Explain about Handles in bottom up parsing. 7M b) Construct CLR for the following grammar:

S’ S S CC C cC | d

8M

Unit – III

5. a) Explain about the synthesized attribute by considering the following grammar: S -> En E -> E+T E -> E-T E -> T T -> T * F T -> T/F T -> F F -> (E) F -> digit

8M

b) Explain the dependency graph for the following grammar: S -> T List T -> int T -> float T -> char T -> double List -> List, id List -> id

7M

Cont…2

::2::

6. a) Explain the different forms of intermediate code. 7M b) Write the translation scheme for obtaining the three address code for the following

grammar: S -> id: =E E -> E1 + E2 E -> E1*E2 E -> -E1 E -> (E1) E -> id

8M

Unit – IV

7. a) Explain about the type checking of expression. 7M b) Explain about the structural equivalence of type expressions.

8M

8. a) Explain about activation record for factorial program. 7M b) Give the structure of storage allocation for data variables.

8M

Unit – V

9. a) Describe the principles for sources of optimizations of code. 7M b) Consider the following program code for computing dot product of two vectors a and b

of length 10. Write the three address code for this and partition it into basic blocks.

prod = 0;

i = 1;

do

prod = prod + a[i] * b[i];

i = i +1;

while (i <= 10);

8M

10. a) Explain about the register allocation and assignment in code generation phase. 10M b) Compute the cost of the following set of instructions:

MOV a, R0 ADD b, R0 MOV R0, c

5M





COMPUTER NETWORKS




Unit – I

1. a) Name seven layers of OSI model and explain two important functions offered by each layer.

10M

b) What are the three major classes of guided media? List the salient features of each of the guided media.

5M

2. a) Why does a datagram network need only end to end address? Explain with a schematic of a network.

7M

b) Design a three stage switch with cross bars of size n*k and show that total number of cross points are less than that of single stage switch.

8M

Unit – II

3. a) State and explain the design issues for data link layer. 8M b) Explain the working of sliding window protocols with a neat diagram.

7M

4. a) What is HDLC? Explain different frame formats with control field used by HDLC. 10M b) Explain stop-and –wait ARQ protocol with suitable timing diagram.

5M

Unit – III

5. a) Explain leaky bucket congestion control algorithm. 7M b) Find the class of the address of each of the following:

i. 125.05.13.8 ii. 225.06.13.8 iii. 14.23.120.5 iv. 220.06.120.5

8M

6. a) What is NAT? Explain how address translation is done in NAT. 8M b) Bring any three differences between IPv4 and IPv6 addressing schemes.

7M

Unit – IV

7. a) How is TCP better than UDP? Explain services offered by TCP. 8M b) What are the QOS parameters used in TCP? Explain.

7M

8. a) How is flow control implemented using TCP in Transport layer? Explain. 7M b) Name the SCTP services and its advantages.

8M

Unit – V 9. a) Write in brief about DNS Name Space. 5M b) Explain about the following:

i. Resource Records ii. Name Servers

10M

10. a) Explain in brief about Dynamic Web Document and HTTP. 8M b) Explain in brief about File Transfer Protocol (FTP) with a neat block diagram. 7M





WEB TECHNOLOGIES




Unit – I

1. a) Explain about List and Table properties of HTML with an example. 8M b) Design a signup form that accepts First Name, Last Name, email address and Password.

Also mention the cascading styles used for the look and feel.

7M

2. a) What are the variable naming conventions in JavaScript? Write a JavaScript program to create a confirmation dialog box.

8M

b) Write a Java script program to sort numbers (alphabetically and numerically) Sample Input: 40,100,1,5,25,10 Sorted Alphabetically: 1,10,100,25,40,5 Sorted Numerically: 1,5,10,25,40,100

7M

Unit – II

3. a) What is an XML parser? Explain about various types of XML parsers and the terminology used for describing the structure of XML document.

7M

b) How XML documents are validated using a Document Type Definition file?

8M

4. a) Create a sample XML file for maintaining library information. 5M b) How is XSLT different from CSS? Create an XSLT sheet for converting a given XML file into

a HTML file.

10M

Unit – III

5. a) Explain how the methods of DriverManger Class and Connection Interface are useful in establishing database connectivity in java.

8M

b) What are the advantages of java beans? Explain about the Bound properties of java bean.

7M

6. a) Explain the methods of a generic servlet with a simple example. 7M b) Write a servlet program to set and read the cookies on any web browser.

8M

Unit – IV

7. a) Explain about <jsp: include> Action with an example. 7M b) Explain about different JSP actions. Also explain about ID attribute and Scope Attribute.

8M

8. a) Explain the life Cycle of JSP. Write a simple JSP program to accept the name of the user and display the name in different JSP pages.

8M

b) Write a JSP program to read username, password, firstname, lastname and email of a person and store it in the database.

7M

Unit – V

9. a) Validate login details using PHP based on database connectivity. 8M b) Explain the usage of multi dimensional arrays in PHP.

7M

10. a) What is AJAX? With a simple program explain the working of AJAX. 7M b) List various control structures in PHP. Write a PHP program to find prime numbers in

between 1 to 100. 8M





PRINCIPLES OF PROGRAMMING LANGUAGES

(Computer Science and Engineering)

Date: 29 November, 2016 Time: 3 hours Max Marks: 75 Answer ONE question from each Unit


Unit – I

1. a) Explain benefits of studying programming languages. 12M b) What are the pragmatics of programming languages?

3M

2. a) Mention the features of attribute grammar. 6M b) i. Draw a parse tree for the following statement: A = B * (A + C)

ii. Explain ambiguous grammar with suitable example

9M

Unit – II

3. a) Explain about various primitive data types. 8M b) Explain about type checking.

7M

4. a) Write short notes on Associative arrays. 8M b) Differentiate between Union and Structure.

7M

Unit – III

5. a) Discuss the design issues of Assignment statements, Unconditional statements and Guarded commands.

8M

b) Write short notes on Generic subprograms.

7M

6. a) What are the design issues for functions? 8M b) Explain about the scope and life time of a variable.

7M

Unit – IV

7. a) When do you say two processes are in deadlock state? Mention the conditions at which deadlock can occur.

10M

b) Describe the concept of Synchronous Message Passing.

5M

8. a) Explain super and final keywords used in Java with an example. 6M b) What is semaphore? Explain the three operations of abstract type semaphore. How

do you create Java threads?

9M

Unit – V

9. a) Give the general form of exception handlers in C++. Explain each of the exception handler in detail with an example.

12M

b) What are the three characteristics of Haskell that make it different from ML?

3M

10. a) Explain first LISP interpreter. Give its internal representation two LISP lists. 8M b) Why can concurrency be easier with functional languages than imperative languages? 7M





WIRELESS AND MOBILE COMPUTING

(Information Technology)



Unit – I

1. a) Describe the protocol architecture of WLAN with neat diagram. 9M b) Discuss about the MAC frames in detail.

6M

2. a) With a focus on security, what are the problems of WLANs? What level of security can WLANs provide, what is needed additionally and how far the standards go?

8M

b) Explain the Phases of HIPERLAN with neat diagram.

7M

Unit – II

3. a) What Multiplexing schemes are used in GSM and what purpose Think of layers apart from the physical layer.

7M

b) How is localization, location update, roaming, etc. done and reflected in the databases?

8M

4. a) Recall the problem of hidden and exposed terminals. What happens in the case of such terminals if Aloha, slotted Aloha, reservation Aloha, or MACA is used?

8M

b) Assume all stations can hear all other stations .One station wants to transmit and senses the carrier idle. Why can a collision still occur after the start of transmission?

7M

Unit – III

5. a) Discuss two different ways of mobile node registration along with the packet formats used for registration request and reply.

10M

b) Write a short note on Indirect –TCP.

5M

6. a) Explain basic architecture of cellular IP with neat diagram. 7M b) Explain dynamic source routing protocol and its different phases.

8M

Unit – IV

7. a) Describe the pull-based data delivery mechanism. What are the advantages and disadvantages of this mechanism?

8M

b) Describe the online bucket scheduling algorithms the broadcast of data having various subscriptions probabilities and lengths.

7M

8. a) What are the advantages of hoarding data at the mobile device? 5M b) Discuss about Context-aware computing ?What are the different context types used in

Context-aware computing. 10M

Unit – V

9. a) Explain WAP and the protocol architecture of WAP in detail. 9M b) Discuss the important features of Wireless Telephony Application (WTA).

6M

10. a) Explain security in Bluetooth with neat diagram. 10M b) Explain features of WAP 2.0. 5M





OBJECT ORIENTED PROGRAMMING THROUGH JAVA

(Common to Electronics and Communication Engineering & Electrical and Electronics Engineering)

Date: 16 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) What are the differences between instance method and static method? 6M b) Describe with a flowchart, how various Java tools are used in the application

development.

9M

2. a) What is Java Virtual Machine and how it is considered in context of Java’s platform independent feature?

6M

b) Write a program to read the price of an item in decimal form (like 35.45) and print the output in paise (like 3545 paise).

9M

Unit – II

3. a) Demonstrate with a program how overridden method is resolved at runtime. 7M b) Interfaces can be used to support multiple inheritance. Justify your answer with an

example.

8M

4. a) A Deemed University awards some grace marks to students who participate in the national games. Therefore, total marks awarded = Exam_Marks + Sports_Grace_Marks. If total marks scored are greater than maximum marks then the final marks awarded will be equal to the maximum marks. An OO based implementation will contain a class called Results, which extends a class called Exam which itself extends a class called student it will also contain an interface called sports which is implemented by the Results class. The Results class will be responsible for computing the final marks scored by the students. Write a Java program along with an interactive driver class.

10M

b) Develop a simple program that searches for all the files with user-defined name.

5M

Unit – III

5. a) Consider that the base class Stack is available. It does not take care of situations such as overflow or underflow. Create a new derived class called MyStack which extends Stack class and raises an exception whenever overflow or underflow occurs.

