IES/ESE Paper (Mechanical) - 2007 | GATE, ISRO & IES/ESE Previous Year Solved Papers - Mechanical Engineering PDF Download

 Page 1


 1 of 14
 
 
PAPER–II 
 
1. Match List - I with List - II and select, the 
correct answer using the code given below 
the lists 
List I (Application) 
A. Boiler Shell 
B. Marine Shaft Coupling 
C. Crosshead and Piston Rod 
D. Automobile gear box (gears to shaft) 
List - II (Joint) 
1. Cotter Joint 
2. Knuckle Joint 
3. Riveted joint 
4. Splines 
5. Bolted Joint 
Codes; 
A B C  D 
a.   1 4 2 5 
b.   3 5 1 4 
c.   1 5 2 4 
d.   3 4 1 5 
2. A single parallel fillet weld of total length 
L and weld size h subjected to a tensile 
load P, will have what design stress? 
a. Tensile and equal to 
0.707
p
Lh
 
b. Tensile and equal to 
p
Lh
 
c. Shear and equal to 
0.707
p
Lh
 
d. Shear and equal to 
p
Lh
 
3. How can shock absorbing of a belt be 
increased? 
a. By tightening it properly  
b. By increasing the shank 
c. By grinding the shank 
d. By making the shank equal to the core 
diameter 
4. How is the type of a railway wheel fitted? 
a. By seam welding 
b. By fillet welding 
c. By interference fit 
d. None of the above 
5. Consider the following statements in case 
of belt drives: 
1. Centrifugal tension in belt increases 
the transmitted 
2. Centrifugal tension does affect the 
driving tension 
3. Maximum tension in the belt is always 
three times the driving tension 
Which of the statements given above is/are 
correct? 
a. 1, 2 and 3  
b. 2 and 3 only 
c. 1 and 3 only  
d. 1 only 
6. The maximum efficiency of a screw jack 
having square threads with friction angle ? 
is: 
a. 
? ?
??
1tan /2
1tan /2
?
?
?
?
 
b. 
1tan
1tan
?
?
?
?
 
c. 
1sin
1sin
?
?
?
?
 
d. 
? ?
??
1sin /2
1sin /2
?
?
?
?
 
7. In designing a shaft for variable loads, the 
S.N. diagram can be drawn by: 
a. Joining the S
ut
 at 0 cycles and S
e
 at 10
6
 
cycles by a straight line on an S.N. 
graph 
b. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph 
c. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on an 
S.N. graph 
d. Joining the S
ut
 at 1000 cycles and 0.9 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph  
I.E.S. (OBJ) - 2007 
M ME EC CH HA AN NI IC CA AL L  E EN NG GI IN NE EE ER RI IN NG G  
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Page 2


 1 of 14
 
 
PAPER–II 
 
1. Match List - I with List - II and select, the 
correct answer using the code given below 
the lists 
List I (Application) 
A. Boiler Shell 
B. Marine Shaft Coupling 
C. Crosshead and Piston Rod 
D. Automobile gear box (gears to shaft) 
List - II (Joint) 
1. Cotter Joint 
2. Knuckle Joint 
3. Riveted joint 
4. Splines 
5. Bolted Joint 
Codes; 
A B C  D 
a.   1 4 2 5 
b.   3 5 1 4 
c.   1 5 2 4 
d.   3 4 1 5 
2. A single parallel fillet weld of total length 
L and weld size h subjected to a tensile 
load P, will have what design stress? 
a. Tensile and equal to 
0.707
p
Lh
 
b. Tensile and equal to 
p
Lh
 
c. Shear and equal to 
0.707
p
Lh
 
d. Shear and equal to 
p
Lh
 
3. How can shock absorbing of a belt be 
increased? 
a. By tightening it properly  
b. By increasing the shank 
c. By grinding the shank 
d. By making the shank equal to the core 
diameter 
4. How is the type of a railway wheel fitted? 
a. By seam welding 
b. By fillet welding 
c. By interference fit 
d. None of the above 
5. Consider the following statements in case 
of belt drives: 
1. Centrifugal tension in belt increases 
the transmitted 
2. Centrifugal tension does affect the 
driving tension 
3. Maximum tension in the belt is always 
three times the driving tension 
Which of the statements given above is/are 
correct? 
a. 1, 2 and 3  
b. 2 and 3 only 
c. 1 and 3 only  
d. 1 only 
6. The maximum efficiency of a screw jack 
having square threads with friction angle ? 
is: 
a. 
? ?
??
1tan /2
1tan /2
?
?
?
?
 
b. 
1tan
1tan
?
?
?
?
 
c. 
1sin
1sin
?
?
?
?
 
d. 
? ?
??
1sin /2
1sin /2
?
?
?
?
 
