Prepared by: Gajanan Desurkar STRENGTH OF MATERIALS …

STRENGTH OF MATERIALS [15ME31T]

Question Bank – Unit Wise Department of Mechanical Engineering , Jain Polytechnic, Belagavi

Unit – 1 SIMPLE STRESSES AND STRAINS

S

No

Questions Marks Appeared in

1 Define Young’s modulus & shear modulus. 5 Nov 2016

2 Explain Hoop stress and longitudinal stress in cylindrical

shell. 5

Nov 2016,May 2018,

APRIL 2019, Nov 2019

3 Explain Bulk modulus and modulus of rigidity. 5 May 2017

4 Define Poisson’s ratio and modulus of rigidity.

5 May 2017,Nov 2018,

April 2019, Nov 2019

5 Explain thermal stress and volumetric strain. 5 Nov 2017

6 Define Poisson’s ratio and modulus of Elasticity. 5 May 2018

7 Explain linear and lateral strain 5 Nov 2018

8

A tensile test is performed on a brass specimen 10mm in

diameter using a gauge length of 50mm when applying axial

tensile load of 25Kn it is observed that the distance between

the gauge mark increased by 0.152mm. calculate modulus of

elasticity of brass

10

Nov 2018

9

The Young’s modulus for a given material is 100Kn/mm^2

and its modulus of rigidity is 40Kn/mm^2. Determine its bulk

modulus and also its lateral contraction if the diameter is

50mm and length is 2m and extension is 2mm

10

Nov 2018

10

A circular rod of steel is 20mm in diameter and 500mm long

it is subjected to an axial pull of 45kN.If E for steel is 2*10^5

N/mm^2 find stress, linear strain, change in length, change in

volume take u=0.25.

10 Nov 2016

11

A cylindrical shell of 1.3m diameter is made up of 18mm

thick plates. Find the circumference & longitudinal stress in

the plates. If the boiler is subjected to an internal pressure of

2.4Mpa.Take efficiency of joints as 70%.

10 Nov 2016

Prepared by: Gajanan Desurkar



12

A hollow steel tube 3.5m long has external diameter 120mm

and is subjected to a tensile load of 400KN and extension

measured is 2mm Determine the internal diameter E=200

GPa.

10 May 2017

13

A circular rod of steel is 20mm in diameter and 500mm long

it is subjected to an axial pull of 45KN.If

E=200*10^3N/mm^2.Find stress,linear strain ,change in

length and change in volume of the bar.

10 May 2017

14

A steel bar 50mm wide,12mm thick,300mm long is

subjected to an axial pull of 100KN.Find change in

length,width,thickness and volume of the bar.

E=2*10^5N/mm^2,u=0.32

10 Nov 2017

15

A Bar of 30mm diameter is subjected to a pull of 60KN.Yhe

measured extension on gauge length of 200mm is 0.09mm

and the change in diameter is 0.0039mm.Calculate the

poisson’s ratio & thr values of the Young’s modulus, Rigidity

modulus & Bulk Modulus.

10 Nov 2017

16

A bar of 30mm dia.is subjected to a pull of 60KN.The

measured extension is 0.09mm and gauge length of 200mm

and change in diameter is 0.0039mm.calculate a)Poisson’s

ratio b)Young’s modulus c)Bulk Modulus d)Rigidity Modulus

10 May 2018

17

A steel bar 2m long 40mm wide and 20mm thickness is

subjected to axial pull of 160kN in the direction of its length.

Find the change in length, width and thickness of bar. Take

E=200GPa and Poisson’s ratio=0.3

10 May 2018

18 Explain thermal stresses and bulk modulus 5 APRIL/ MAY 2019

19 Define shear force and point of contraflexure in beams 5 APRIL 2019

20 A bar of steel 4m long ,30mm wide and 20mm thickness is

subjected to an axial load of 30Kn in the direction of its 6 April 2019



length ,find the change in length ,thickness and volume if

Youngs modulus is 200Kn/mm^2

21

A mild steel bar of 15mm diameter was subjected to tensile

test .the test bar was found to yield at a load of 90kn and it

attains maximum lad of 180kn and and ultimately fails at a

load of 67.5kn.determine the following. Tensile stress at the

yield point, ultimate stress and stress at breaking point, if the

diameter of the neck is 7.5mm

10 April 2019

22

A rod of diameter 15 mm and 50 mm long is subjected to

tensile load of 25 kN. The modules of elasticity for steel rod

may be taken as 200 kN/mm2. Find the stress, strain and

elongation of the bar due to applied load.

10 Nov 2019

23

A bar of 30 mm diameter is subjected to an axial pull of 80

kN. The measured extension is 0.1 mm on a gauge length of

200 mm and the change in diameter is 0.04 m. Calculate the

Poisson's ratio and the values of Young's modulus, bulk

modulus and modulus of rigidity

10 Nov 2019

UNIT – 2 MOMENT OF INERTIA

1 Define C.G. and Moment of Inertia. 5 Nov 2016

2 Locate the C.G. of Triangle, Rectangle, Circle, and Semicircle

& Trapezium with the help of plain figure. 5

Dec 2016/May 2017/May

2018/Nov 2018 APRIL

2019, Nov 2019

3 Find the moment of Inertia of Rectangular section about its

base. 5 May 2017

4

State parallel & perpendicular axis theorem applied to

moment of Inertia. 5

Dec 2017/May 2018/Nov

2018 APRIL 2019, Nov

2019

5 a)Determine the centroid of the T-section 150*120*20mm 5+5=

10 Dec 2016



b)Calculate the C.G. of the lamina (All the dimensions are in

mm)

6

Find the centroid of I section

Top flange 100*20mm

Web 20mm*100mm

Bottom flange 200*20mm

05,10

Nov 2018 ,April 2019

7

Calculate the center of gravity of the section shown in figure

05

Nov 2018

8

a)Find Moment of Inertia.

10 Dec 2016/May 2018



9

Find the moment of inertia of a T section shown in fig.about

X-X axis and Y-Y passing through the center of gravity of the

section

10

Nov 2018

10

a)Calculate the Centroid of L-section.

5+5=1

0

May 2017/May 2018


11

b)Calculate the centroid .