10M

b) Explain how are exception handled in java? Give an example.

5M

6. a) Define threads? Briefly explain the differences between a thread and a process. 5M b) Explain Producer/Consumer Problem and obtain an solution to solve the

Producer/Consumer problem using threads.

10M

Unit – IV

7. a) Java includes an elegant interprocess communication mechanism in order to avoid polling. Explain.

8M

b) Write a program to create multiple threads in java.

7M

Cont…2

::2:: 8. a) Write short notes on the following:

i. Container ii. Window iii. Panel iv. Frame

8M

b) Create a frame window by instantiating frame class.

7M

Unit – V

9. a) Write a program that handles the event generated by a swing push button. 10M b) Develop a program to illustrate how to create and use a simple table containing 3

columns and 10 rows for 10 employees with the following attributes empid, name and designation.

5M

10. a) Write a program that uses two buttons to control the size of a circle: i. Enlarge ii. Shrink The user clicks the Enlarge and Shrink buttons to enlarge and shrink the size of the circle.

10M

b) Develop a applet that sets the foreground and background colors and outputs a string. 5M





INTEGRATED CIRCUITS APPLICATIONS

(Common to Electronics and Communication Engineering & Electrical and Electronics Engineering)



Unit – I

1. a) Mention the Ideal Characteristics of Op-Amp. 8M b) What is the Voltage at point A and B for the circuit shown in Fig.1 if V1=6 V and V2=7 V

Assuming that Op-Amps are Ideal

Fig.1

7M

2. a) Explain the following: i. Input offset voltage ii. Total output offset voltage iii. Thermal drift

9M

b) For the non-inverting amplifier shown in the Fig.2. below, R1=1KΩ and Rf=10KΩ. Calculate the maximum output offset voltage due to VOS and IB. The Op-amp is LM 307 with VOS=10mV, IB=300nA and IOS=50nA. Also calculate the value of R Comp needed to reduce the effect of IB and maximum output offset voltage with R Comp connected in the circuit.

Fig.2

6M

Unit – II

3. a) Derive the expression for closed loop voltage gain of an ideal and practical Non-inverting amplifier.

9M

b) For the integrator shown in the Fig.3 below, if R1=10KΩ, Rf=100KΩ, Cf=10nF, determine the lower frequency limit of integration and obtain the response for a sine wave input of 1V peak at 5KHz, a square wave input of 1V peak at 5KHz.

Fig.3

6M

Cont…2

:: 2 ::

4. a) Derive the expression for output frequency of a wein-bridge oscillator with a suitable circuit using Op-amp. Mention its drawback and how it is overcome using Practical wein-bridge oscillator with adaptive negative feedback.

9M

b) For the circuit of a Schmitt trigger shown in the Fig.4. below, R2=100Ω, R1=50KΩ, Vref=0V, Saturation voltage = + 14V. Determine the threshold voltages VUT and VLT for a sinusoidal input voltage of 1VPP (Peak to Peak).

Fig.4

6M

Unit – III

5. a) Explain the operation of IC723. 7M b) Design a wide band pass filter using Op-Amp with fl =300Hz, fh =3 KHz and a Pass Band

Gain of 4 and Calculate value of Q for this Filter.

8M

6. a) Draw the circuit Diagram for First order High Pass Filter and derive the expression for the transfer function.

8M

b) Design a Second Order Butterworth Low Pass Filter having upper Cut off Frequency 1KHz.

7M

Unit – IV

7. a) With a neat circuit diagram and relevant wave forms, explain the astable operation of 555 timer and derive the expressions for output frequency and percentage duty cycle.

8M

b) Explain the application of 555 timer in mono-stable mode as missing pulse detector.

7M

8. a) Derive the expression for Capture range of a PLL. 8M b) Explain the application of a PLL as a Frequency Translator.

7M

Unit – V

9. a) Explain the following DAC/ADC specifications: i. Resolution ii. Linearity iii. Accuracy

9M

b) What output voltage would be produced by D/A convertor whose output range is 0 to 10V and whose input binary number is: i. 0110 ( for a 4 bit DAC) ii. 10111100 (for a 8 bit DAC)

6M

10. a) With a neat diagram, Explain the operation of a Weighted Resistor DAC and mention its drawback.

8M

b) With a neat diagram, Explain the operation of Counter type ADC. 7M





DIGITAL DESIGN THROUGH VERILOG HDL

(Electronics and Communication Engineering)



Unit – I

1. a) Explain about the operators in verilog. Explain the operator precedence in Arithmetic operators.

7M

b) What is parameter? How to change the values of a parameter in verilog?

8M

2. a) What are the compiler directives available in Verilog? Explain with examples. 7M b) How the structural and behavioral constructs can be mixed freely to design a mixed

mode design style? Explain with suitable example.

8M

Unit – II

3. a) Describe the following relevant to gate level modeling with necessary syntax and example: i. Gate delays ii. Array of Instances

8M

b) Write a gate level modeling of a JK flip-flop with test bench, simulation results and synthesized circuit.

7M

4. a) Design a full adder only using half adder modules and an OR gate. Write a Verilog code using gate level modeling along with test bench.

8M

b) Design an 8 X 1 multiplexer using 4 X 1 multiplexers and implement the gate level description of the above design along with test bench.

7M

Unit – III

5. a) Design a 4-bit up/down counter and write a behavioral level description along with a test bench and simulation results.

8M

b) Explain the various kinds of loop statements with necessary syntax and example.

7M

6. a) Describe the procedural continuous assignment feature of Verilog HDL with suitable example.

8M

b) Write an AND-OR-INVERT gate module at behavioral level along with test bench.

7M

Unit – IV

7. a) Design a logic circuit to detect prime numbers of a 4-bit input data. Write data flow level description and test bench for the above design.

9M

b) Design a 4-bit switcher module at the data flow level. Write a test bench to verify the design.

6M

8. a) Explain various resistive switch level primitives and give their instantiations. Draw the CMOS 2-input NOR gate and write its Verilog HDL source code using switch level modeling.

9M

b) Discuss how delays can be introduced with switch primitives with an example. 6M

Cont…2

:: 2 ::

Unit – V

9. a) Design a one’s counter which can count number of ones in a given 8-bit data. Write RTL description using task.

7M

b) Discuss file based tasks and functions. Write a combinational UDP for 2 input NOR gate.

8M

10. a) What is a State machine? Differentiate Moore and Mealy Machines. 5M b) Design a Moore machine for a sequence generator to sequence through eight

distinct states. The states are represented by a set of four binary variables—W, X, Y, Z. The states and sequence are as follows (the four bits represent values of W, X, Y and Z respectively): 1000 1100 0100 0110 0010 0011 0001 10011000--- Write a Verilog HDL source code and test bench to verify the state machine.

10M





DIGITAL COMMUNICATIONS

(Electronics and Communication Engineering)



Unit – I

1. a) Explain the working of PCM transmitter with a neat block diagram. 9M b) A television signal with a bandwidth of 4.2MHz is transmitted using binary PCM

stems. Given that the number of quantization levels is 512. Determine: i. Codeword length ii. Transmission bandwidth iii. Final bit rate iv. Output signal to quantization noise ratio

6M

2. a) What is the slope overload distortion and granular noise in delta modulation? How it is removed in Adaptive delta modulation (ADM)?

9M

b) Write short notes on transmission noise in PCM system.

6M

Unit – II

3. a) Determine the amount of probability of error in FSK Receiver. 7M b) Encode the data input stream 101100011110 using DPSK modulator. What are the

advantages of DPSK over PSK.

8M

4. a) Derive an expression for error probability of non-coherent FSK signaling scheme. 7M b) Binary data is transmitted over a telephone line with useable bandwidth of 2400HZ ,

using the FSK signaling scheme. The transmit frequencies are 2025Hz , 2225Hz and the data rate is 300 /bits sec . The average signal-to-noise power ratio at the output of the channel is 6dB. Calculate the probability of error for coherent and no-coherent de modulation scheme.

8M

Unit – III

5. a) State and explain properties of Entrophy. 8M b) Apply ShannonsFano encoding algorithm construct a binary code and determine code

efficiency and redundancy for:

Messages M1 M2 M3 M4 M5 M6 Probability 0..4 0.2 0.2 0.1 0.07 0.03

7M

6. a) Define information, entropy, Information rate, joint and Conditional entropies. Prove that , /H X Y H Y H X Y

8M

b) Consider a telegraph source having two symbols, dot and dash. The dot duration is 0.2s. The dash duration is 3times the dot duration. The probability of the dot’s occurring is twice that of the dash, and the time between symbols is 0.2s. Calculate the information rate of the telegraph source.

7M

Cont….2

::2::

Unit – IV

7. a) A (7,4) block code is generated by using a generator matrix:

1 0 0 0 : 1 1 10 1 0 0 : 1 1 00 0 1 0 : 1 0 10 0 0 1 : 0 1 1

Find the following: i. Parity check matrix ii. Code vectors for a message block (1001) and (1110) iii. Show how a single error can be corrected

9M

b) The generator polynomial of a (6,3) cyclic code is 21g x x . Find all the code words.

6M

8.

a) The parity check matrix of a linear block code is 1 0 1 1 0 00 1 1 0 1 01 1 0 0 0 1

H

. Determine the

generator matrix and find all the codewords.

6M

b) The generator polynomial of a (7,4) systematic cyclic code is 31g x x x . Find the code words for the messages (1110), (1001) using shift register method.

9M

Unit – V

9. a) Explain the use of trellis diagram for viterbi decoding with an example. 7M b) Sketch the state diagram and tree diagram for the given convolutional encoder:

Fig.1

8M

10. a) Write short notes on maximum likelihood decoding of convolutional codes. 6M b) For the convolutional encoder with 1 100g , 2 111g and 3 101g draw the state

diagram and output code word in transform domain approach for message 0 .1010u

9M




(Regulations: VCE-R14) ANTENNAS AND WAVE PROPAGATION (Electronics and Communication Engineering)



Unit – I

1. a) Derive the near field and far field for E field component of short electric dipole and derive the point at which near field is equal to far field.