7. In designing a shaft for variable loads, the 
S.N. diagram can be drawn by: 
a. Joining the S
ut
 at 0 cycles and S
e
 at 10
6
 
cycles by a straight line on an S.N. 
graph 
b. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph 
c. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on an 
S.N. graph 
d. Joining the S
ut
 at 1000 cycles and 0.9 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph  
I.E.S. (OBJ) - 2007 
M ME EC CH HA AN NI IC CA AL L  E EN NG GI IN NE EE ER RI IN NG G  
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 2 of 14
(S
ut
 stands for ultimate tensile strength and 
S
e
 for the endurance limit) 
8. Match List - I with List - II and select the 
correct answer using the code given below 
the lists 
List-I 
A. Worm gear 
B. Spur gear 
C. Herringbone gear 
D. Spiral level gear 
List II 
1. Imposes no thrust load on the shaft 
2. To transmit power between two non-
intersecting shafts which are 
perpendicular to each other 
3. To transmit power when the shafts are 
parallel 
4. To transmit power when the shafts are 
at right angles to one another 
Codes; 
 A B C D 
a.   1 2 3 4 
b.   2 3 1 4 
c.   1 2 4 3 
d.   2 3 4 1 
9. The velocity ratio between pinion and gear 
in a gear drive is 2.3, the module of teeth 
is 2.0 mm and sum of number of teeth on 
pinion and gear is 99. What is the centre 
distance between pinion and the gear? 
a. 49.5 mm  
b. 99 m 
c. 148.5mm  
d. 198 mm 
10. Compared to gears with 200 pressure 
angle involutes full depth teeth, those with 
200 pressure angle and stub teeth have 
1. smaller addendum  
2. smaller dedendum 
3. smaller tooth thickness  
4. greater bending strength 
Which of the statements given above are 
correct? 
a. 1, 2 and 3 
b. 1, 2 and 4 
c. 1, 3 and 4 
d. 2, 3 and 4 
11. A hollow shaft of outer dia 40 mm and 
inner dia of 20 mm is to be replaced by a 
solid shaft to transmit the same torque at 
the same maximum stress. What should be 
the diameter of the solid shaft? 
a. 30 mm  
b. 35 mm 
c. 10 × (60)
1/3
 mm  
d. 10 × (20)
1/3
 mm 
12. Consider the following statements: 
For a journal rotating in a bearing under 
film lubrication conditions, the frictional 
resistance is 
1. proportional to the area of contact 
2. proportional to the viscosity of 
lubricant 
3. proportional to the speed of rotation 
4. independent of the pressure 
Which of the statements given above are 
correct? 
a. 1, 2, 3 and 4  
b. 1 and 4 only 
c. 2, 3 and 4 only  
d. 2 and 3 only 
13. Increase in values of which of the 
following results in an increase of the 
coefficient of friction in a hydrodynamic 
bearing? 
1. Viscosity of the oil. 
2. Clearance between shaft and bearing. 
3. Shaft speed 
Select the correct answer• using thc code 
given below 
a. 1 and 2 only  
b. 1 and 3 only 
c. 2 and 3 only  
d. 1, 2 and 3 
14. Average values of effective coefficients of 
friction for bearings are described below: 
1. Spherical ball bearing — f
1
 
2. Cylindrical roller bearing — f
2
 
3. Taper roller bearing — f
3
 
4. Stable (thick film) sliding contact 
bearing — f
4
 
Which one of the following sequences is 
correct? 
a. 
12 3 4
f ff f ? ?? 
b. 
12 4 3
f fff ? ?? 
c. 
21 3 4
f ff f ? ?? 
d. 
14 2 3
f fff ? ?? 
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Page 3