10 April 2019

12 Find the M.I. of I-Section about XX & YY axis. 10 Dec 2016



13

Find the Centroid of the lamina

10 May 2017

14

Find the moment of Inertia about the Centroidal axis XX &

YY

10 May 2017/May 2018

15

Find the moment of inertia [Ixx] of I section having top flange

of 100 mm x 20 mm, web 120 x 20 mm and bottom flange

150 x 20 mm.

10 Nov 2019

UNIT-3 SFD & BMD

1 Define shear force and bending moment in beams. 5 Nov 2016, Nov 2019



2 Explain Sagging and Hogging bending moment.

5 May 2017/Nov 2018

APRIL 2019, Nov 2019

3 Name the type of loads acting on the beam with illustration. 5 May 2017/May 2018

4 Explain point of Contra-flexure in a beam.

5 Nov 2017/May

2018/Nov 2018

5 Name three types of beams & three types of loads with

sketches 5 Nov 2017

6

A cantilever 5m long carries point loads of 30KN & 10KN at

a distance of 1m & 5m from the fixed end. In addition to this

the beam carries a UDL 10KN/m between the point loads.

Draw SFD & BMD

10 Nov 2016/Nov 2018

7

A simply supported beam 4m long is subjected to two point

loads of 2KN & 4KN each at a distance of 1.5m & 3m from

the left end.Draw SFD & BMD.

10 Nov 2016

8

A simply supported beam of 8m carries an UDL of 5kN/m for

a length of 3m from the left support and point loads of 6Kn,

5kN and 4kN at 4m,5m and 6m from the left support. Draw

SFD and BMD.

10

Nov 2018

9 a)A cantilever beam of span 4m carries point loads of 2KN at

its free end & 5KN at 1m from free end. Sketch SFD & BMD. 5+5=10 May 2017

10

b)Draw SFD & BMD

10 April 2019

11

A simply supported beam having a span of 6m carries a UDL

of 12KN/m over a length of 4m commencing from left hand

support .It is also carries a point load of 10KN at a distance of

10 May 2017



1m from the right support. Draw SFD & BMD.

12

A cantilever beam of span 3m carries an UDL of 2 KN/n

over a length of 2m from support. In addition it is also

carries point loads of 1KN,2KN,3KN at free end ,1m & 2m

from free end respectively .Draw SFD &BMD

10 Nov 2017

13

A simply supported beam of 8m span carries point loads of

10KN & 20KN at 3m & 5m respectively from the left

support. In addition it also carries a UDL of 10KN for 3 m

starting from the right support. Draw SFD & BMD

10 Nov 2017

14

Draw SFD and BMD for the cantilever beam shown in fig.

10 May 2018

15

Draw SFD and BMD for the simply supported beam shown in

fig.

10 May 2018

16

A cantilever 5m long carries point load of 30Kn and 10Kn at

a distance of 5m from fixed end.in addition to this the beam

carries a UDL of of 10Kn/m between the point load.

Construct shear force and bending moment diagram giving all

salient values

10

Nov 2018

17

A cantilever beam of length 4m subjected to a point load 3kn,

5kn, 8kn and 10kn at a distance of 1m,1.5m,3m and 3.5m

from the free end. draw SFD and BMD.

10 April 2019



18

A simply supported beam 6m long is carrying a uniformaly

distributed load of 2kn/m over a length of 3m from the right

support.draw SFD and BMD for beam. Also calculate

maximum bending moment of the beam

10 April 2019

19

A cantilever beam of length 3 m subjected to point load of 5

KN, 8 KN and 12 KN at a distance of 1 m, 1.5 m and 2.5 m

from the free end. Draw SFD and BMD

10 Nov 2019

20

A simply supported beam of length 8 m carries two point

loads of 30 kN and 40 kN respectively at a distance of 1.5 m

and 6.5 m from the left support. Also it carries a UDL of 10

kN/m between the points loads. Draw shear force and bending

moment diagram.

10 Nov 2019

Unit - 4 THEORY OF SIMPLE BENDING

1

List the assumptions in Theory of simple bending.

5

Nov 2016/May

2017/May 2018/ Nov

2018, Nov 2019

2

Explain modulus of section for solid, rectangular and circular

sections. 5

Nov 2016/May

2017/May 2018/Nov

2018, Nov 2019

3 Write the bending equations with all notations. 5 May 2017, April 2019

4 Explain moment of resistance & modulus of rapture. 5 Nov 2017

5

The moment of inertia of the beam section 500mm deep is

69.49*10^7mm^4 find the longest span over which a beam of

this section when simply supported could carry a UDL of

50Kn/m run .the stress in the material is not to exceed

110N/mm^2.

10

Nov 2018

6

A steel plate is bent into a circular arc of 12 m radius. If the

plate section is 100mm wide & 20mm thick find the

maximum stress induced in the plate & also the bending

10 Nov 2016



moment which can produce this stress. E=2*10^5 N/mm^2

7

A circular pipe of external diameter 70mm and thickness

10mm is used as a simply supported beam over effective span

of 2.5m. find the maximum point load that can be applied at

the center of span if permissible stress in the tube is

150N/mm^2.

10

Nov 2018

8

A timber beam of rectangular section supports a load of 20KN

UDL over a span of 3.6m.If depth of the beam is twice the

width & maximum stress is not to exceed 7MPa.find the

dimensions of the beam section.

10 Nov 2016/May 2017

9

A beam is simply supported and carries a UDL of 40KN/m

run over the whole span. If section of the beam is rectangular

having depth as 500mm.If the maximum stress in the material

of the beam is 120N/mm^2 & MI is 7*10^8 mm^4.Find the

span of the beam.

10 Nov 2017

10

A rectangular beam 40mm deep is simply supported over a

span of 5m long.what uniformly distributed load the beam

may carry if the bending stress is not to exceed 120MPa?Take

I =9*10^6 mm^4

10 May 2018

11

A circular pipe of external diameter 80mm and thickness

10mm is used as a simply supported beam over an effective

span of 3m.Find the maximum point load that can be applied

at the Centre of the span, if permissible stress of the tube is

150N/mm^2.

