CONFIDENTIAL DFE 4343

This section consists of 40 questions. Each question is followed by four option answers A, B, C, or D. Please choose one answer only. Answer ALL questions.

1. The PLCs were designed as replacement for

1. Microcomputers1. Relay Logic Control Panels1. Analogue Controllers1. Digital Controllers

Describe the similarities and differences between PLC ladder logic and relay ladder logic.

1.

Which of the following statements is NOT TRUE?

1. The PLC rung output [-( )-] is a discrete output instruction or bit in memory.1. Each rung of the ladder logic represents a logical statement executed in software - inputs on the right and outputs on the left.1. Input and output instructions in ladder logic do not directly represent the switches and actuators.1. PLC input instructions are logical symbols associated with voltage at the input module terminals.

1. Which of the following is NOT an advantage of the PLCs offer over the conventional type of control system?

1. Smaller size1. Less expensive1. Slow response1. More reliable

1. Field or real world devices refer to __________.

1. input devices only1. output devices only1. load devices only1. all devices that are physically wired to the PLC

1. The scan time is the time required __________.

1. to record the status of all input devices1. to record the status of all output devices1. to execute one cycle of the total program1. for the information to pass from one circuit to another within the PLC

1. Flowchart systems are to shows ________________. 0. the flow of documents through an information system0. the logic used to create a program0. the big picture view0. how hardware elements are configured in a system

Question 7 and 8 is referred to Figure 1.

Figure 1

1. From Figure 1, named the block for Turn Heater Coil On.

A. ProcessB. Decision C. Input/OutputD. Predefine Process

1. From Figure 1, describe the most suitable name for the whole system.

A. Heat monitoring SystemB. Temperature Monitoring System C. Read Monitoring SystemD. Set Value Monitoring System

9. In a systems flowchart, a terminator symbol can be used to indicate: 1. the start or end of a business process or 1. a destination outside the system boundary.

0. i only0. ii only0. Both i and ii0. Neither i nor ii

10. In creating a systems flowchart, selecting appropriate symbols comes immediately after ______________.

0. determining column headings0. establishing the system boundary0. discussing the flowchart with others0. listing actions performed within each column

Question 11 is referred to Figure 2

Figure 2

3. Figure 2 shows the start condition for Part Loading System, the symbol HR 01.00 is represent _____________.

A. Holding Relay by using address 01.00B. Hold On Relay by using address 01.00C. Hold Off Relay by using address 01.00D. None of the above

3. Once the program has been downloaded, it can be monitored in the Diagram Workspace (which acts a mimic display) during execution. Which of the following procedure to monitor the program are TRUE?

1. Select the PLC object the project workspace.1. Select the Toggle PLC Monitoring button from the toolbar.1. As the program executes, data and power-flow can be followed in the Ladder program; for example, connections are selected and values are incremented.1. All of the above

3. Although the downloaded program has been greyed to prevent direct editing, the Ladder program can be amended by explicitly selecting the On-line Edit feature. It is usual to have the PLC operating in Monitor mode while using on-line editing functions. On-line editing is not possible in Run mode. Which of the following procedure are to edit the program on-line:

1. Select the rungs to be edited by dragging the mouse and selecting the required rungs and select the Compare with PLC button from the toolbar to ensure that the edited area is the same as in the PLC.1. Select the On-line Edit Rungs button from the toolbar. The background to the rung changes to show that it is now an editable area. The rungs outside this area cannot be altered but elements can be copied from these rungs into the editable rungs.1. Edit the rungs as appropriate, when satisfied with the results, select the Send On-line edit Changes button from the toolbar. The editing is checked and transferred to the PLC.1. All of the above

Question 14 is referred to Figure 3

Figure 3

3. Figure 3 shows, the Standard IEC 61131 languages associated with PLC programming. Determine what is X.

1. Graphical1. Pictorial.1. Schematic1. None of the above

Question 15 is referred to Figure 4

Figure 4

1. From Figure 4, by using CJ1M CPU21 PLC, determine address of Switch 1, Switch 2 and Indicator Light if Input module, (ID211) at 4th rack and Output module, (OC211) at 5th rack.

1. Switch 1 : 0.01, Switch 2 : 0.04, and Indicator Light : 1.011. Switch 1 : 4.01, Switch 2 : 4.04, and Indicator Light : 5.011. Switch 1 : 3.01, Switch 2 : 3.04, and Indicator Light : 4.011. Switch 1 : 1.01, Switch 2 : 1.04, and Indicator Light : 2.01

Question 16 and 17 is referred to Figure 5

Figure 5

1. Figure 5 shows two of Timer instruction available in PLC, what is N and S for TIM and TIMX(550)

1. N is Timer Address Number and S is Set Time ValueB. N is Timer ON Number and S is Set ON ValueC. N is Timer OFF Number and S is Set OFF ValueD. None of the above