 1 of 14
 
 
PAPER–II 
 
1. Match List - I with List - II and select, the 
correct answer using the code given below 
the lists 
List I (Application) 
A. Boiler Shell 
B. Marine Shaft Coupling 
C. Crosshead and Piston Rod 
D. Automobile gear box (gears to shaft) 
List - II (Joint) 
1. Cotter Joint 
2. Knuckle Joint 
3. Riveted joint 
4. Splines 
5. Bolted Joint 
Codes; 
A B C  D 
a.   1 4 2 5 
b.   3 5 1 4 
c.   1 5 2 4 
d.   3 4 1 5 
2. A single parallel fillet weld of total length 
L and weld size h subjected to a tensile 
load P, will have what design stress? 
a. Tensile and equal to 
0.707
p
Lh
 
b. Tensile and equal to 
p
Lh
 
c. Shear and equal to 
0.707
p
Lh
 
d. Shear and equal to 
p
Lh
 
3. How can shock absorbing of a belt be 
increased? 
a. By tightening it properly  
b. By increasing the shank 
c. By grinding the shank 
d. By making the shank equal to the core 
diameter 
4. How is the type of a railway wheel fitted? 
a. By seam welding 
b. By fillet welding 
c. By interference fit 
d. None of the above 
5. Consider the following statements in case 
of belt drives: 
1. Centrifugal tension in belt increases 
the transmitted 
2. Centrifugal tension does affect the 
driving tension 
3. Maximum tension in the belt is always 
three times the driving tension 
Which of the statements given above is/are 
correct? 
a. 1, 2 and 3  
b. 2 and 3 only 
c. 1 and 3 only  
d. 1 only 
6. The maximum efficiency of a screw jack 
having square threads with friction angle ? 
is: 
a. 
? ?
??
1tan /2
1tan /2
?
?
?
?
 
b. 
1tan
1tan
?
?
?
?
 
c. 
1sin
1sin
?
?
?
?
 
d. 
? ?
??
1sin /2
1sin /2
?
?
?
?
 
7. In designing a shaft for variable loads, the 
S.N. diagram can be drawn by: 
a. Joining the S
ut
 at 0 cycles and S
e
 at 10
6
 
cycles by a straight line on an S.N. 
graph 
b. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph 
c. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on an 
S.N. graph 
d. Joining the S
ut
 at 1000 cycles and 0.9 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph  
I.E.S. (OBJ) - 2007 
M ME EC CH HA AN NI IC CA AL L  E EN NG GI IN NE EE ER RI IN NG G  
www.estudentzone.com
www.estudentzone.com
 2 of 14
(S
ut
 stands for ultimate tensile strength and 
S
e
 for the endurance limit) 
8. Match List - I with List - II and select the 
correct answer using the code given below 
the lists 
List-I 
A. Worm gear 
B. Spur gear 
C. Herringbone gear 
D. Spiral level gear 
List II 
1. Imposes no thrust load on the shaft 
2. To transmit power between two non-
intersecting shafts which are 
perpendicular to each other 
3. To transmit power when the shafts are 
parallel 
4. To transmit power when the shafts are 
at right angles to one another 
Codes; 
 A B C D 
a.   1 2 3 4 
b.   2 3 1 4 
c.   1 2 4 3 
d.   2 3 4 1 
9. The velocity ratio between pinion and gear 
in a gear drive is 2.3, the module of teeth 
is 2.0 mm and sum of number of teeth on 
pinion and gear is 99. What is the centre 
distance between pinion and the gear? 
a. 49.5 mm  
b. 99 m 
c. 148.5mm  
d. 198 mm 
10. Compared to gears with 200 pressure 
angle involutes full depth teeth, those with 
200 pressure angle and stub teeth have 
1. smaller addendum  
2. smaller dedendum 
3. smaller tooth thickness  
4. greater bending strength 
Which of the statements given above are 
correct? 
a. 1, 2 and 3 
b. 1, 2 and 4 
c. 1, 3 and 4 
d. 2, 3 and 4 
11. A hollow shaft of outer dia 40 mm and 
inner dia of 20 mm is to be replaced by a 
solid shaft to transmit the same torque at 
the same maximum stress. What should be 
the diameter of the solid shaft? 
a. 30 mm  
b. 35 mm 
c. 10 × (60)
1/3
 mm  
d. 10 × (20)
1/3
 mm 
12. Consider the following statements: 
For a journal rotating in a bearing under 
film lubrication conditions, the frictional 
resistance is 
1. proportional to the area of contact 
2. proportional to the viscosity of 
lubricant 
3. proportional to the speed of rotation 
4. independent of the pressure 
Which of the statements given above are 
correct? 
a. 1, 2, 3 and 4  
b. 1 and 4 only 
c. 2, 3 and 4 only  
d. 2 and 3 only 
13. Increase in values of which of the 
following results in an increase of the 
coefficient of friction in a hydrodynamic 
bearing? 
1. Viscosity of the oil. 
2. Clearance between shaft and bearing. 
3. Shaft speed 
Select the correct answer• using thc code 
given below 
a. 1 and 2 only  
b. 1 and 3 only 
c. 2 and 3 only  
d. 1, 2 and 3 
14. Average values of effective coefficients of 
friction for bearings are described below: 
1. Spherical ball bearing — f
1
 