10 May 2018

12 Explain moment of resistance & radius of curvature in a beam 5 April 2019

13

A rectangular beam 300mm deep is simply supported over a

span of 4m long. what uniformly distributed load the beam

may carry if the bending stress is not to exceed 120MPa?Take

I =80*10^6 mm^4

10 April 2019



14

A cast iron pipe of external diameter 60mm and 10mm

thickness and 5m long is supported at its end .the pipe carries

a point load of 100N at its center. calculate maximum bending

stress induced in the pipe

10 April 2019

15

A steel plate is bent into an arc of a circle of radius 10 m. If

the breadth of the plate is150 mm and thickness 25 mm and E

= 2 x 105 N/mm

2. Calculate the maximum stress induced in

the plate and the bending moment which can produce this

stress

10 Nov 2019

16

A simply supported wooden beam of span 1.3 m is carrying a central

point load of 40 kN. If the allowable bending stress in the timber is

taken as 8 N/mm2 . Find the breadth and depth of the timber. Take b

= 0.6 d.

10 Nov 2019

UNIT –6 STRAIN ENERGY & IMPACT LOADING

1 Explain Proof resilience & modulus of resilience.

5 Nov 2016/May 2018,

Nov 2019

2 Explain strain Energy & resilience 5 Nov 2017/Nov 2018

3

An axial pull of 20KN is suddenly applied to steel rod 2.5m

long & 1000mm^2 in cross section. calculate the strain energy

which can be stored if E=2*10^5 N/mm^2

5 Dec 2016

4

a)An axial pull of 25KN is suddenly applied to steel rod 2m


which can be stored if E=2*10^5 N/mm^2

5 May 2017

5

b)An axial pull of 50KN is suddenly applied to a rod of 2m

long 40mm diameter .calculate the stress produced & strain

energy that can be stored if E=200KN/mm^2.

5 April 2019

6 Calculate the strain energy stored in a bar 2.5m long 50mm

wide &40mm thick when it is subjected to a tensile load of 50 5 Dec 2017, Nov 2019



KN E=2*10^5 N/mm^2

7

Calculate the strain energy stored in a steel bar 2m long and

500mm^2 cross sectional area when it is subjected to a tensile

stress of 50 Kn/mm^2 E=2*10^5 N/mm^2.

5

NOV 2018

8

Calculate the strain energy stored in a bar 250mm long 40mm

wide &20mm thick when it is subjected to a tensile load of 50

KN E=2*10^5 N/mm^2.

5 May 2018

9 Define:(i)Resilience (ii)Proof Resilience (iii)modulus of

resilience 3 April 2019

10

An axial pull of 20KN is suddenly applied to steel rod 2.5m


which can be stored if E=200GPa

7 April 2019

UNIT – 6 THEORY OF TORSION

1 List the assumptions made in Theory of torsion. 5 May 2017/Nov 2018


2 Write the torsion equation with all notations. 5 May 2017/May 2018

3 Compare the strength of hollow & solid shaft. 5 Nov 2017 April 2019

4

A solid circular shaft is required to transmit 100KW at

180r.p.m. The permissible shear stress in the shaft is

60N/mm^2.Find the suitable diameter of the shaft. The angle

of twist is not to exceed 1degree in a length of 3m.The value

of rigidity modulus is 0.8*10^5 N/mm^2.

10 Nov 2016

5

A steel shaft transmits 105kw at 160rpm.If the shaft is

100mm in diameter and the torque on the shaft & the

maximum shear stress induced. Also find twist of the shaft in

a length of 6m. C=80*10^3 N/mm^2

10 May 2017

6

A solid circular shaft is required to transmit 120KW at

180r.p.m. The permissible shear stress in the shaft is

70N/mm^2.The maximum torque transmitted exceeds the

10 Dec 2017



mean torque by 30%more than the mean torque. Find the

suitable diameter of the shaft. Also find the angle of twist in a

length of 2m.G=0.9*10^5 N/mm^2.

7

A solid shaft of 120mm diameter is required to transmit

200kW at 100rpm .If the angle of twist is not to exceed 2

degrees find the length of the shaft. Take Modulus of

rigidity=90GPa.

10 May 2018

8

A hollow shaft is required to transmit 300KN at 90rpm the

permissible shear stress in the shaft is 60Kn/mm^2. The

maximum torque transmitted exceeds the mean torque by

25% more than the mean torque .the internal diameter is half

of the external diameter. Find the internal diameter and

external diameter of the shaft

10

Nov 2018

9

A solid circular shaft is required to transmit 1MW at

240rpm.the permissible shear stress in the shaft is

60N/mm^2.the angle of twist is not to exceed 1 degree in a

length of 2.5m.the value of rigidity modulus is

80Kn/mm^2.find the diameter of shaft

7 April 2019

10

A solid circular shaft is required to transmit 100 kW at 180 rpm. The

permissible shear stress in the shaft is 60 N/mm2. Find the suitable

diameter of the shaft. The angle of twist is not to exceed 1° in a

length of 3 m. The value of rigidity modulus is 0.8 x 105 N/mm

2.

10 Nov 2019

Mechanics of Machine [15ME32T ]

Question Bank – Unit Wise

Department of Mechanical Engineering, Jain Polytechnic Belagavi

Unit – 1- Simple Mechanism

1 Define Kinematic link. Briefly explain its types 5m

Nov

2017

Apr

2018

2 Explain self-closed pair & force- closed pair / differentiate between self-closed

pair and force closed pair 5m/4

m

Nov

2017

Apr

2017

Apr

2018

3. Explain single slider crank chain with sketch &mention its inversions 10m Nov - 1017

4.

Explain elliptical trammel with neat sketch

5m

Apr - 2017/ Nov - 2017

5. Explain Oldham’s coupling with neat sketch 5m

Apr - 2017/ Nov - 2017

6. Explain with neat sketch crank and slotted lever return motion mechanism

10m

/ 8m

Apr – 2017 / May 19

7. List types of constraint motion. Explain any one 5m Nov - 2016

8 Explain with a neat sketch beam engine 5m/5

Nov -16/Nov-18/Nov-

19

9. Explain with a neat sketch four bar chain 6m

Nov-

Dec

2018

10

.