7M

b) Derive Radiation resistance of Half wave dipole antenna with centre fed is 73ohms.

8M

2. a) Derive the effective length of antenna for Sinusoidal and Linear Current Distributions. 6M b) Write short notes on:

i. Antenna Effective aperture ii. Scattering Aperture iii. Antenna Efficiency iv. Physical Aperture

9M

Unit – II

3. a) State the Pattern Multiplication theorem. Apply the multiplication pattern on 8 element array and draw the radiation pattern.

6M

b) Explain the working mechanism and applications of Binomial array with diagrams. Highlight the advantages of Binomial array over conventional array. Explain the importance of tapering.

9M

4. a) Obtain the radiation pattern of 4-isotropic elements fed in phase, spaced 휆/2 apart using principle of multiplication of patterns.

8M

b) Calculate the voltage induced in a loop antenna of 1m2 of 10 turns, with its plane 450 off the line of bearing a distant station, due to an incident magnetic field of strength of 10-7wb/m2 at a wavelength of 1000m.

7M

Unit – III

5. a) Explain the construction of Helical antenna with neat diagrams and derive the pitch angle of helical antenna.

7M

b) Derive the axial ratio of Helical antenna in normal mode of radiation. Mention the applications of Helical antenna.

8M

6. a) Explain in detail the advantages and disadvantages of Rhombic antenna. 8M b) Explain the operation of V antenna in detail.

7M

Unit – IV

7. a) Describe the principle and construction of E-plane metal plate lens antenna and mention its applications.

8M

b) Explain why microstrip antennas are also called as low profile antennas and mention its types and applications.

7M

Cont…2

:: 2 ::

8. a) Write short notes on: i. Horn antenna ii. Lens antenna

8M

b) A parabolic antenna having a circular mouth is to have a power gain of 1000 at λ=10cm.Estimate the diameter of the mouth and the HPBW of the antenna.

7M

Unit – V

9. a) Discuss the theory of formation ionospheric regions. Describe the properties of different ionospheric regions.

8M

b) Calculate the value of the factor by which the horizon distance of a transmitter will be modified, if the gradient of refractive index of air near the ground is -0.5x10-6 m-1.The radius of the earth is given to be 6370km.

7M

10. a) Derive the field strength of tropospheric wave. 8M b) Calculate the value of frequency at which an electromagnetic wave must be

propagated through the D-region with an index of refraction of 0.5 and an electron density of 3.24x104 electrons/m3. Derive any formulae used.

7M





COMPUTER ARCHITECTURE AND ORGANIZATION

(Electrical and Electronics Engineering)



Unit – I

1. a) Represent the following decimal values as signed 7 bit number using sign magnitude. signed 1’s complement and signed 2’s complement formats. i. -39 ii. +43 iii. -27 iv. 62

6M

b) Explain about three state bus along with memory operations.

9M 2. a) Design the circuits for 4 bit binary adder, 4 bit adder-substarctor, 4 bit binary

incrementor. 6M

b) Describe single bus organization of a computer system and show the connections between processor and memory. Write the functionality of MAR and MDR.

9M

Unit – II

3. a) What are the phases of an Instruction cycle? Explain each phase. 7M b) What are the two instructions needed in the basic computer in order to set IEN-Flip-

flop to 1?

8M

4. a) What is the difference between a direct and an Indirect address instruction? How many references to memory are needed for each type of instruction to bring an operand into a processor register?

7M

b) Draw and explain the control gates associated with the address register AR in the basic computer.

8M

Unit – III

5. a) Define the following: i. Micro operation ii. Micro instruction iii. Micro program iv. Micro code

7M

b) Explain the flow chart Addition and Subtraction of Floating point numbers.

8M

6. a) Explain how the mapping from an instruction code to a micro instruction address can be done of a read only memory. What is the advantage of this method?

7M

b) Explain the Booth’s algorithm for Multiplication of signed 2’s complement numbers.

8M

Unit – IV

7. a) A computer system using the relatively simple CPU is to include a 1k associative cache with a line size of 2 bytes: i. How many bits are in each location of the cache ii. What mask value is needed for the associative memory

8M

b) Explain about Magnetic Disks and Magnetic Tapes.

7M

8. a) What is a Memory Address Map? Draw a neat diagram for Typical 512x8 ROM chip. 8M b) Differentiate Cache memory and Virtual memory. 7M

Cont…2

:: 2 ::

Unit – V

9. a) Discuss the differences between tightly coupled multiprocessors and loosely coupled multiprocessors from the view point of hardware organization and programming techniques.

7M

b) How many switch points are there in a cross switch network that connects ‘p’ processors to ‘m’ memory modules?

8M

10. a) Draw a logic diagram using gates and flip-flops showing the circuit of one bus arbiter stage in Daisy chain Arbitration scheme.

7M

b) Explain how the system can be designed to distinguish between references to local memory and references to common shared memory.

8M




(Regulations: VCE-R14) POWER SYSTEM TRANSMISSION (Electrical and Electronics Engineering)



Unit – I

1. a) Deduce an expression for the inductance per phase of a three phase overhead transmission line when the conductors are symmetrically spaced.

7M

b) Fig.1 shows the spacing of a double circuit three phase overhead line. The phase sequence is ABC and the line is completely transposed. The conductor radius is 1.3cm. Find the inductance per phase per km.

Fig.1

8M

2. a) Derive an expression for line to neutral capacitance of a three phase overhead transmission line when the conductors are unsymmetrically spaced and regularly transposed.

8M

b) Calculate the capacitance of a 100km long three phase, 50Hz overhead transmission line consisting of 3 conductors, each of diameter 2cm and spaced 2.5m at the corners of an equilateral triangle.

7M

Unit – II

3. a) Using rigorous solution derive an expression for sending end voltage and current of a long transmission line.

8M

b) Estimate the distance over which a load of 15,000KW at a p.f. of 0.8 lagging can be delivered by a three phase transmission line having conductors each of resistance 1 ohm/km. The voltage at the receiving end is to be 132kV and the loss in the transmission line is to be 5%.

7M

4. a) Evaluate the generalized circuit constants for a medium transmission line by Nominal–π method.

7M

b) A three phase, 50Hz transmission line, 100km long delivers 20MW at 0.9 p.f. lagging and at 110kV. The resistance and reactance of the line per phase per km are 0.2 ohm and 0.4 ohm respectively, while the capacitive admittance is 2.5x10-6siemen/phase/km. Calculate: i. The current and voltage at the sending end ii. Efficiency of transmission. Use Nominal T method

8M

Cont…2

:: 2 ::

Unit – III

5. a) Explain clearly the Ferranti effect with phasor diagram. 7M b) A 3-phase, 220KV, 50Hz transmission line consists of 1.5cm radius conductor spaced

2meters apart in equilateral triangular formation. If the temperature is 400C and atmospheric pressure is 76cm, calculate the corona loss per km of the line. Take m0=0.85.

8M

6. a) Derive expressions for Sag and tension in a power conductor string between two supports at equal heights taking into account the wind and also ice loadings.

7M

b) An overhead transmission line at a river crossing is supported from two towers at heights of 40meters and 90meters above water level, the horizontal distance between the towers being 400meters. If the maximum allowable tension is 2000Kg, find the clearance between the Conductor and water at a point mid-way between the towers. Weight of the conductor is 1Kg/m.

8M

Unit – IV

7. a) Explain the different methods of improving string efficiency. 7M b) An insulator string has 3 units each having a safe working voltage of 15kV.The ratio of

self capacitance to stray capacitance to earth is 10:1.Compute the safe working voltage of the string and the string efficiency.

8M

8. a) Derive the expression for insulation resistance of a single core ungraded cable. 7M b) A single core cable is graded by using three dielectrics of relative permittivity of 5, 4 and

3 respectively. The conductor diameter is 2cm, overall diameter is 8cm.If the three dielectrics are worked at same stress of 40kV/cm, find the safe working voltage of the cable.

8M

Unit – V

9. a) Explain the following: i. Radial distribution system ii. Ring main distribution system

8M

b) A two wire DC distributor AB is fed from both ends. At feeding point A, the voltage is maintained at 230volts and 235volts at point B. The total length of the distributor is 200 meters and loads are tapped off as under: 25 amps at 50 m from A 50 amps at 75 m from A 30 amps at 100 m from A 40 amps at 150 m from A The resistance per Km of one conductor is 0.3 ohms. Calculate: i. Currents in various sections of the distributor ii. Minimum voltage point at which it occurs and minimum voltage

7M

10. a) Describe briefly the different types of d.c. distributors. 7M b) A single phase a.c. distributor AB 300meters long is fed from end A and is loaded as

under: i. 100A at 0.707 p.f. lagging 200m from point A ii. 200A at 0.8 p.f lagging 300m from point A The load resistance and reactance of the distributor is 0.2Ω and 0.1Ω per kilometer. Calculate the total voltage drop in the distributor. The load power factors refer to the voltage at far end.

8M




(Regulations: VCE-R14) POWER SYSTEM DISTRIBUTION

(Electrical and Electronics Engineering) Date: 25 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) Explain the following in detail: i. Coincidence factor ii. Contribution factor

8M

b) The average load factor of a substation is 0.65. Determine the average loss factor of its feeders, if the substation services: i. Urban area ii. Rural area

7M

2. a) Explain how load growth in distribution system can be determined and estimated. 8M b) What is a load curve and load duration curve? Explain their importance in distribution

networks?

7M

Unit – II

3. a) Give various loading and voltage level factors that influence the design and operation of primary feeder.

8M

b) Explain the best design practices adopted for secondary distribution system.

7M

4. a) Derive an expression for calculating the percentage voltage contributions by taking n feeders for a given load density.

8M

b) Explain benefits derived through the optimal location of substation.