2. Cylindrical roller bearing — f
2
 
3. Taper roller bearing — f
3
 
4. Stable (thick film) sliding contact 
bearing — f
4
 
Which one of the following sequences is 
correct? 
a. 
12 3 4
f ff f ? ?? 
b. 
12 4 3
f fff ? ?? 
c. 
21 3 4
f ff f ? ?? 
d. 
14 2 3
f fff ? ?? 
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 3 of 14
15. Which one of the following expresses the 
total elongation of a bar of length L with a 
constant cross-section of A and modulus 
of Elasticity E hanging vertically and 
subject to its own weight W? 
a. 
WL
AE
 
b. 
2
WL
AE
 
c. 
2WL
AE
 
d. 
4
WL
AE
 
16. In a strained material one of the principal 
stresses is twice the other. The maximum 
shear stress in the same case is ?
max
. Then, 
what is the value of the maximum 
principle stress? 
a. ?
max
 
b. 2 ?
max
 
c. 4 ?
max
 
d. 8 ?
max
 
17. For a general two dimensional stress 
system, what are the coordinates of the 
centre of Mohr’s circle? 
a. 
? ?
,0
2
xy
?? ?
 
b. 
? ?
0,
2
x y
? ? ?
 
c. ,0
2
xy
?? ? ??
??
??
 
d. 
? ?
0,
2
x y
? ? ?
 
18. If the ratio G/E (G = Rigidity modulus, E 
= Young’s modulus of elasticity) is 0.4, 
then what is the value of the Poisson ratio? 
a. 0.20 
b. 0.25 
c. 0.30  
d. 0.33 
19. What are the materials which show 
direction dependent properties, called? 
a. Homogeneous materials  
b. Viscoelastic materials 
c. Isotropic materials  
d. Anisotropic materials 
20. What is the phenomenon of progressive 
extension of the material i.e., strain 
increasing with the time at a constant load, 
called? 
a. Plasticity  
b. Creeping  
c. Yielding 
d. Breaking 
21. Which one of the following statements is 
correct? 
If a material expands freely due to heating, 
it will develop 
a. thermal stress  
b. tensile stress 
c. compressive stress 
d. no stress 
22. A cantilever beam of 2 m length supports a 
triangularly distributed load over its entire 
length, the maximum of which is at the 
free end. The total load is 37.5 kN. What is 
the bending moment at the fixed end? 
a. 50 × 10
6 
N mm  
b. 125 × 10
6 
N mm 
c. 100 × 10
6 
N mm 
d. 25 × 10
6
 N mm 
23. Which one of the following statements is 
correct? 
A beam is said to be of uniform strength, if 
a. the bending moment is the same 
throughout the beam 
b. the shear stress is the same throughout 
the beam 
c. the deflection is the same throughout 
the beam 
d. the bending stress is the same at every 
section along its longitudinal axis 
24. Which one of the following statements is 
correct? 
When a rectangular section beam is loaded 
transversely along the length, shear stress 
develops on 
a. top fibre of rectangular beam 
b. middle fibre of rectangular beam 
c. bottom fibre of rectangular beam 
d. every horizontal plane 
25. The diameter of a solid shaft is D. The 
inside and outside diameters of a hollow 
shaft of same material and length are 
D/ 3 and 2D / 3 respectively. What is 
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Page 4