Differentiate Higher and Lower pair 4m Nov – 2016

11 Explain with neat sketch Scotch yoke mechanism

5

Apr-2018 / Nov 2018

12 Explain with neat sketch completely constrained motion

6

Apr – 2018

13

Explain coupling rod of locomotive with neat sketch

7 Apr-18 / may 19

14 Define Inversion of mechanism

3

Apr – 2018

Mr.Sujit Sali




15 Differentiate between machine and structure

5

Nov/Dec 2018

16

Define inversion of mechanism and list inversion of single slider crank chain / Explain inversion of mechanism

5 / 2 Nov/Dec

2018 May 19

17 Explain pendulum pump with neat sketch 5 Nov/Dec

2018

18 List the types of links. Explain any two 5 May 19

19 Explain mechanism 2 May 19

20 Explain with neat sketch Oldham’s coupling 8 May 19

21 Explain the following types of kinematic pairs. Give one example each. i. Sliding pair ii. Turning pair

5 Nov-19

22

22 Define kinematic chain. Name the different types of kinematic chains 5 Nov-19

23 Explain with neat sketches the three types of constrained motions 5 Nov-19

24 With neat sketch, explain a double slider crank chain, which is used to draw ellipses. 5 Nov-19

Unit – 2- Transmission of Power

1 List advantages and disadvantages of belt drive over rope drive. 5m Nov

2017

2 Explain with neat diagram stepped or cone pulley drive. 5m/5

m

Nov-17

/Nov-19

3

Two parallel shafts that are 3.5m apart are connected by two pulleys of 1m & 400mm diameters. The larger pulley being the driver runs at 220rpm. The belt weights 1.2 kg/m. The maximum tension in the belt is not to exceed 1.8 KN. The coefficient of friction 0.28. Owing to slip on one of the pulley, the velocity of driven shaft is 520rpm. Determine (i) Torque on each shaft (ii) Power transmitted (iii) Power lost.

10m Nov

2017

4 Two spur gears have velocity ratio of 1/3. The driven gear has 72 teeth of 8mm module & rotates at 300rpm. Calculate number of teeth & speed of driver

5m Nov - 2017

5

A compound gear train consist of six gears A,B,C,D,E,F having number of teeth24,56,30,80,32 &72 respectively. The gears B- C & D-E are compound gears. The motor shaft rotating at 500rpm is conducted to gear A & output shaft to gear F. Determine the speed of gear F.

5m Nov - 2017

6 List advantages of flat belt drive over v-belt drive. 5m/5

m

Apr - 17/ Nov-Dec 18/Nov-

19

7

Two parallel shafts, about 600 mm apart are to be connected by spur gears. One shaft is to run at 120 r.p.m. and the other at 360 r.p.m. find the number of teeth on each wheel if the module is 8mm. Also find exact distance apart of two shafts.

5m Apr - 2017

8

An open belt running over two pulleys 240 mm and 600 mm diameter connects two parallel shafts 3 meters apart and transmits 4 kW from the smaller pulley that rotates at 300 r.p.m. Co-efficient of friction between the belt and the pulley is 0.3 and the safe working tension is10N per mm width. Determine: 1. Minimum width of the belt, 2. Initial belt tension and 3. Length of the belt required.

10m Apr - 2017




9 Explain Slip & creep of belt drive. 4m/5

m

Apr – 17/ Nov-19

10

A pulley used to transmit power by means of ropes has a diameter of 3.6 meters and has 15 grooves of 45° angle. The angle of contact is 170° and the coefficient of friction between the ropes and the groove sides is 0.28. The maximum possible tension in the ropes is 960 N and the mass of the rope is 1.5 kg per meter length. Calculate the speed of pulley in r.p.m. and the power transmitted if the condition of maximum power prevail

6m

Apr - 2017

11 What are the types of belt drives? Explain cross belt drive. 5m Nov - 2016

12

An engine, running at 150 r.p.m., drives a line shaft by means of a belt. The engine pulley is 750 mm diameter and the pulley on the line shaft being 450 mm. A 900 mm diameter pulley on the line shaft drives a 150 mm diameter pulley keyed to a dynamo shaft. Calculate the speed of the dynamo shaft, when 1. There is no slip, and 2. There is a slip of 2% at each drive.

5m

Nov - 2016 / Apr - 2018

13 Define : A) Pitch circle. B). Addendum. C).Dedendum. D) Module 4m

Nov - 2016 / Apr - 2018

14

A pulley is driven by a flat belt, the angle of lap being 120°. The belt is 100mm wide by 6 mm thick and density1000 kg/m3. If the coefficient of friction is 0.3 and the maximum stress in the belt is not to exceed 2 MPa, Calculate the greatest power which the belt can transmit and the corresponding speed of the belt.

10m Apr - 2018

15

Two parallel shafts to be connected by spur gearing. The approximate distance between the shafts is 600mm. If one shaft runs at 120rpm and the other at 360rpm, find the number of teeth on each wheel. If the module is 8mm, determine the exact distance apart of the two shafts.

10m

/ 6m

Nov-Dec 2018 / May 19

16

A shaft running at 200rpm. Drives another shaft at 300rpm and transmits 6kW through a belt. The belt is 100 mm wide and 10 mm thick. The distance between the shafts is 4m. The smaller pulley is 0.5 m in diameter. Calculate the stress in the belt, if it is cross belt drive. Take µ=0.3

10m Nov-Dec

2018

17 Explain open belt and cross belt drives

5m Nov-Dec

2018

18

A pulley is driven by a flat belt running at a speed of 600 m/min. The coeff of friction between the pulley and the belt is 0.3 and the angle of lap is 160°. If the max tension in the belt is 700N, find the power transmitted by the belt.

5 May 19

19 Explain with a neat sketch fast and loose pulley drive 5 May 19

20 List the types of flat belt drives 4 May 19

21

Two pulleys, 450 mm dia and other 200 mm diameter are on parallel shafts 1.95 m apart and are connected by a crossed belt. Find the length of the belt required, and the angle of contact between the belt and the pulley. What power can be transmitted by the belt when the larger pulley rotates at 200 rpm, if the maximum permissible tension in the belt is 1 KN, and the coefficient of friction between the belt and pulley is 0.25.

10 May 19

22 Calculate the power transmitted by a belt running over a pulley of 600mm diameter at 200rpm/250rpm. The co-efficient of friction between the belt and the pulley is

5m/5

m

Apr – 18/Nov-




0.25/0.3, angle of lap is 160°/150° and maximum tension in belt is 2500N 19

23 Draw a diagram of compound belt drive and write its velocity ratio along with their notations

5m Nov-19

24 Two parallel shafts, about 50mm apart are to be connected by a spur gears. One shaft is to run at 300 rpm and the other at 100 rpm. Determine the sizes of the gear

5m Nov-19

Unit – 3- Friction

1 Explain with neat sketch friction in journal bearing 5m

Apr - 2017/ Nov - 2017

2

The force required just to move a body on a rough horizontal surface by pulling is 320 N inclined at 30° & by pushing 380N at the same angle. Find the weight of body and coefficient of friction.