7M

Unit – III

5. a) Derive an approximate voltage-drop equation of primary feeder and give the condition for load power factor at which voltage drop is maximum.

7M

b) Prove the power loss due to the load currents in the conductors of single phase lateral ungrounded neutral case is 2 times large than one in the equivalent three phase lateral.

8M

6. a) Determine the Voltage Drop and Power Loss in a single phase two wire lateral with unigrounded neutral system.

7M

b) Determine the voltage drop and power loss in single phase two wire lateral with multigrounded common neutral.

8M

Unit – IV

7. a) Explain the general coordination procedure adopted for the protection of Distribution System.

8M

b) Explain the coordination between Recloser to Recloser for the protection of Distribution System.

7M

8. a) What are the main objectives of distribution protection? 8M b) Explain the principle of operation of circuit reclosures. 7M

Cont…2

:: 2 ::

Unit – V

9. a) What are the reasons for low power factor? With shunt capacitor How do you overcome the problems?

7M

b) Explain the procedure to determine the best capacitor allocation in distribution system.

8M

10. a) What are the various equipments used for the voltage control? What is the effect of series capacitor?

7M

b) How an automatic voltage booster used to improve the voltage profile? 8M





ELECTRICAL MEASUREMENTS AND INSTRUMENTATION

(Electrical and Electronics Engineering)

Date: 29 November, 2016 Time: 3 hours Max Marks: 75 Answer ONE question from each Unit


Unit – I

1. a) Describe the constructional details and working of a single phase electrodynamometer type power factor meter.

8M

b) Derive the expression for the torque of a Moving iron instrument.

7M

2. a) Show that in a 3-ph electrodynamometer power factor meter the angular deflection of pointer from the plane of reference is equal to the phase angle of the circuit to which the meter is connected.

9M

b) Derive the expressions for ratio error and phase angle error of a current transformer.

6M

Unit – II

3. a) Describe the errors in electrodynamometer type wattmeter. 6M b) Prove that the true power is read accurately in the absence of inductance by deriving

an expression for electrodynamometer wattmeter at all power factors and frequencies.

9M

4. a) Explain the construction and working of a single phase induction type energy meter. 8M b) An energy meter is designed to make 100 revolutions of disc for one unit of energy.

Calculate the number of revolutions made by it when connected to load carrying 40A at 230v and 0.4 power factor for an hour. If it actually makes 390 revolutions, find the percentage error.

7M

Unit – III

5. a) What is meant by standardization? Explain about basic slide wire potentiometer with neat circuit diagram.

8M

b) Explain the process of calibration of Ammeter and Voltmeter using DC potentiometer.

7M

6. a) Explain the principle and operation of a frequency selective wave analyzer. 8M b) A coil of resistance 10ohms is connected in the Q meter circuit. Resonance occurs at a

frequency of 1MHz with the tuning capacitor set at 65Pico farads calculate the percentage error introduced in the calculation of Q if a resistance of 0.02ohms is used across the oscillator circuit.

7M

Unit – IV

7. a) The four impedances of an a.c. bridge are Zab=400/_50 Ohms, Zad=200/_40 Ohms, Zbc=800/_-50 Ohm, Zcd=400/_20 Ohms. If the detector is connected between b and d and supply is connected between a and c, indicate if the bridge is balanced.

6M

b) Draw the circuit of a kelvins’ double bridge used for measurement of low resistance. Derive the condition for balance.

9M

8. a) What are the different difficulties encountered in the measurement of low resistance using wheat stone bridge? Explain how these difficulties are overcome?

7M

b) Explain the construction and working of an Anderson bridge with the help of phasor diagrams.

8M

Cont…2

:: 2 ::

Unit – V

9. a) Describe the different criteria for selection of transducer for a particular application. 7M b) Explain with diagram, the bounded and unbounded type of strain gauges.

8M

10. a) Explain how trasnducers are classified based on principle of operation. 6M b) What are the advantages and disadvantages of capacitive transducers and what are its

uses? 9M



(AUTONOMOUS) B. Tech V Semester Regular Examinations, November - 2016


MANAGEMENT SCIENCE (Mechanical Engineering)

Date: 16 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) Explain any eight Fayol’s principles of management. 8M b) ‘Elton Mayo’s has conducted an experiment in the Hawthorne plant of Western Electric

Company regarding evaluating the attitudes and psychological reactions of workers’- Discuss.

7M

2. a) Explain Maslow’s hierarchy of needs with a diagrammatic representation. 6M b) What is a Matrix organization? Explain its advantages and limitations with a diagram.

9M

Unit – II

3. a) What are the factors governing in selecting a plant location? Discuss. 9M b) What are the principles of plant layout? Explain.

6M

4. a) Explain the following methods of production with their limitations and a diagram: i. Job production ii. Batch production iii. Mass production

9M

b) What are the principles of method study?

6M

Unit – III

5. a) What are the objectives of X Chart and C chart? 7M b) A Television company uses 25,000 PCB’s per year each costing Rs.1,000. It costs Rs.200

for placing an order and the inventory cost is Rs.100 per unit per year: i. How many PCB’s should be ordered at a time for maximum economy? ii. How many orders should be placed per year? iii. What is the duration between each order?

8M

6. a) What is meant by Economic order quantity? Discuss the concept and utility of ABC analysis as applied to inventory control.

7M

b) What is acceptance sampling? Discuss the characteristics of single sampling plan with double sampling plan.

8M

Unit – IV

7. a) Define manpower planning? Describe the strategies involved in manpower planning process.

9M

b) Explain briefly any three methods of on-job training in a manufacturing concern.

6M

8. a) Define merit rating. Explain any two methods of determining the merit of an employee. 7M b) ”Is recruitment different from selection process”–Substantiate the above statement with

reference to automotive sector. 8M

Cont…2

:: 2 ::

Unit – V

9. a) Explain rules for drawing network diagram. 5M b) The following table lists all the 10 activities that provide a small project –together with

their immediate predecessor activity and the estimated time required for each activity:

Activity Time in days Immediate predecessors A 7 - B 5 - C 12 - D 4 A E 8 B F 15 B G 7 C H 3 G I 14 D,E J 6 F,H

i. Draw the network diagram ii. Determine the earliest start, earliest finish, latest start and latest finish time and

the total slack of each activity

10M

10. a) Write short notes on the following: i. Total float ii. Free float

5M

b) The data on normal time, cost, crash time and cost associated with a project are shown in the following table:

Activity Normal Crash Time(weeks) Cost(Rs) Time(weeks) Cost(Rs)

1-2 3 300 2 400 2-3 3 30 3 30 2-4 7 420 5 580 2-5 9 720 7 810 3-5 5 250 4 300 4-5 0 0 0 0 5-6 6 320 4 410 6-7 4 400 3 470 6-8 13 780 10 900 7-8 10 1000 9 1200

Indirect cost is Rs.50 per week. i. Draw the network diagram for the project and identify the critical path ii. What are the normal project duration and associated cost iii. Crash the relevant activities and determine the optimal project completion time

and cost

10M





DYNAMICS OF MACHINERY

(Mechanical Engineering)



Unit – I

1. a) The mass of the motor cycle along with the rider is 180kg. The height of the centre of gravity of total mass is 60cm above the ground when it moves straight. Each wheel has diameter equal to 70cm and moment of inertia of each wheel is 2kgm2. The engine rotates at a speed 5 times the wheel and engine rotating parts have moment of inertia equal to 0.2kgm2. determine the angle of heel required if motor cycle negotiates a curve of radius 100m at a speed of 108km/hr.

6M

b) The motor of a marine having a mass of 1000kg and radius of gyration 300mm rotates at 1550rpm clockwise when looking from bow. Determine the gyroscopic couple and its effect on the ship in the following cases: i. When the ship pitches with an angular velocity of 1rad/sec when the bow Rising ii. When the ship is speeding at 40km/hr and takes a right turn in a circular path of

200m radius iii. When the ship rolls at certain instant, it has an angular velocity of 0.5 rad/sec when

viewed from the stern.

9M

2. a) Find expression for the screw efficiency of a square thread. 7M b) In a thrust bearing the external and internal radii of the contact surfaces are 210mm and

160mm respectively. The total axial load is 60kN and coefficient of friction is 0.05. The shaft is rotating at 380rpm. Intensity of pressure is not to exceed 350kN/m2. Calculate: i. Power lost in overcoming the friction using uniform pressure theory ii. Number of collars required for the thrust bearing

8M

Unit – II

3. a) With a neat sketch explain the working of Multiplate clutch. 8M b) A single plate clutch with both sides effective, has outer and inner diameters 300mm and

200mm respectively. The maximum intensity of pressure at any point in the contact surface is not to exceed 0.1N/mm2. If the coefficient of friction is 0.3, determine the power transmitted by a clutch at a speed 2500r.p.m. Assume uniform wear.

7M

4. a) What is the function of dynamometer? Describe the operation of any one dynamometer. 7M b) The brake drum of a single block brake is rotating at 500r.p.m. in the clockwise direction.

The diameter of the drum is 400mm and the single block brake is of the type as shown in Fig.1. The force required at the end of the lever to apply the brake is 300N. If angle of contact is 30o and L = 1 m, a = 300mm and b = 25mm then determine the braking torque. The coefficient of friction is equal to 0.3:

Fig.1

8M

:: 2 ::

Unit – III

5. a) Define the terms: i. Coefficient of fluctuation of energy and ii. Coefficient of fluctuation of speed related to the flywheels.

4M

b) A multi-cylinder engine is to run at a speed of 600r.p.m. On drawing the turning moment diagram to a scale of 1mm = 250N-m and 1mm = 30,the areas above and below the mean torque line are : +160,-172,+168,-191,+197, -162. The speed is to be kept within + 1% of the mean speed of the engine. Calculate the necessary moment of inertia of the flywheel. Determine the suitable dimensions of a rectangular flywheel rim if the breadth is twice its thickness. The density of the cast iron is 7250kg/m3 and its hoop stress is 6MPa. Assume that the rim contributes 92 % of the flywheel effect.