 1 of 14
 
 
PAPER–II 
 
1. Match List - I with List - II and select, the 
correct answer using the code given below 
the lists 
List I (Application) 
A. Boiler Shell 
B. Marine Shaft Coupling 
C. Crosshead and Piston Rod 
D. Automobile gear box (gears to shaft) 
List - II (Joint) 
1. Cotter Joint 
2. Knuckle Joint 
3. Riveted joint 
4. Splines 
5. Bolted Joint 
Codes; 
A B C  D 
a.   1 4 2 5 
b.   3 5 1 4 
c.   1 5 2 4 
d.   3 4 1 5 
2. A single parallel fillet weld of total length 
L and weld size h subjected to a tensile 
load P, will have what design stress? 
a. Tensile and equal to 
0.707
p
Lh
 
b. Tensile and equal to 
p
Lh
 
c. Shear and equal to 
0.707
p
Lh
 
d. Shear and equal to 
p
Lh
 
3. How can shock absorbing of a belt be 
increased? 
a. By tightening it properly  
b. By increasing the shank 
c. By grinding the shank 
d. By making the shank equal to the core 
diameter 
4. How is the type of a railway wheel fitted? 
a. By seam welding 
b. By fillet welding 
c. By interference fit 
d. None of the above 
5. Consider the following statements in case 
of belt drives: 
1. Centrifugal tension in belt increases 
the transmitted 
2. Centrifugal tension does affect the 
driving tension 
3. Maximum tension in the belt is always 
three times the driving tension 
Which of the statements given above is/are 
correct? 
a. 1, 2 and 3  
b. 2 and 3 only 
c. 1 and 3 only  
d. 1 only 
6. The maximum efficiency of a screw jack 
having square threads with friction angle ? 
is: 
a. 
? ?
??
1tan /2
1tan /2
?
?
?
?
 
b. 
1tan
1tan
?
?
?
?
 
c. 
1sin
1sin
?
?
?
?
 
d. 
? ?
??
1sin /2
1sin /2
?
?
?
?
 
7. In designing a shaft for variable loads, the 
S.N. diagram can be drawn by: 
a. Joining the S
ut
 at 0 cycles and S
e
 at 10
6
 
cycles by a straight line on an S.N. 
graph 
b. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph 
c. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on an 
S.N. graph 
d. Joining the S
ut
 at 1000 cycles and 0.9 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph  
I.E.S. (OBJ) - 2007 
M ME EC CH HA AN NI IC CA AL L  E EN NG GI IN NE EE ER RI IN NG G  
www.estudentzone.com
www.estudentzone.com
 2 of 14
(S
ut
 stands for ultimate tensile strength and 
S
e
 for the endurance limit) 
8. Match List - I with List - II and select the 
correct answer using the code given below 
the lists 
List-I 
A. Worm gear 
B. Spur gear 
C. Herringbone gear 
D. Spiral level gear 
List II 
1. Imposes no thrust load on the shaft 
2. To transmit power between two non-
intersecting shafts which are 
perpendicular to each other 
3. To transmit power when the shafts are 
parallel 
4. To transmit power when the shafts are 
at right angles to one another 
Codes; 
 A B C D 
a.   1 2 3 4 
b.   2 3 1 4 
c.   1 2 4 3 
d.   2 3 4 1 
9. The velocity ratio between pinion and gear 
in a gear drive is 2.3, the module of teeth 
is 2.0 mm and sum of number of teeth on 
pinion and gear is 99. What is the centre 
distance between pinion and the gear? 
a. 49.5 mm  
b. 99 m 
c. 148.5mm  
d. 198 mm 
10. Compared to gears with 200 pressure 
angle involutes full depth teeth, those with 
200 pressure angle and stub teeth have 
1. smaller addendum  
2. smaller dedendum 
3. smaller tooth thickness  
4. greater bending strength 
Which of the statements given above are 
correct? 
a. 1, 2 and 3 
b. 1, 2 and 4 
c. 1, 3 and 4 
d. 2, 3 and 4 
11. A hollow shaft of outer dia 40 mm and 
inner dia of 20 mm is to be replaced by a 
solid shaft to transmit the same torque at 
the same maximum stress. What should be 
the diameter of the solid shaft? 
a. 30 mm  
b. 35 mm 
c. 10 × (60)
1/3
 mm  
d. 10 × (20)
1/3
 mm 
12. Consider the following statements: 
For a journal rotating in a bearing under 
film lubrication conditions, the frictional 
resistance is 
1. proportional to the area of contact 
2. proportional to the viscosity of 
lubricant 
3. proportional to the speed of rotation 
4. independent of the pressure 
Which of the statements given above are 
correct? 
a. 1, 2, 3 and 4  
b. 1 and 4 only 
c. 2, 3 and 4 only  
d. 2 and 3 only 
13. Increase in values of which of the 
following results in an increase of the 
coefficient of friction in a hydrodynamic 
bearing? 
1. Viscosity of the oil. 
2. Clearance between shaft and bearing. 
3. Shaft speed 
Select the correct answer• using thc code 
given below 
a. 1 and 2 only  
b. 1 and 3 only 
c. 2 and 3 only  
d. 1, 2 and 3 
14. Average values of effective coefficients of 
friction for bearings are described below: 
1. Spherical ball bearing — f
1
 