10m

Nov

2017

3 Explain with neat sketch, different types of pivot bearing

5m

Nov - 2017

4 Explain internal expanding brake with a neat sketch. 5m

Apr - 2016 / Apr -

2018 / Nov-Dec

18

5 Explain with neat sketch hydraulic type of internal expanding brake. 5m

Apr - 2016 / Apr - 2018

6 Explain with neat sketch single plate/ disc clutch 10m Apr - 2016

7 Explain types of friction 5m

Nov - 2016

8 Explain liming angle of friction with sketch 5m/5

m

Nov – 16/ Nov-

19

9 State the law of solid friction 5m /

4m

Apr - 18/Nov-Dec 2018 / May 19

10

A vertical shaft 150mm in diameter rotating at 100rpm rest on a flat end foot step bearing. The shaft carries a vertical load of 20 kN. Assuming uniform pressure and co-efficient of friction equal to 0.05, calculate power lost in friction.

10m/

5m

Nov-Dec 18/ Nov-

19

11

A multi disc clutch has five plates having four pairs of active friction surfaces. If the intensity of pressure is not to exceed 0.127 N/mm2, find the power transmitted at 500 rpm. The outer and iiner radii of friction surfaces are 125 mm and 75 mm respectively. Assume uniform wear and take co-efficient of friction=0.3

10m Nov-Dec

2018

12 A single plate clutch, with both sides effective, has outer and inner diameters 300 mm and 200 mm respectively. The maximum intensity of pressure at any point in the

10m Apr-18 / May 19




contact surface is not to exceed 0.1 N/mm2. If the coefficient of friction is 0.3, determine the power transmitted by a clutch at a speed 2500rpm.

13

A conical pivot bearing 150 mm/200 mm in diameter has a cone angle of 120°. If the shaft supports an axial load of 20 KN/30 kN and the coeff of friction is 0.03/0.025, find the power lost in friction when the shaft rotates at 200 rpm/140rpm, assuming uniform pressure.

6m/

10m

May 19/ Nov-19

14 Sketch the following pivot and collar bearings i. Flat pivot ii. Conical pivot iii. Truncated pivot iv. Single flat collar v. Multiple flat collar

5m May 19

15 Explain briefly the function of brake 3m May 19

16 Draw a neat diagram of single plate clutch. Name all the parts 5m Nov-19

Unit- 4 – Balancing of rotating masses

1 Explain balancing of rotating parts necessary for high speed engines

5m

Nov-17 / May 19

2

Explain method of balancing of different masses revolving in the same plane or Explain graphical method of balancing of different masses rotating in same plane. / Analytical method.

5m

Nov - 17 / Apr -

17 / Apr- 18 / Nov Dec 18 May 19

3 Explain static and dynamic balancing 5m

Nov -16 / Nov-Dec

18

4 Explain balancing of single revolving mass revolving in the same plane 5m/5

m

Nov – 16/ Nov-

19

5

Three masses of 8kg, 12kg & 15kg attached at radial distance of 80mm, 100mm &60mm respectively to a disc on a shaft are in complete balance. Determine the angular positions of the masses 12kg &15kgrelative to 8kg mass by graphical/ analytical method.

10 Nov-2017

5

Five masses A, B, C,D and E are attached to a shaft and revolve in the same plane. The masses of A is 250N, B is 160 N, C is 210N respectively and their radii of rotations are equal. The angular position of the masses B, C , D and E are 60°, 135°, 2100 and 270° from the mass A. Calculate the magnitude of D and E for complete balance. Solve by Analytical method.

10 Apr - 2017

6

Five masses A, B, C,D and E are attached to a shaft and revolve in the same plane. The masses of A is 20kg, B is 10kg, C is 16kg respectively and their radii of rotations are equal. The angular position of the masses B, C , D and E are 60°, 135°, 2100 and 270° from the mass A. Calculate the magnitude of D and E for complete balance. Solve graphically.

10

Nov-2016

7

Four masses m1, m2, m3 and m4 are 200 kg, 300 kg, 240 kg and 260 kg respectively. The corresponding radii of rotation are 0.2 m, 0.15 m, 0.25 m and 0.3 m respectively and the angles between successive masses are 45°, 75° and135°. Calculate the position and magnitude of the balance mass required, if its radius of rotation is 0.2 m.(Analytical method)

10 Nov -2016

8 Four masses A, B, C and D are attached to a shaft and revolve in the same plane. The 10 Apr 2018




masses are 16kg, 14 kg, 22kg and 20 kg respectively and their radii of rotations are 40 mm, 50 mm, 60 mm and 30 mm. The angular position of the masses B, C and D are 60°, 135° and 270° from the mass A. Calculate the magnitude and position of the balancing mass at a radius of 50 mm

9

Four masses A, B, c and D are attached to a shaft and revolve in the same plane. The masses are 12kg, 10kg, 18kg and 15 kg respectively and their radii of rotations are 40 mm, 50mm, 60mm and 30mm. The angular position of the masses B, C and D are 60°, 135° and 270° from the mass A. Calculate the magnitude and position of the balancing mass at a radius of 100mm (analytical method)

10

Nov- Dec 2018 / May 19

10

Four masses m1, m2, m3 and m4 are 100N, 150N, 120N & 130N respectively. The corresponding radii of rotation are 0.225m, 0.175m, 0.25m and 0.3m respectively and the angles measured from m1 are 45 , 120° and 225°. Calculate the position and magnitude of the balancing mass required if its radius of rotation is 0.3m.

10 Nov-19

11 Explain the balancing of rotating parts necessary for high speed engines 5 Nov-19

Unit- 5 – CAM Mechanism

1 Define CAM terms i) Base circle ii) Pressure angle iii) Trace point iv) Pitch circle v) Stroke of follower

5m/5

m

Nov-16 Apr-17

Nov-Dec 18/ Nov-

19

2 List the types of followers with classification/ Classify different types of followers/ Classify different types of follower motions

5

Nov-17 Apr-18

Nov-Dec 18 / May

19

3 Interpret why a roller follower is preferred over knife edge. 5 Nov

2017

4 Classify different types of cam with neat diagram 5m /6m

Nov-17

/ May

19

5 Explain cam and follower with neat sketches 5 Nov - 2016

6 Construct the displacement and velocity diagram for uniform velocity motion of follower

5 Apr - 2018

7

Draw the profile of CAM operating knife edge follower having a lift of 30mm. The CAM raises the follower with SHM for 150° of the motion followed by a period of dwell for 60°.The follower descends for the next 100° rotation of CAM with uniform velocity, again followed by dwell period.