11M

6. In a spring loaded governor of the Hartnell type, the weight of each ball is 50 N and sleeve lift is 50 mm. The governor begins to float at 240 rpm when its radius is 11 cm. The mean speed of the governor is 20 times the range of speed when friction is neglected. The lengths of ball and roller arms are 12 and 10 cms. Distance of the pivot of bell crank lever from governor axis is 14 cm. find the initial compression on the spring, taking into account obliquity of the arms.

15M

Unit – IV

7. a) Four masses are attached to a shaft which is rotating at an angular speed of ω rad/s? If all the masses are in the same plane, then describe the analytical and graphical method of balancing these four masses by a single mass only.

4M

b) Four masses of mass m1= 100kg, m2=175kg, m3=200kg, and m4=25kg are fixed to the cranks of 20cm radius and revolve in planes 1, 2, 3 and 4 respectively. The angular positions of the cranks in planes 2, 3 and 4 with respect to the crank in plane 1 are respectively 750, 1350 and 2000 taken in the same sense. The distances of the planes 2, 3 and 4 from plane 1 are 60cm, 180cm, and 240cm respectively. Determine the position and magnitude of the balance mass at the radius of 60cm in plane L and M located midway between planes 1 and 2, and planes 3 and 4 respectively.

11M

8. Derive the expressions for variation in tractive force, swaying couple and hammer blow for an uncoupled two cylinder locomotive engines.

15M

Unit – V

9. a) Discuss various types of vibrations. 5M b) A vibrating system consists of a mass 50kg, a spring of stiffness 30kN/m and a damper.

The damping provided is only 20% of the critical value. Determine: i. The damping factor ii. The critical damping coefficient iii. The natural frequency of damped vibrations iv. The logarithmic decrement v. The ratio of two successive amplitudes

10M

10. a) Establish an expression for the natural frequency of free transverse vibrations for a simply supported beam carrying number of point loads by Dunkerley’s method.

6M

b) A steel shaft of 1.5m long is 95mm in diameter for the first 0.6m of its length, 60mm in diameter for the next 0.5m of the length and 50mm in diameter for the remaining 0.4m of its length. The shaft carries two flywheels at two ends, the first having a mass of 900kg and 0.85m radius of gyration at the 95mm diameter end and the second having a mass of 700kg and 0.55m radius of gyration located at the other end. Determine the location of the node and the natural frequency of free torsional vibration of the system. The modulus of rigidity of shaft material may be taken as 80GN/m2.

9M





MANUFACTURING TECHNOLOGY-II (Mechanical Engineering)



Unit – I

1. a) What is the need of chip breakers and mention their relative advantages? 5M b) In orthogonal turning of a 50mm diameter mild steel bar on a lathe the following Data

were obtained Rake angle=150, cutting speed =100m/min, Feed=0.2mm/rev. Cutting force=180kg, Feed Force = 60kg. Calculate the shear angle , Coefficient of friction (µ), the chip flow velocity (Vf) and shear force, if the chip thickness is 0.3mm.

10M

2. a) Explain why studying the types of chips produced are important in understanding metal cutting operation.

8M

b) A carbide tool while machining a mild steel work piece was found to have a life of 1 hour and 40 minutes when cutting at 50m per minute. Find the tool life if the tool is to operate at speed 30% higher than previous one. Also calculate the cutting speed if tool is required to have a life of 2 hours and 45 minutes. Assume Taylor’s exponent n=0.28.

7M

Unit – II

3. a) Draw a tool layout for production of hexagonal button using capstan lathe. 7M b) Sketch and describe the following:

i. Angle plate ii. Lathe dog iii. Face plate iv. Mandrel

8M

4. a) What are the main parts of turret lathe? Describe in brief with the help of suitable illustrations.

8M

b) Describe the working of a collect chuck.

7M

Unit – III

5. a) Sketch and explain crank slotted link mechanism used in shaper. 5M b) A mild steel plate 400mm X 800mm X 30mm is to be shaped along its wider face the

ratio of return time to cutting time is 2:3 and the feed per cycle is 2mm. Tool approach and the over-travel respectively are 50mm each. Select a suitable cutting speed and calculate the machining time required for machining the given plate with H.S.S tools.

10M

6. a) Explain the concept of up milling and down milling with a neat sketch. 7M b) Explain horizontal milling machine with a neat sketch and state its applications. 8M

Unit – IV

7. a) How does a gang drilling machine differ from multiple spindle drilling machines? 6M b) How deep hole drilling is performed and sketch the gun drill?

9M

8. a) Describe the working of tool and cutter grinding machine and explain how the angles to be ground on single point cutting tool.

9M

b) Describe grit, grade and structure of grinding wheel.

6M

Cont…2

:: 2 ::

Unit – V

9. a) What is Honing? Explain the vertical honing machine with a neat sketch. 10M b) What are the uses and advantages of Jigs and Fixtures?

5M

10. a) What is clamping? What are the types of clamping devices? Explain any two types of devices.

10M

b) What are the classifications of Jigs? Explain any two types. 5M




(Regulations: VCE-R14) THERMAL ENGINEERING-II

(Mechanical Engineering) Date: 23 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) Explain any one method to increase efficiency of Rankine cycle. 5M b) A turbine is supplied with steam at a pressure of 32bar and a temperature of 4100C. The

steam then expands isentropically to a pressure of 0.08bar. Find the dryness fraction at the end of expansion and thermal efficiency of the cycle. If the steam is reheated at 5.5bar to a temperature of 3950C and then expanded isentropically to a pressure of 0.08bar, what will be the dryness fraction and thermal efficiency of the cycle?

10M

2. a) Differentiate between Carnot cycle and Rankine cycle. 7M b) A simple Rankine cycle works between pressures 40 bar and 0.05 bar, the initial

condition of steam being dry saturated. Calculate the cycle efficiency and specific steam consumption.

8M

Unit – II

3. a) What are the functions of boiler mountings? Explain with neat sketch any two of the following boiler mountings: i. Water level indicator ii. Pressure gauge iii. Feed check valve iv. Blow off cock

6M

b) What do you understand by the term “Boiler draught”? What are the various types of draughts used in usual practice? What are the advantages of artificial draught over natural draught?

9M

4. a) What is the effect of friction on the flow through a steam nozzle? Explain with the help of h-s diagram.

7M

b) Determine the mass flow rate of steam through a nozzle having an isentropic flow through it. Steam enters a nozzle at 10 bar, 5000C and leaves at 6 bar. Cross-sectional area at exit of the nozzle is 20cm2. Velocity of steam entering nozzle may be negligible. Show the process on h-s diagram.

8M

Unit – III

5. a) Explain working principle of any two types of surface condensers with neat sketches. 7M b) The absolute pressure in the condenser is 11.56kPa when the barometer reads 1bar. The

condenser temperature is 400C. Calculate the partial pressure of air, vacuum efficiency and mass of air present in the condenser per kg of steam.

8M

6. a) Derive the expression for maximum efficiency of an impulse turbine. 7M b) The steam supply to an impulse turbine with a single row of moving blades is 2kg/s. The

turbine develops 130kW, the blade velocity being 175m/s. The steam flows from a nozzle with a velocity of 400m/s and the velocity coefficient of blades is 0.9. Find the nozzle angle, blade angle at entry and exit, if the steam flows axially after passing over the blades.

8M

Cont…2

:: 2 ::

Unit – IV

7. a) Define degree of reaction and show that for a 50% degree of reaction the moving and fixed blades have the same shape.

8M

b) In a reaction turbine, the fixed blades and moving blades are of the same shape but reversed in direction. The angles of the receiving tips are 350 and of the discharging tips 200. Find the power developed per pair of blades for a steam consumption of 2.5kg/s, when the blade speed is 50m/s. If the heat drop per pair is 10.04kJ/kg, find the efficiency of the pair.

7M

8. a) What are the different methods to increase thermal efficiency of a gas turbine plant and explain any one?

6M

b) Air is drawn in a gas turbine unit at 150C and 1.01bar and pressure ratio is 7:1. The compressor is driven by HP turbine and LP turbine drives a separate power shaft. The isentropic efficiencies of compressor and the HP and LP turbines are 0.82, 0.85 and 0.85 respectively. If the maximum cycle temperature is 6100c. Calculate: i. The pressure and temperature of the gases entering the power turbine ii. The net power developed by the unit per kg/s of mass flow iii. The work ratio iv. The thermal efficiency of the unit

Neglect the mass of the fuel and assume the following : For compression process : Cpa=1.005 kJ/kg K and ϒ=1.4 For combustion and expansion processes : Cpg=1.15 kJ/kg K and ϒ=1.333

9M

Unit – V

9. a) Explain the working principle of solid propellant rocket with the help of neat sketch and mention its applications.

8M

b) Mention advantages and disadvantages of liquid propellant rocket.

7M

10. a) With the help of neat sketch explain the working principle of Ramjet engine. 7M b) A turbojet engine flying at a speed of 990km/h consumes air at a rate of 54.5kg/s.

Calculate: i. Exit velocity of jet, when enthalpy changes for the nozzle is 200kJ/kg and velocity

coefficient is 0.97, ii. Fuel flow rate in kg/s, when air-fuel ratio is 75:1 iii. Thrust specific fuel consumption

8M





DESIGN OF MACHINE MEMBERS-I




Unit – I

1. a) What are the manufacturing considerations of materials in machine design? 5M b) A circular shaft of diameter 50mm fixed at one end is subjected loads as shown in Fig.1.

Determine the maximum normal and shear stresses at the fixed end:

Fig.1

10M

2. a) A circular shaft 0.5m in length is to sustain and torque of 12kN-m. The allowable shear stress in the material is 120MPa. Determine the diameter of the rod: i. Based on shear strength ii. Based on stiffness limiting the angular deflection to 2 radians. Take G=80GPa

6M

b) An unknown weight falls through 20mm on to a collar rigidly attached to the lower end of a vertical bar 2m long and 500sqmm in section. If the maximum instantaneous extension is 2mm, what is the corresponding stress and the value of the unknown weight? Take E=200GPa.