1. From Figure 5, which from the following statement is TRUE for TIM and TIMX(550)1. TIM is setting for BCD and TIMX is setting for binary set value1. The timer accuracy is 0 to 0.01 s. with TIM or TIMX(550) operates a decrementing timer with units of 0.1-s. 1. The setting range for the set value (SV) is 0 to 999.9 s for TIM and 0 to 6,553.5 s for TIMX(550).1. All of the above

Question 18 is referred to Figure 6

Figure 6

1. Figure 6 shows the programming for the counting system, symbols #5 is represent ______________.

1. Binary number by counting for 5 times 1. BCD number by counting for 5 times.1. Hexadecimal number by counting for 5 times1. None of the above

Question 19 and Question 20 is referred to Figure 6 and Table 1 Table 1 Figure 7

1. Figure 7 shows, the ladder diagram by using CX-Programmer meanwhile Table 1 show the programming data by using console for

A. ON-OFF Delay Timer. 1. ON-OFF Acting Timer1. ON-OFF non energize Timer1. None of the above

1. From Table 1, determine the data for label X 3. TIM0013. TIM0003. TIM00503. TIM0004

Question 21 is referred to Figure 8

Figure 8

1. From Figure 8, which from the following statement is TRUE A. It indicates the end of a program B. It completes the execution of a program for that cycleC. No instructions written after will be executedD. All of the above

1. Which of the following PLC instruction would NOT be classified as an override instruction?

A. Master control resetB. Jump-to-subroutineC. Output energizeD. Jump-to-Label

1. The advantages of the jump-to-label instruction is_____________.

1. any number of rungs may be programmed between the jump label and label rungs1. allows to use one set of condition instructions to control multiple output1. allows to use one set of condition instructions to control multiple input.1. the ability to reduce the processor scan time.

Question 24 is referred to Figure 9

Figure 9 1. Figure 9 shows, the break loop instruction and the flow of the instruction. Determine the name of Y instruction.1. FOR1. NEXT1. RET1. None of the above

Question 25 is referred to Figure 10

Figure 10

1. In the program of Figure 10, when the processor scan reaches the RET instruction, it will return the processor to the___________.1. Start of the program1. End of the program1. Rung above the JSR instruction1. Rung below the JSR instruction.

1. Which of the following would NOT be classified as a sequencer switch A. Rotary switchB. Pressure switchC. Drum switchD. Stepper switch

1. The length of bit shift instruction is given in 1. Words1. Bits.1. Steps1. Files.

1. The common application of shifty register would be_____________.1. Tracking Parts.1. Controlling machine or process.1. Inventory Control.1. All of the above

1. How many data will be shifted out In a word shift register1. 11. 21. 81. 16

1. Which instruction is also known as a FIFO1. Synchronous shift register1. Word to file some1. File to word move1. Asynchronous shift register

Question 31, 32 and 33 is referred to the Figure 11

Figure 11

1. From the Figure 10, how many input and output of the system1. Input : 3, Output : 41. Input : 4, Output : 31. Input : 3, Output : 31. Input : 2, Output : 4

1. From Figure 11, how many weightage in kilogram that the alarm will ON1. 4991. 5101. 2551. 366

1. From Figure 11, the number stored in word N7:1 represents the.

1. Weight of the empty vessel.1. Preset weight of the vessel1. Current weight of the vessel1. Difference between the current and preset weight of the vessel.

Question 34 and 35 is referred to the Figure 12

Figure 12

1. From Figure 12, which of the following statement are TRUE1. When input switch SW is closed the MUL instruction is executed.1. The value stored in source A, address N7:1 (123), is then multiplied by the value stored in source B, address N7:2(61).1. The product (7503) is placed into destination word 7:3. As a result, the equal instruction becomes true, turning output PL1 on.1. All of the above

1. From Figure 12, the number stored in word N7:3 represents the.A. Multiply AddressB. Multiply Current ValueC. The result of division valueD. The result of add value

36.In a current sinking DC input module _____________.

0. The current flows out of the input field device0. Requires that a AC sources be used with mechanical switches0. The current flows out of the input module0. Currents can flow in either direction at the input module

1. AC output field devices can interface to _______________.

0. AC output modules0. Relay output modules

0. Both i and ii0. Neither i or ii0. i only0. ii only

Question 38 and 39 is referred to the Figure 13

Figure 12

38.From Figure 12, how many output in the system

0. 10. 20. 30. 4

39. From Figure 12, by using CJ1M CPU21 PLC, determine address of output if the output module, (OC211) at 3th rack.

A. Relay : 203, Lamp : 207, Motor : 207B. Relay : 203, Lamp : 207C. Relay : 303, Lamp : 307, Motor : 307D. Relay : 403, Lamp : 407

40. What is the different between Solid State Relay (SSR) and Electromechanical Relay (EMR)

0. EMR, contacts are opened or closed by a magnetic force meanwhile SSR, there are no contacts and switching is totally electronic.0. EMR become popular and SSR is commonly used0. Many of the functions performed by heavy-duty equipment need the switching capabilities of SSR and EMR switches the current using non-moving electronic devices such as silicon controlled rectifiers.0. The switching capability of EMR is better than SSR

(End of Question)

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