10 Nov - 2017

8

Construct the CAM profile to suit following CAM shaft dia=40mm, least radius of CAM=25mm, dia of roller= 25mm, Angle of lift= 120°, Angle o fall = 150°, lift of follower = 40mm, number of pauses are two of equal interval between motion. During the lift , the motion is SHM. During the fall the motion is uniform acceleration & deceleration. The speed of CAM shaft is uniform. The lone of stroke of the follower is off-set 12.5mm from 10mm centre of CAM

10 Apr - 2017

9 Draw the profile of cam rotating clockwise with uniform velocity motion for both outward & return stroke of the follower to give motion to knife edge follower. i)

10 Nov - 2016




Follower to move outward through 40mm during 120° of cam rotation ii) follower to dwell for 30° iii) follower to return to its staring position during next 60° of cam rotation iv) follower to dwell for the remaining of the time

10

Construct a cam profile to raise a valve with simple harmonic motion through 50mm in 1/3 of a revolution, keep if fully raised through 1/12 revolution and to lower it with harmonic motion in 1/6 revolution. The valve remains closed during the rest of the revolution. The diameter of the roller is 20 mm and the minimum radius of the cam is 25 mm. The diameter of the camshaft is 25 mm. The axis of the valve rod passes through the axis of the camshaft.

10 Apr-18 / May 19

11

Construct a cam profile to give the following motion to knife-edged follower: (a) outstroke during 60° of cam rotation. (b) Dwells for the next 30° of cam rotation.. (c) Follower returns to its original position during next 60°. (d) Follower dwells for the rest of the rotation. The stroke of the follower is 40mm and minimum radius of cam is 50mm. The follower moves with uniform velocity during outward and return strokes. Draw the profile of the cam when the axis of the follower is offset 20mm towards right from the cam axis

10 Apr-18

12

Draw the CAM profile of a CAM which raises valve with SHM through 30 mm in 1/3 of the revolution, keep it fully raised through 1/12 revolution and it is closed in next 1/3 revolution with SHM. The valve remains closed during the rest of the revolution. The diameter of the roller is 10mm and minimum radius of the CAM is to be 40mm. The axis of the valve rod passes through the axis of the CAM shaft.

10 Nov-Dec

2018

10 Construct the displacement and velocity diagram when the follower moves with uniform velocity.

5 May 19

23 Classify the follower based on i. Surface in contact ii. Type of motion of the follower 5 Nov-19

24

Construct disc cam by using following details: i. Cam rotates in clockwise direction and is used to move a reciprocating roller with SHM for both outstroke and return stroke of the follower in a radial path. ii. Out stroke with maximum displacement of 25mm during 120° of cam rotation. iii. Dwell for 60 of cam rotation. iv. Return stroke with maximum displacement of 2500 during 90 of cam rotation. v. Dwell during remaining 90 of cam rotation. The line of reciprocation of follower passes through the cam shaft axis. The maximum radius of cam is 30mm. The roller diameter is 8mm.

10 Nov-19

25

Construct a cam operating a knife edge follower has the following data i. Follower moves outwards through 40mm during 120 of cam rotaion. ii. Follower dwells for next 30 of cam rotation. iii. Follower returns to its original position during next 60 of cam rotation. Follower dwells for the rest of the rotation. The displacement of the follower is to take place with uniform velocity motion during both the outward and return strokes. The least radius of the cam is 50mm. Draw the profile of the cam when the axis of the follower passes through the axis of the cam shaft.

10 Nov-19

Unit- 6 – Mechanical Vibrations

1 Identify cause and effects of vibrations

5 Nov-17 Apr-18

Nov-Dec 2018

2 Explain with sketch longitudinal & transverse vibration/ Torsional and transverse vibration.

5 Nov – 2017 / May 19

3 Define forced and damped vibration

5 Apr-17 Apr-18

Nov-Dec




18

4 Explain the term whirling speed of shaft / or Critical speed of the shaft

5 Apr - 17 Nov - 16 Nov-Dec

2018

5 Name the types of free vibrations & explain longitudinal vibration. 5 Nov -

2016

6 Explain the types of vibrations 5 Nov -

2016

7 Define, i. Period of vibration or time period ii. Frequency 4 May 19

8 Explain in short free or natural vibrations, forced vibrations and damped vibrations. 6 May 19

9 Explain briefly with neat sketches the longitudinal, transverse vibration. 5 Nov-19

10 Define i. Free vibration ii. Forced vibration 5 Nov-19

MECHANICAL MEASUREMENT- [15ME33T]


Department of mechanical Engineering, Jain Polytechnic Belagavi

Unit – 1- MEASURING INSTRUMENTS-30MARKS

1 Define i) Sensitivity, ii) Accuracy. iii)Calibration iv)) Hysteresis v)

accuracy vi)precision vii)Repeatability

5

Apr-17,Nov-17,Apr-18,

Apr-19, Nov-19

2 Explain with neat sketch snap gauge 5 Apr-17

3 Explain with neat sketch Bevel Protractor 5 Nov-17

4 Explain with neat sketch the use of sine bar 5 Apr-17,Nov-17,Nov-18,

Apr-19

5 Write short notes on CMM 5 Apr-17,Nov-17,Apr-18

6 Explain with neat sketch Talysurf surface roughness tester 5 Apr-17,Nov-16,Nov-18

7 Define Error. Explain Systematic and Random Errors 5 Apr-18,Apr-17,Nov-18,

Apr-19

8 List various factors in selection of measuring instruments. 5 Nov-18

9 List the advantages of Co-ordinate Measuring Machine (CMM) 5 Nov-18

10 Explain with a neat sketch measurements of thread by a thread gauge

micrometer 5 Nov-18, Apr-19

11 Explain calibration procedure of measuring instrument. 5 Apr-19

12 Define Measurement and Explain its requirements. 5 Nov-19

13 Explain calibration procedure of measuring instrument. 5 Nov-19

Unit-2 TRANSDUCERS AND STRAIN GAUGES -30MARKS

1 Explain with neat sketch Berry type strain gauge 5 Nov-17,Apr-18, Nov-19

2 Explain the mounting of strain gauge 5 Nov-17,Apr-18

3 Write the various transducers selection factors 5 Apr-17,Nov-16,Nov-18,

Apr-19

4 Explain with a neat sketch piezoelectric transducer 5 Apr-17,Nov-16

Apr-18,Nov-18, Nov-19

5 Explain briefly the working of optical strain gauge 10 Apr-17,Nov-17

Nov-16,Nov-18, Nov-19

6 Sketch the schematic diagram of the following transducer actuating

mechanisms. i)Corrugated diaphragm ii)Bellows iii) capsule 10 Nov-17,Nov-16, Nov-19