9M

Unit – II

3. a) Explain the various methods for the reduction of stress concentration. 5M b) A circular bar of 500mm length is supported freely at its two ends. It is acted upon by a

central concentrated cyclic load having a minimum value of 20kN and a maximum value of 50kN. Determine the diameter of bar by taking a factor of safety of 1.5, size effect of 0.85, surface finish factor of 0.9. The material properties of bar are given by Ultimate strength of 650MPa, Yield strength of 500MPa and endurance strength of 350MPa. Take Kf =1.

10M

4. a) Explain modified Goodman diagram with a neat sketch. 5M b) A transmission shaft of cold drawn steel 27Mn2 (Sut=500 N/mm2 and Syt=300 N/mm2) is

subjected to a fluctuating torque which varies from-100N-m to +400 N-m. The factor of safety is 2 and the expected reliability is 90%. Neglecting the effect of stress concentration, determine the diameter of the shaft. Assume the distortion energy theory of failure.

10M

Unit – III

5. a) What are the various modes in which a riveted joint may fail? 7M b) A double riveted lap joint with zig-zag riveting is to be designed for 13mm thick plates.

Assume σt=80MPa; τ=60MPa; and σc=120MPa .State how the joint will fail and find the efficiency of the joint.

8M

Cont…2

:: 2 ::

6. a) What is throat of fillet weld? Write down the expression for strength of butt weld in terms of permissible tensile stress, thickness of plate and length of welded joint.

5M

b) A plate, 75mm wide and 10mm thick, is joined with another steel plate by means of single transverse and double parallel fillet welds, as shown in Fig.2. The joint is subjected to a maximum tensile force of 55kN. The permissible tensile and shear stresses in the weld material are 70N/mm2 and 50N/mm2, respectively. Determine the required length of each parallel fillet weld:

Fig.2

10M

Unit – IV

7. a) Explain briefly about Torque requirement for bolt tightening. 5M b) A steam engine of effective diameter 300mm is subjected to a steam pressure of

1.5N/mm2. The cylinder head is connected by 8 bolts having yield point 330MPa and endurance limit at 240MPa. The bolts are tightened with an initial preload of 1.5 times the steam load. A soft copper gasket is used to make the joint leak proof. Assuming a factor of safety 2, find the size of bolt required. The stiffness factor for copper gasket may be taken as 0.5.

10M

8. a) Explain the design of square and flat keys. 6M b) Design a Cotter joint to connect piston rod to the crosshead of a double acting steam

engine. The diameter of the cylinder is 300mm and the steam pressure is 1N/mm2. The allowable stresses for the material of cotter and piston rod are as follows: 50 t MPa , 40MPa and 84 c MPa

9M

Unit – V

9. a) How will you design shaft as per ASME Code? 5M b) A line shaft is driven by means of a motor placed vertically below it. The pulley on the

line shaft is 1.5metre in diameter and has belt tensions 5.4kN and 1.8kN on the tight side and slack side of the belt respectively. Both these tensions may be assumed to be vertical. If the pulley be overhang from the shaft, the distance of the centre line of the pulley from the centre line of the bearing being 400mm, find the diameter of the shaft. Assuming maximum allowable shear stress of 42MPa.

10M

10. a) What is coupling? What are the requirements of a good coupling? 5M b) Design and draw a protective type of cast iron flange coupling for a steel shaft

transmitting 15kW at 200r.p.m. and having an allowable shear stress of 40MPa. The working stress in the bolts should not exceed 30MPa. Assume that the same material is used for shaft and key and that the crushing stress is twice the value of its shear stress. The maximum torque is 25% greater than the full load torque. The shear stress for cast iron is 14MPa.

10M





METROLOGY AND INSTRUMENTATION ENGINEERING




Unit – I

1. a) Explain the concept of interchangeability and selective assembly with an example. 7M b) Calculate the limits and tolerances for a hole and shaft pair, the basic size is 100mm dia

and hole with tolerance grade 8 and the shaft with tolerance grade 6. The assumptions are: i. Upper deviation of shaft is -16D0.44 ii. Fundamental tolerance unit, 30.45 0.001i D D iii. Diameter steps are 80 – 100 mm iv. Follow hole basis system

8M

2. a) Explain with the help of neat sketches, the principle and construction of an Angle dekkor. 6M b) Calculate the fundamental deviation and tolerances and hence obtain limits of hole and

shaft for the fit 25H8d9 for the diameter steps of 18, 30. Fundamental deviation of shaft is -16D0.44. Consider gauge-tolerance, design a plug gauge and snap gauge.

9M

Unit – II

3. a) How are mechanical comparators advantageous? With constructional features, explain the working of Dial Indicator.

7M

b) Write a neat sketch of Tool Makers Microscope. List the applications of Tool Makers Microscope.

8M

4. a) Describe with a neat sketch the construction and working of sigma comparator. 8M b) Which comparator works on the principle of pressure difference generated by the air

flow? With a neat sketch, explain the working process.

7M

Unit – III

5. a) Describe a gear tooth vernier caliper and explain its use for checking tooth thickness and depth of tooth.

8M

b) Describe the following alignment tests on a milling machine with neat sketches: i. Parallelism of work table surface to the main spindle ii. Parallelism of the cross movement of the work table to the main spindle

7M

6. a) Explain the various elements of surface texture with neat sketch. 7M b) With the help of a neat sketch explain the working principle of Taylor HabsonTalysurf to

measure surface roughness. 8M

Unit – IV

7. a) What is transducer? Explain the working of a LVDT with neat sketch. 8M b) Explain briefly how a centrifugal tachometer is used to measure speed? State its

advantages.

7M

Cont…2

::2::

8. a) Draw a neat sketch and explain the working of unbonded resistance type strain gauge. 8M b) A rectangular rosette was used to determine the stress situation in a certain experiments

and following observations are recorded: ε1=900µm/m ε2=300µm/m ε3=-200µm/m Determine the principal strains, principal stresses and the location of principal planes. Take E=200GPa and υ=0.3.

7M

Unit – V

9. a) Explain the operation of pirani thermal conductivity gauge for pressure measurement with a sketch.

8M

b) How seismic instruments are used for measuring acceleration? Explain in detail.

7M

10. a) What is thermocouple? With a neat sketch explain its construction working principle and applications.

8M

b) Discuss the working of a bourdon tube pressure gauge with relevant sketch and mention merits and demerits.

7M




(Regulations: VCE-R14) DESIGN OF REINFORCED CONCRETE STRUCTURES

(Civil Engineering) Date: 16 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) A single reinforced Beam of rectangular section 400mm x 560mm (Overall) has an effective cover of 40mm. The Beam is reinforced with 4 bars of 20mm in diameter. Determine the moment of resistance of the section. Also find the strains in concrete and steel. Materials used are M20 grade of concrete and Fe 415 steel.

10M

b) Why IS: 456-2000 does not permit the design of over reinforced RCC Sections? Explain.

5M

2. a) Explain the situation under which a doubly reinforced beam is recommended by IS456-2000.

4M

b) Design a rectangle beam for an effective span of 6m. The imposed load on the beam is 80kN/m and the size of the beam is limited to 300mm x 700mm (Overall). Use M20 grade of concrete and Fe 415 steel (Assume clear cover).

11M

Unit – II

3. A reinforced concrete beam 250mm wide and 375mm effective depth is subjected to ultimate design shear force of 90KN at the critical section near supports. The tensile reinforcement is 1358mm2. Design the shear stirrups near the supports. Also design the minimum shear reinforcement at the mid-span. Assume the concrete of grade M20 and Steel Fe 415.

15M

4. A simply supported beam of size 230 x 440 mm effective depth. It is reinforced with 6 no`s 16mm diameter bars. It is subjected to a factored shear of 200kN at support. Design the shear reinforcement if 2 no`s 16mm diameter bars are bent up. Use M20 and Fe415 grades of concrete and steel.

15M

Unit – III

5. a) Differentiate between One-way and Two-way Slabs. 4M b) Design a simply supported slab for a garage of dimension 3.5m x 8.0m with 230mm wall

around. Assume the superimposed load as 5KN/m2. Assume the M20 grade of concrete and Fe 415Steel.

11M

6. Design the RC Slab 6.3m x 4.5m simply supported on all the four sides. It has to carry is a total load of 10KN/m2 in addition to its dead load. Corners are not restrained. Assume the M25 grade of concrete and Fe 415 steel.

15M

Unit – IV

7. Design a short circular column of diameter 400 mm to support a factored axial load of 900kN, together with a factored moment of 100kN.m. Adopt M20 grade concrete and Fe415 grade steel and sketch the reinforcements.

15M

8. a) Why does code require all columns to be able to resist a minimum eccentricity of

loading? Also explain the function of the transverse reinforcement in a RC Column. 5M

b) Design the reinforcement for a short axially loaded square column of size 400mm x 400mm to support a load of 1000KN. Sketch the details of the reinforcements use M20 grade concrete and Fe415.

10M

Cont…2

::2::

Unit – V

9. Design one of the flights of stairs of a school building spanning between landing beams to suit the following data: Data: Type of staircase: Waist slab type (dog legged) Number of steps in flight=12 Tread T=300mm Rise=160mm Width of landing beams=400mm Materials: M-20 grade concrete and Fe-415 HYSD bars

15M

10. A reinforced column 400 mm by 400 mm supports an axial service load of 1000kN. The safe bearing capacity of soil at site is 200kN/m2. Adopting M20 grade concrete and Fe415 HYSD bars design a suitable footing for the column and sketch the details of reinforcements.