2. Cylindrical roller bearing — f
2
 
3. Taper roller bearing — f
3
 
4. Stable (thick film) sliding contact 
bearing — f
4
 
Which one of the following sequences is 
correct? 
a. 
12 3 4
f ff f ? ?? 
b. 
12 4 3
f fff ? ?? 
c. 
21 3 4
f ff f ? ?? 
d. 
14 2 3
f fff ? ?? 
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 3 of 14
15. Which one of the following expresses the 
total elongation of a bar of length L with a 
constant cross-section of A and modulus 
of Elasticity E hanging vertically and 
subject to its own weight W? 
a. 
WL
AE
 
b. 
2
WL
AE
 
c. 
2WL
AE
 
d. 
4
WL
AE
 
16. In a strained material one of the principal 
stresses is twice the other. The maximum 
shear stress in the same case is ?
max
. Then, 
what is the value of the maximum 
principle stress? 
a. ?
max
 
b. 2 ?
max
 
c. 4 ?
max
 
d. 8 ?
max
 
17. For a general two dimensional stress 
system, what are the coordinates of the 
centre of Mohr’s circle? 
a. 
? ?
,0
2
xy
?? ?
 
b. 
? ?
0,
2
x y
? ? ?
 
c. ,0
2
xy
?? ? ??
??
??
 
d. 
? ?
0,
2
x y
? ? ?
 
18. If the ratio G/E (G = Rigidity modulus, E 
= Young’s modulus of elasticity) is 0.4, 
then what is the value of the Poisson ratio? 
a. 0.20 
b. 0.25 
c. 0.30  
d. 0.33 
19. What are the materials which show 
direction dependent properties, called? 
a. Homogeneous materials  
b. Viscoelastic materials 
c. Isotropic materials  
d. Anisotropic materials 
20. What is the phenomenon of progressive 
extension of the material i.e., strain 
increasing with the time at a constant load, 
called? 
a. Plasticity  
b. Creeping  
c. Yielding 
d. Breaking 
21. Which one of the following statements is 
correct? 
If a material expands freely due to heating, 
it will develop 
a. thermal stress  
b. tensile stress 
c. compressive stress 
d. no stress 
22. A cantilever beam of 2 m length supports a 
triangularly distributed load over its entire 
length, the maximum of which is at the 
free end. The total load is 37.5 kN. What is 
the bending moment at the fixed end? 
a. 50 × 10
6 
N mm  
b. 125 × 10
6 
N mm 
c. 100 × 10
6 
N mm 
d. 25 × 10
6
 N mm 
23. Which one of the following statements is 
correct? 
A beam is said to be of uniform strength, if 
a. the bending moment is the same 
throughout the beam 
b. the shear stress is the same throughout 
the beam 
c. the deflection is the same throughout 
the beam 
d. the bending stress is the same at every 
section along its longitudinal axis 
24. Which one of the following statements is 
correct? 
When a rectangular section beam is loaded 
transversely along the length, shear stress 
develops on 
a. top fibre of rectangular beam 
b. middle fibre of rectangular beam 
c. bottom fibre of rectangular beam 
d. every horizontal plane 
25. The diameter of a solid shaft is D. The 
inside and outside diameters of a hollow 
shaft of same material and length are 
D/ 3 and 2D / 3 respectively. What is 
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the ratio of the weight of the hollow shaft 
to that of the solid shaft? 
a. 1 : 1  
b. 1 : 4 
c. 1 : 2  
d. 1 : 3 
26. Which one of the following statements is 
correct? 
If a helical spring is halved in length, its 
spring stiffness 
a. remains same  
b. halves 
c. doubles  
d. triples 
27. A solid circular shaft is subjected to a 
bending moment M and twisting moment 
T. What is the equivalent twisting moment 
Te which will produce the same maximum 
shear stress as the above combination? 
a. 
22
M T ? 
b. M T ? 
c. 
22
M T ? 
d. M T ? 
28. Consider the following statements: 
In a thick walled cylindrical pressure 
vessel subjected to internal pressure, the 
tangential and radial stresses are 
1. minimum at outer side. 
2. minimum at inner side. 
3. maximum at inner side & both reduce 
to zero at outer wall. 
4. maximum at inner wall but the radial 
stress reduces to zero at outer wall. 
Which of the statements given above is/are 
correct? 
a. 1 and 2 
b. 1 and 3 
c. 1 and 4  
d. 4 only 
29. Match List - I with List -II and select the 
correct answer using the code given below 
the lists 
List - I (Long Column) 
A. Both ends hinged 
B. One end fixed, and other end free 
C. Both ends fixed 
D. One end fixed, and other end hinged 
List - II (Critical Load) 
1. ?
2 
EI/4l
2
 