7 Explain with a neat sketch load cell 5 Nov -16

8 State the various transducers selection factors. 5 Apr-18

9 State any 5 requirements of ideal strain gauge 5 Apr-18

10 Explain with a neat sketch of screw thread micrometer 5 Apr-18, Nov-19

11 Explain with a neat sketch a)Plain plug gauge b)Ring gauge 5 Apr-18, Apr-19, Nov-19

12 Define strain gauge and list its purposes. 5 Nov-18, Apr-19

13 List any five types of transducer actuating mechanisms. 5 Nov-18

14 Explain with a neat sketch two element Rossette gauge. 5 Nov-18, Apr-19

15 State advantages and limitations of mechanical strain gauges. 5 Nov-18, Apr-19

16 Explain gauge factor. 5 Nov-17,Nov-18

17 List the various piezo-electric materials. 5 Apr-19

18 Give the classification of strain gauges. 5 Apr-19, Nov-19

19 Explain Strain Gauge Rosettes. 5 Nov-19

20 Explain with a neat sketch measurement of thread by Bench

micrometer 5 Nov-19

Unit-3 measurement of force, torque and pressure-20marks

Prepared by: Ganesh A Kundekar




1 Explain the working of Proving ring and its use 5 Apr-17

2 Explain with neat sketch Spring Balance 5 Apr-17,Apr-18, Apr-19, Nov-19

3 Explain with neat sketch the working of Bourdon tube pressure gauge 5 Apr-17,Nov-17, Apr-19

4 Explain with neat sketch Prony Brake Dynamometer 5 Apr-17,Nov-16 Apr-18,Nov-18, Apr-19

5 Define torque and list various torque measuring instruments 5 Nov-17

6 Explain with a neat sketch the working of Hydraulic Dynamometer 5 Nov-16

7 Define pressure. List the pressure measuring instruments 5 Nov-16

8 Define force. List the force measuring instruments 5 Apr-17,Nov-18, Nov-19

9 Explain with neat sketch the working of Mcloed Gauge and its Use. 10 Nov-19

Unit -4 applied mechanical measurements-25marks

1 With a neat sketch Explain the principle working of thermocouples 5 Apr-17,Nov-17, Apr-

19, Nov-19

2 Explain with a neat sketch of LVDT 5

Apr-17,Nov-17,

Nov-16,Apr-18,Nov-

18, Apr-19

3 Explain with neat sketch Optical pyrometer 5 Apr-17,Nov-17,

Apr-16

4 Explain with a neat sketch Resistance thermometer 5 Apr-17,Nov-17,

Apr-18, Apr-19, Nov-19

5 Explain with a neat sketch the working of Revolution counter 5 Apr-17,Apr-18, Apr-19

6 Describe tachometer and Mention types of mechanical tachometers 5 Nov-17,Nov-16

7 Explain with a neat sketch the working of Rotameter. 5

Nov-16,Nov-17,

Apr-18,Nov-18, Nov-

19

8 Classify the various tachometers 5 Nov-18

9 State the difference between resistance thermometer and

thermocouple. 5 Apr-19

10 State the advantages and Disadvantages of Resistance thermometer 5 Apr-19, Nov-19

11 State the advantages and Disadvantages of LVDT. 5 Nov-19

Unit -5 miscellaneous measurements -15marks

1 Explain the terms a)Humidity b)Density 5 Apr-17,Nov-17, Nov-

19

2 Explain with a neat sketch Hydrometer 5 Apr-17,Nov-17,

Nov-16,Apr-18, Apr-19

3 Write short notes on sphygmomanometer 5 Apr-17,Nov-17,

Nov-16

4 Explain with a neat sketch the principle of float gauge for liquid level

measurement 5 Nov-16,Nov-18

5 Explain with neat sketch of hair hygrometer 5 Apr-18,Nov-18, Apr-

19, Nov-19

6 Explain with neat sketch liquid level measurement by using sight

glass 5 Apr-19, Nov-19

Unit -6 limits, fits, tolerance and testing of geometrics dimensions -25marks




1 Define tolerance and briefly explain its types 5 Apr-17,Nov-18

2 Explain with neat sketch i)clearance fit ii) Interference fit 5 Apr-17,Apr-18,Nov-

18, Apr-19, Nov-19

3 Write short note on selective assembly 5 Apr-17,Nov-18

4 With neat sketch explain Hole Basis system 5 Apr-17

5 Explain with neat sketch checking of run out of axis of centre in lathe 5 Apr-17,Nov-18, Apr-

19, Nov-19

6 Define Interchangeability. State its importance 5 Apr-16,Nov-18

7 Distinguish Hole Basis System and Shaft Basis System 5 Nov-17,Nov-16

Apr-18,Nov-18, Apr-

19, Nov-19

8 Explain with neat sketch he procedure for checking the

parallelism of spindle axis to carriage movement in lathe. 10 Nov-17,Apr-18,Nov-18

9 Differentiate between unilateral and Bilateral tolerance 5 Nov-16, Nov-19

10 Define the following terms

a)Deviation b)tolerance c)tolerance zone d)limit e)Actual size 5 Nov-17, Apr-19

11 List the various types of testing equipment used for machine tool

alignment test 5 Apr-18, Apr-19, Nov-19

MACHINE DRAWING [15ME34D ]



Unit – 1- Conventional Representations

1 a. Draw the conventional representation of the following materials

i) Zink ii) Fiber iii) Aluminium 9m

Nov 2016

b. Draw the conventional representation of the following sections.

i) Splined Shaft ii) Chain Wheel 6m


i) Glass ii) Concrete iii) Rubber 9m

Apr 2017


i) Spur Gear ii) Bevel Gears 6m

3 a. Draw the conventional representation of the following materials.

i) Internal Theads ii) Chain Wheels iii) Ratchet & Pinion 9m

Nov 2017


(i) Top-half in section (ii)Left – half in section 6m


i) Glass ii) Steel iii) Flywood 9m

Apr 2018 b.