15M




(Regulations: VCE-R14) WATER RESOURCES ENGINEERING-I



Unit – I

1. a) Explain the Hydrologic cycle with a neat sketch. 8M b) A basin has the area in the form of a regular pentagon with each side of length 20km. The

five rain gauges located at the corners A, B, C, D and E have recorded 60,81,73,59 and 45mm of rainfall respectively. Compute average depth of rainfall over the basin using Theissen polygon method.

7M

2. a) Explain the factors affecting runoff. 8M b) For a storm of 3 hours duration the infiltration rates are as follows. If the surface runoff is

3.2cm, determine the ɸ-index and w-index:

Time Period (mintues) 30 30 30 30 30 30 Rainfall Rate (cm/hr) 1.2 3.1 4.5 3.0 2.0 1.1

7M

Unit – II

3. a) Write short notes on the following: i. S-hydrograph ii. Synthetic unit hydrograph

8M

b) The ordinates of a 12-hour unit hydrograph are given below. Compute 6-hour unithydrograph ordinates using S-curve technique:

Time(hr) 0 6 12 18 24 30 36 42 48 54 60 66 72 12-hr UH (cumec) 0 1 4 8 16 19 15 12 8 5 3 1 0

7M

4. a) What is unit hydrograph and explain the limitations and its applications? 8M b) The following are the ordinates of the hydrograph of flow form a catchment area of

770sq.km due to 6hr rain fall. Derive the ordinates of the 6hr unit hydrograph. Make suitable assumptions regarding the base flow:

Time (Hours) 0 6 12 18 24 30 36 42 48 54 60 66 72 Flow (Cumecs)

40 63 215 360 400 350 270 205 145 100 70 50 40

7M

Unit – III

5. a) Explain briefly on well development. 7M b) A 15 cm diameter well is drilled in a confined aquifer 32m deep, to the complete depth.

The well is pumped at a constant rate of 260lpm. At steady state, the drawdown in observation wells located at 10m and 100m away was observed to be 4.1m and 0.09m respectively. Find aquifer parameters and radius of influence.

8M

Cont…2

::2::

6. a) Distinguish between Hydraulic conductivity and intrinsic permeability; Darcy velocity and actual velocity; specific retension and specific yield; aquiclude and aquitard.

6M

b) The pumping out test on a free aquifer was performed and the observation of the experiment was found to be as under: Diameter of well 20cm, Discharge from the well 240m3/hr, R.L. of original water surface before pumping started 240.5m, R.L. of water in the well at constant pumping 235.6m, R.L. of impervious layer 210m, R.L. of water in observation well 239.8m, radial distance of observation well from the tube well 50m. Estimate permeability of the well and radius of influence.

9M

Unit – IV

7. a) What is Crop rotation? What is the necessity for rotation? What are its advantages? 8M b) The following data pertains to the healthy growth of a crop:

i. Field capacity of soil=30 % ii. Permanent wilting point=11 % iii. Density of soil=1300kg/m iv. Effective depth of root zone=700mm v. Daily consumptive use of water for the given crop=12mm For healthy growth moisture content must not fall below 25% of the water holding capacity between the field capacity and the permanent wilting point. Determine the watering interval in days.

7M

8. a) Explain the terms ‘duty’ and ‘delta’. Derive a relationship between the two. 7M b) Determine the design discharge for the following data:

Crop Base period (days)

Area (hectares)

Duty at the head of canal (hect/cumec)

Sugar cane 320 850 580 Overlap for sugar cane in hot weather 90 120 580

Wheat (Rabi) 120 600 1600 Bajri (Mansoon) 120 500 2000 Vegetable (Hot weather) 120 360 600

Take time factor for the canal as 13/20 and capacity factor as 0.8

8M

Unit – V

9. a) Describe SCS curve number method to estimate discharge. 6M b) Design an irrigation canal to carry a discharge of 45cumecs, assuming Manning’s

coefficient= 0.0225 and critical velocity ratio as 1. The channel has a bed slope of 0.16 per kilometer.

9M

10. a) With the help of a neat figure, explain balancing depth. 6M b) Design an irrigation channel in alluvial soil with the following data:

Full supply discharge=15m3/sec Lacey’s silt factor=1.0 Channel side slope=1/2:1 Also find bed slope of channel

9M




(Regulations: VCE-R14) GEO TECHNICAL ENGINEERING-I



Unit – I

1. a) With the help of three phase diagram, explain the following terms: i. Void ratio ii. Degree of saturation iii. Percent air voids

7M

b) A soil sample has a porosity of 40%. The specific gravity of solids is 2.67. Calculate: i. Void ratio ii. Dry density iii. Unit weight if the soil is 50% saturated iv. Unit weight if completely saturated

8M

2. a) Explain briefly soil classification as per Indian standard classification system. List only the salient features of this classification.

7M

b) The following readings were obtained from a liquid limit test on clay sample. If plastic limit=13%, natural water content=15%, determine the liquid limit, flow index and consistency index.

Number of blows: 5 16 23 42 Water content (%) 32 27.80 25.50 23.30

8M

Unit – II

3. a) Write notes on soil water. 8M b) A falling head permeability test is to be performed on a soil sample whose coefficient of

permeability is 2x10–5cm/s. What diameter of the standpipe should be used if the head is to drop from 27cm to 20cm in 5 minutes and if the cross-sectional area and length of the sample are respectively 15cm2 and 8.5cm?

7M

4. a) Derive the expression to determine the quantity of seepage through an earth dam, using a flow net.

7M

b) An earth dam is built on an impervious foundation with a horizontal filter at the base near the toe. The permeability of the soil in the horizontal and vertical directions are 3x10-2mm/s and 1x10-2mm/s respectively. The full reservoir level is 35m above the filter. A flow net constructed for the transformed section of the dam consists of 4 flow channels and 16 head drops. Estimate the seepage loss per metre length of the dam.

8M

Unit – III

5. a) Explain the construction of Newmark’s influence chart. 8M b) Two concentrated loads 250kN and 350kN spaced at 6 m act on the ground surface. Find

the increase in vertical stress at a depth 6m below its load and also at midpoint between the loads at the same depth.

7M

Cont…2

:: 2 ::

6. a) Discuss the effect of compaction on soil properties. 7M b) The standard Proctor compaction test in a mould of volume 945cm3 was carried out on

samples of soil and yielded the following results:

Water content (%) 9.5 12.5 14.2 15.9 17.5 Bulk density (kN/m3) 18.5 21.0 21.75 21.2 20.5

Calculate the optimum moisture content and maximum dry density.

8M

Unit – IV

7. a) Explain the procedure to determine the coefficient of consolidation using Casagrande’s logarithm of time fitting method.

7M

b) In a consolidation test the pressure on a sample was increased from 140 to 280kN/m2. The void ratio after 100% consolidation under 140kN/m2 was 0.95, and that under 280kN/m2 was 0.82. The coefficient of permeability of the soil was 20x10-6mm/s, and the initial height of the sample was 20mm. Determine: i. The coefficient of consolidation ii. The time taken in days for 90% consolidation of the layer of this clay, 0.5m thick in the field, sandwiched between an impervious layer beneath and the pervious layer on top.

8M

8. a) Define normally-consolidated clay, over-consolidated clay, over consolidation ratio and isochrones.

8M

b) During an oedometer test, the initial void ratio of the specimen was 0.945, and the thickness of the specimen after 24hours at each load was found to be:

σ' (kPa) 0 25 50 100 200 400 800 Thickness (mm) 19.05 18.85 18.44 18.03 17.63 17.21 16.8

Find Cc from the e-log(σ') curve.

7M

Unit – V

9. a) Write a note on the laboratory box shear test. 7M b) The following results were obtained from a triaxial test on two soil specimens:

Sample No.

Confining Pressure(kPa)

Deviator Stress at failure(kPa)

Pore water pressure(kPa)

1 200 244 55 2 300 314 107

Determine the shear strength parameters of the soil in terms of: i. Total stresses ii. Effective stresses

8M

10. a) Explain Mohr–Coulomb failure theory. 7M b) Specimens of silty sand were subjected to the direct shear test in the laboratory, in a

shear box of 60mmx60mm size. The normal load and the corresponding shear forces at failure are shown below:

Normal load(kg.) 10 20 30 Shear force (kg.) 9.9 15.41 20.88

Draw the failure envelope and determine the angle of shearing resistance and cohesion of the soil.

8M





STRUCTURAL ANALYSIS-II

(Civil Engineering)



Unit – I

1. Analyse the portal frame shown in below Fig.1 using moment distribution method and draw B.M.D:

Fig.1

15M

2. Determine the support moments for the continuous girder shown in the Fig.2 If the support B sinks by 2.5mm. For all members take I=3.5 X 107mm4 and E=200N/mm2. Use Kani’s method:

Fig.2

15M

Unit – II

3. Analyze the portal frame shown in Fig.3 also draw the deflected shape of the frame. The end A is fixed and The end D is hinged using slope deflection method:

Fig.3

15M

Cont...2

::2::

4. a) Determine the horizontal reaction in a semi circular two hinged arch when a load ‘W’

acts at a point P as shown in the Fig.4. Assume uniform flexural rigidity:

Fig.4

7M

b) A parabolic arch hinged at the ends has a span 30m and rise 5m. A concentrated load of 12KN acts at 10m from the left hinge. The second moment of area varies as the secant of the slope of the rib axis. Calculate the horizontal thrust and the reactions at the hinges.

8M

Unit – III

5. Determine the shear forces and end moments in the column and the beams of the building frame shown in Fig. 5 by portal method:

Fig.5

15M

6. Determine the shear forces, axial forces and end moments in the column and the beams of the building frame shown in Fig.6 by cantilever method:

Fig.6

15M

Unit – IV

7. Analyse the two span continuous beam loaded as shown in the Fig.7 by the force method. Take EI constant:

Fig.7

15M

Cont…3

::3::

8. Analyse the continuous beam shown in the Fig.8 by displacement method and sketch B.M.D:

Fig.8

15M

Unit – V

9. a) What is influence line diagram? Compare BMD with ILD for BM? 7M b) Construct the influence line diagram for the reaction at central support of the

continuous beam shown in the Fig.9. EI is uniform. Give ordinates at 2m intervals:

Fig.9

8M

10. Find the vertical deflection of the joint D for the truss loaded as shown in Fig.10. All members have the same sectional area:

Fig.10

15M




(Regulations: VCE-R14) ENGINEERING GEOLOGY



Unit – I

1. a) Explain the important failures of civil constructions due to adverse geological conditions. 8M b) Explain about the physical Geology, Petrology and Structural geology and their Civil

Engineering significance.