2. 4 ?
2 
EI/l
2
 
3. 2 ?
2 
EI/l
2
 
4. ?
2 
EI/l
2
 
Codes; 
 A B C D 
a.   2 1 4 3 
b.   4 1 2 3 
c.   2 3 4 1 
d.   4 3 2 1 
30. Which one of the following is the correct 
ascending order of packing density for the 
given crystal structures of metals? 
a. Simple cubic — Face centred cubic — 
Body centred cubic 
b. Body centred cubic — Simple cubic — 
Face centred cubic 
c. Simple cubic — Body centred cubic — 
Face centred cubic 
d. Body centred cubic — Face centred 
cubic — Simple cubic 
31. Vibration damping in machinery is best 
achieved by means of base structures made 
of which one of the following materials? 
a. Low carbon steel  
b. Nodular iron 
c. Grey cast iron  
d. White cast iron 
32. For a Rhombohedral space lattice, which 
one of the following is correct? 
a. 90 ? ?? ? ?? ? 
b. 90 ? ?? ? ?? ? 
c. 90 ??? ? ??? 
d. 90 ? ?? ? ?? ? 
33. Match List - I with List - II and select the 
correct answer using the code given below 
the lists: 
List - I (Component) 
A. Blades of bulldozer 
B. Gas turbine blades 
C. Drill bit 
D. Springs of auto-mobiles 
List -II (Required Property) 
1. High wear resistance and high 
toughness 
2. Low Young’s modulus and high 
fatigue strength 
3. High wear and abrasion resistance 
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PAPER–II 
 
1. Match List - I with List - II and select, the 
correct answer using the code given below 
the lists 
List I (Application) 
A. Boiler Shell 
B. Marine Shaft Coupling 
C. Crosshead and Piston Rod 
D. Automobile gear box (gears to shaft) 
List - II (Joint) 
1. Cotter Joint 
2. Knuckle Joint 
3. Riveted joint 
4. Splines 
5. Bolted Joint 
Codes; 
A B C  D 
a.   1 4 2 5 
b.   3 5 1 4 
c.   1 5 2 4 
d.   3 4 1 5 
2. A single parallel fillet weld of total length 
L and weld size h subjected to a tensile 
load P, will have what design stress? 
a. Tensile and equal to 
0.707
p
Lh
 
b. Tensile and equal to 
p
Lh
 
c. Shear and equal to 
0.707
p
Lh
 
d. Shear and equal to 
p
Lh
 
3. How can shock absorbing of a belt be 
increased? 
a. By tightening it properly  
b. By increasing the shank 
c. By grinding the shank 
d. By making the shank equal to the core 
diameter 
4. How is the type of a railway wheel fitted? 
a. By seam welding 
b. By fillet welding 
c. By interference fit 
d. None of the above 
5. Consider the following statements in case 
of belt drives: 
1. Centrifugal tension in belt increases 
the transmitted 
2. Centrifugal tension does affect the 
driving tension 
3. Maximum tension in the belt is always 
three times the driving tension 
Which of the statements given above is/are 
correct? 
a. 1, 2 and 3  
b. 2 and 3 only 
c. 1 and 3 only  
d. 1 only 
6. The maximum efficiency of a screw jack 
having square threads with friction angle ? 
is: 
a. 
? ?
??
1tan /2
1tan /2
?
?
?
?
 
b. 
1tan
1tan
?
?
?
?
 
c. 
1sin
1sin
?
?
?
?
 
d. 
? ?
??
1sin /2
1sin /2
?
?
?
?
 