Draw the conventional representation of the following sections.

(i) Knurling operation (ii) Spocket wheel 6m

5 a. Draw the conventional representation of following materials.

i) Glass ii) Porcelain iii) Aluminium 6m

Nov-Dec

2018

b.

Draw the conventional representation of following machine elements.

i) Bevel Gear ii) Rack and Pinion iii) Compression spring with square

section

9m Nov-Dec

2018

6

(a) Draw me conventional representation of the following materials :

(i) Wood (ii) Steel (iii) Rubber

(b) Draw the conventional representation of the following :

(c) i) Knurling (ii) Spur gear

15 April/May-

2019

7 Draw the conventional representation of the following materials

i) Steel ii) Wood iii) Concrete 9 Nov 2019

8 Draw the conventional representation of the following sections.

(i) Top-half in section (ii)Rightt – half in section 6 Nov 2019

Prepared by: Gajanan Desurkar




Unit – 2- NUT & BOLTS

1

Draw the front, top & side views of a ISO threaded hexagonal head

bolt & nut in the engaged position. The length of the bolt is 120mm,

the threaded length is 60mm. The diameter of the bolt is 24mm across

corner. Indicate all the properties & the actual dimensions.

15m Nov 2016,

Nov 2019

2

Draw the front and top view of ISO threaded Square bolt and

Nut of 100 mm long with a threaded length of 50mm. The diameter

of the bolt is 20 mm across Flat

15m Apr 2017

3

Draw the three views of ISO threaded Hexagonal bolt of 100 mm

long , 20 mm dia & a threaded length of 50mm. & Hexagonal nut in

the axis horizontal position. Indicate all the properties & the actual

dimensions.

15m Nov 2017

4

Draw the three views of a threaded Hexagonal bolt of diameter 35 mm

of shank length of 90 mm. & threaded length 50mm. Draw front view

so as to view all three surfaces.

15m Apr 2018

5

Draw three views of ISO threaded hexagonal bolt 100mm long, 20mm

diameter and thread length of 60mm and hexagonal nut assembly in

the axis horizontal position (Scale 1:1)

15m Nov-Dec

2018

6

Draw the front, top and side views of an ISO threaded hexagonal

headed bolt and nut in engaged position. The length of the bolt is 100

mm and threaded length is 50 mm.The diameter of the bolt is 20 mm

15 Apr 2019

Unit – 3- RIVETTED JOINTS

1

Draw to 1:1 scale the sectional front view and top view of a double

riveted Butt joint with double cover plate with change Zig-zag

riveting. The thickness of the plate is 12 mm. Use snap head rivets and

show at least three rivets. Indicate all the dimensions.

Thickness of Plate (t) - 9 10 11 12 14 16 18

Diameter of Rivets (d)- 18 19 20 21 22 24 26

15m Nov 2016




2

Draw to 1:1 scale the sectional front view and top view of a double

riveted lap joint with Chain riveting .The thickness of the plate is

16mm. Use snap head rivets and show at least three rivets. Indicate all

the dimensions.

15m Apr 2017

3

Draw the 1:1 scale, Top view & sectional front view of a single

riveted butt joint with a single cover plate. The thickness of plate is

9mm. Show at least three rivets in each. Indicate all dimensions & use

snap head rivets.

15m Nov 2017

4

Draw to 1:1 scale the sectional front view and top view of a single

cover plate single riveted butt joint for a plate of thickness 9mm. show

at least three rivets. Use snap head rivets. Indicate all the dimensions.

15m Apr 2018

5

Draw 1:1 scale the sectional front and top views of a single riveted butt

joint with double cover plate chain riveting. The thickness of plate is

10mm. Use snap head rivets and show at least three rivets in each row.

Indicate all dimensions

15m Nov-Decc

2018

6

Draw to 1 : 1 scale the sectional front view and top view of a double

riveted butt joint with double cover plate with chain riveting. The

thickness of the plate is 9 mm. Use snap head rivets and show at least

three rivets. Indicate all dimensions

15 Apr 2019

7

Draw 1:1 scale the sectional front and top views of a single riveted butt

joint with double cover plates. The thickness of plate is 9 mm. Use

snap head rivets and show at least three rivets in each row. Indicate all

dimensions

15 Nov 2019

Unit- 4 - LIMITS, FITS AND TOLERANCES

1 Draw the diagrammatic representation of the following

(i)Clearance fit (ii) Interference fit (iii) Transition fit 15m

Nov 2016,

Apr 2017,

Nov 2017,

Apr 2018

Apr 2019,

Nov 2019




2 A shaft of 20mm basic size is given as 20 +_ 0.02 mm. Find the

tolerance 5m Nov 2017

3

Draw the diagrammatic representation of the following

i) Clearance fit ii) Interference fit iii) Transition fit iv) Unilateral

tolerance v) Bilateral tolerance

15m Nov-Dec

2018

Unit- 5 - ASSEMBLY

1 Assembly of KNUCKLE JOINT

& Show (i) Front view (ii) Right view iii) Top view

45+25

=70m

Nov 2016,

Apr 2018

2 Assembly of SOCKET & SPIGOT COTTER JOINT

& Show (i) Front view (ii) Top view iii) Right view

45+25

=70m Apr 2017

3 Assembly of PLUMMER BLOCK

& Show (i) Front view with Right half in section (ii) Top view

45+25

=70m Nov 2017

4

Assembly of UNIVERSAL COUPLING

& Show (i) Full sectional front view (ii) Top view (iii) Left side

view

70m Nov-Dec

2018

5

Assembly of a PROTECTED TYPE FLANGED COUPLING

(i) Front view with top half in section.

(ii) Left side view.

45+25=70 Apr 2019

6

The detail parts of a SCREW JACK is given, Assemble the parts and

show the following views to 1:1 scale. Show the important dimensions

on the assembly Drawing

(i)Front view with right half in section

(ii) Top view

70 Nov 2019

Prepared by: Gajanan Desurkar STRENGTH OF MATERIALS …

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