7M

2. a) What is deterioration of rocks? How to control the deterioration of rocks? 8M b) Define weathering of rocks and explain types of weathering.

7M

Unit – II

3. a) Describe the physical properties and engineering uses of the following minerals: i. Calcite ii. Gypsum iii. Galena

8M

b) Discriminate mineral and rock forming mineral and add a note on physical properties of minerals which are dependent on light.

7M

4. a) Write a note on the following: i. Texture of metamorphic rocks ii. Primary structure of sedimentary rocks

8M

b) What do you understand by the term plutonic, hypabyssal and volcanic rocks? Give suitable examples.

7M

Unit – III

5. a) Define unconformity and add a descriptive note on classification of unconformity. 8M b) What are joints? Explain its types and add a note on engineering consideration dealing

with jointed rocks.

7M

6. a) Illustrate the phenomenon of faulting with neat sketch. Describe any three types of faulting and how do you recognize faulting at the field.

8M

b) What are folds? Classify any five types of folds.

7M

Unit – IV

7. a) Explain the ground water investigations by electrical resistivity method and mention other applications of electrical resistivity method.

8M

b) What is ‘Life of Reservoir’? Explain the methods to control reservoir silting.

7M

8. a) Explain the scope of geological surveys in selection of dam sites. 8M b) Write a note on magnetic methods of geophysical exploration.

7M

Cont…2

:: 2 ::

Unit – V

9. a) What is over break? Explain the controls of over break and its influence on lining in tunnels.

8M

b) Write the comparison of various aspects of tunneling in igneous, sedimentary and metamorphic terrain.

7M

10. a) State few examples of tunnels of interest and importance. 8M b) Explain the importance of groundwater conditions with reference to lithology and

structures in tunnel site. 7M




(Regulations: VCE-R14) ESTIMATING AND COSTING



Unit – I

1. a) Define approximate estimate. Explain the difference between approximate and detailed estimate.

7M

b) Explain the general items of work in a building with their units.

8M

2. Calculate the quantities for the following items by any one of the method: i. Earthwork in excavation ii. Cement Concrete in foundation iii. Brickwork in foundation and plinth

Fig.1

15M

Unit – II

3. a) Explain the mean sectional method of road estimation. 6M b) Calculate the quantity of earthwork for 300m length for a portion of road in a uniform

ground the heights of banks at the two ends being 1.2m and 1.8m. The formation width is 12m and the side slopes 2:1. Assume that there is no transverse slope.

9M

4. Workout the embankment for the road from the following data. Formation width-10m embankment slope-2:1 cutting slope-1:1. The height of embankment and cutting is given below:

Chainage m) 0 30 60 90 120 150 180 210 240 270 300 Height of embankment 0.80 0.85 0.25 0.25 0.00 - - - - - -

Depth of cutting - - - - - 0.10 0.40 0.30 0.20 0.25 0.10

15M

Cont…2

:: 2 ::

Unit – III

5. a) Prepare the rate analysis for cement concrete in foundation 1:2:4. 10M b) Define the terms:

i. Contingencies ii. Technical sanction

5M

6. a) Define rate analysis? Discuss the factors affecting rate analysis. 7M b) Calculate the rate per cu.m of lime concrete in roof terracing with 20mm stone ballast,

white lime, sand proportion of 1:2:4.

8M

Unit – IV

7. a) Define contract. Explain briefly the requirements of contract. List out the all points regarding “Notice inviting tenders (N.I.T)”.

7M

b) Explain briefly the following: i. Turn-key contract ii. Package deal contract iii. Lump sum contract iv. Item rate contract

8M

8. Fig.2 shows the section along the shorter span of a room size 4 x5.5m. The thickness of slab is 13cm. the thickness of walls is 40cm. Prepare the bill of quantities of R.C.C. slab. Prepare bar bending schedule:

Fig.2

15M

Unit – V

9. a) Explain the detailed specification for cement concrete 1:2:4. 7M b) An R.C.C framed structure building having estimated future life of 80 years, fetches a

gross annual rent of Rs.2200/- per month. Work out its capitalized value on the basis of 6% net yield. The rate of compound interest for sinking fund may be 4%. The plot measures 400 sq.m. and cost of land may be taken as Rs.120/- per sq.m. The other out goings are: Repair and maintenance = 1/12 of gross income Municipal and property taxes = 25% gross income Management and miscellaneous = 7% gross income The plinth area of the building is 800 sq.m. and cost per sq.m. may be taken as Rs.500/- per sq.m.

8M

10. a) Differentiate between the following: i. Salvage value and Scrap value ii. Free hold and Lease hold properties

6M

b) A building is situated by the side of a main road of Hyderabad city on a land of 500Sq.m. The built-up portion is 35m x 10m. The building is provided with water supply, sanitary and electrical fittings and the age of the building is 30 years. Work out the valuation of the property if the plinth area rate including water supply, sanitary and electric fittings is Rs. 8,000/-per Sq.m. and the life of the building is 100 years. Take cost of land to be Rs.750/-per Sq.m.

9M




(Regulations: VCE-R14) UNIX PROGRAMMING

(Computer Science and Engineering) Date: 25 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) Explain the following commands with example: i. cat ii. rmdir iii. pwd

6M

b) Explain the architecture of UNIX operating system.

9M

2. a) Explain the sorting command with options in detail 7M b) Briefly explain the difference between fgrep, egrep with examples.

8M

Unit – II

3. a) Explain ‘while’ and ‘for’ loops with an example. 10M b) Write a shell script to find the factorial value of any number entered through the

keyboard.

5M

4. a) What is a directory? List and explain various directory maintenance system calls. 12M b) Write in brief about input and output redirection.

3M

Unit – III

5. a) What is a process? Draw and explain the structure of a typical process in detail. 10M b) Describe in detail about unreliable signals.

5M

6. a) What is the role of the following system calls in signal generation: i. pause ii. alarm iii. kill iv. sleep

10M

b) Explain about zombie process in detail.

5M

Unit – IV

7. a) Discuss about System V IPC mechanisms (messagequeues, semaphores, shared memory).

12M

b) Differentiate between pipes and named pipes.

3M

8. a) Write a program to implement the creation of pipe. 7M b) What is shared memory? What is the importance of it? Explain in detail about the

system calls of shared memory.

8M

Unit – V

9. a) Write about IPv6 address structure with its usage. 7M b) Explain the socket attributes.

8M

10. a) What are the system calls required to establish communication between client and server?

12M

b) What are the advantages of connection oriented communication? 3M




(Regulations: VCE-R14) SIGNALS AND SYSTEMS

(Electrical and Electronics Engineering) Date: 18 November, 2016 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) Explain the time-shifting, time scaling, signal addition and signal multiplication operations performed on continuous time signals with one example each.

8M

b) For the CT periodic signal ( ) 2 cos2 sin 4x t t t , determine the fundamental frequency and exponential Fourier series coefficients.

7M

2. a) Define various elementary discrete time signals. Indicate them graphically. 6M b) Find the exponential Fourier series for the periodic signal x(t) = t for 0≤ t ≤1 so that it

repeats for every ‘1’ second. 9M

Unit – II

3. a) Sketch and find the Fourier Transform of the signal – 1 – 1x t r t r t u t . 8M b) Find the Fourier Transform of the periodic signal given by 3 2cos 10x t t . And also

sketch the magnitude and phase spectrums.

7M

4. a) State and prove the following properties of Fourier transform: i. Frequency domain convolution property ii. Differentiation in frequency domain

8M

b) Explain the significance of Hilbert Transforms in filter applications. Find the Hilbert transform of a rectangular pulse given by:

12 2

0

T Tfor tx t

elsewhere

7M

Unit – III

5. a) Derive the necessary conditions for an LTI system to support distortionless transmission. 7M b) The input and output of a causal LTI system are described by the following differential

equation:

2

2 3 2d y t dy t

y t x tdtdt

i. Find the frequency response of the system ii. Find the impulse response of the system iii. Find the response of the system for tx t te u t

8M

Cont…2

:: 2 ::

6. a) Find the frequency response of an RL network shown in Fig.1. And also find its impulse

response. Assume R =1Ω and L =1H:

Fig.1

7M

b) Two subsystems 1th t e u t and 2

th t e u t are connected in cascade. Using graphical interpretation of convolution find the overall transfer function 1 2 .h t h t h t

8M

Unit – IV

7. a) Find the Laplace transform of following signals using properties of Laplace transform: 6 4. ( ) 2 ( ) 10 ( )t ti x t e u t e u t

5. ( ) sin10tii x t e t u(t)

8M

b) State and prove Initial value and final value theorems using Laplace Transforms.

7M

8. a) Prove that the signals ( ) ( )atx t e u t and ( ) ( )atx t e u t have same Laplace transform but differ only in ROC and also plot their ROC.

9M

b) Find the Inverse Laplace transform of 2

1log1

s(s )X(s)s

6M

Unit – V

9. a) State and prove the differentiation in z-domain property and convolution property of z-transform.

8M

b) Find the Z-transform and ROC of )(

312)(

753)( nununx

nn

7M

10. a) State and prove the sampling theorem. 8M b) An LTI system is described by the equation y(n) =x(n)+0.81x(n-1)–0.81x(n-2)-0.45y(n-2).

Sketch the poles and zeros on z-plane. Assess the stability. 7M

VARDHAMAN COLLEGE OF ENGINEERING · b) Explain the working of sliding window protocols with a neat...

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