7. In designing a shaft for variable loads, the 
S.N. diagram can be drawn by: 
a. Joining the S
ut
 at 0 cycles and S
e
 at 10
6
 
cycles by a straight line on an S.N. 
graph 
b. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph 
c. Joining the 0.9 S
ut
 at 1000 cycles and 
S
e
 at 10
6
 cycles by a straight line on an 
S.N. graph 
d. Joining the S
ut
 at 1000 cycles and 0.9 
S
e
 at 10
6
 cycles by a straight line on a 
log S — log N graph  
I.E.S. (OBJ) - 2007 
M ME EC CH HA AN NI IC CA AL L  E EN NG GI IN NE EE ER RI IN NG G  
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(S
ut
 stands for ultimate tensile strength and 
S
e
 for the endurance limit) 
8. Match List - I with List - II and select the 
correct answer using the code given below 
the lists 
List-I 
A. Worm gear 
B. Spur gear 
C. Herringbone gear 
D. Spiral level gear 
List II 
1. Imposes no thrust load on the shaft 
2. To transmit power between two non-
intersecting shafts which are 
perpendicular to each other 
3. To transmit power when the shafts are 
parallel 
4. To transmit power when the shafts are 
at right angles to one another 
Codes; 
 A B C D 
a.   1 2 3 4 
b.   2 3 1 4 
c.   1 2 4 3 
d.   2 3 4 1 
9. The velocity ratio between pinion and gear 
in a gear drive is 2.3, the module of teeth 
is 2.0 mm and sum of number of teeth on 
pinion and gear is 99. What is the centre 
distance between pinion and the gear? 
a. 49.5 mm  
b. 99 m 
c. 148.5mm  
d. 198 mm 
10. Compared to gears with 200 pressure 
angle involutes full depth teeth, those with 
200 pressure angle and stub teeth have 
1. smaller addendum  
2. smaller dedendum 
3. smaller tooth thickness  
4. greater bending strength 
Which of the statements given above are 
correct? 
a. 1, 2 and 3 
b. 1, 2 and 4 
c. 1, 3 and 4 
d. 2, 3 and 4 
11. A hollow shaft of outer dia 40 mm and 
inner dia of 20 mm is to be replaced by a 
solid shaft to transmit the same torque at 
the same maximum stress. What should be 
the diameter of the solid shaft? 
a. 30 mm  
b. 35 mm 
c. 10 × (60)
1/3
 mm  
d. 10 × (20)
1/3
 mm 
12. Consider the following statements: 
For a journal rotating in a bearing under 
film lubrication conditions, the frictional 
resistance is 
1. proportional to the area of contact 
2. proportional to the viscosity of 
lubricant 
3. proportional to the speed of rotation 
4. independent of the pressure 
Which of the statements given above are 
correct? 
a. 1, 2, 3 and 4  
b. 1 and 4 only 
c. 2, 3 and 4 only  
d. 2 and 3 only 
13. Increase in values of which of the 
following results in an increase of the 
coefficient of friction in a hydrodynamic 
bearing? 
1. Viscosity of the oil. 
2. Clearance between shaft and bearing. 
3. Shaft speed 
Select the correct answer• using thc code 
given below 
a. 1 and 2 only  
b. 1 and 3 only 
c. 2 and 3 only  
d. 1, 2 and 3 
14. Average values of effective coefficients of 
friction for bearings are described below: 
1. Spherical ball bearing — f
1
 
2. Cylindrical roller bearing — f
2
 
3. Taper roller bearing — f
3
 
4. Stable (thick film) sliding contact 
bearing — f
4
 
Which one of the following sequences is 
correct? 
a. 
12 3 4
f ff f ? ?? 
b. 
12 4 3
f fff ? ?? 
c. 
21 3 4
f ff f ? ?? 
d. 
14 2 3
f fff ? ?? 
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15. Which one of the following expresses the 
total elongation of a bar of length L with a 
constant cross-section of A and modulus 
of Elasticity E hanging vertically and 
subject to its own weight W? 
a. 
WL
AE
 
b. 
2
WL
AE
 
c. 
2WL
AE
 
d. 
4
WL
AE
 
16. In a strained material one of the principal 
stresses is twice the other. The maximum 
shear stress in the same case is ?
max
. Then, 
what is the value of the maximum 
principle stress? 
a. ?
max
 
b. 2 ?
max
 
c. 4 ?
max
 
d. 8 ?
max
 
17. For a general two dimensional stress 
system, what are the coordinates of the 
centre of Mohr’s circle? 
a. 
? ?
,0
2
xy
?? ?
 
b. 
? ?
0,
2
x y
? ? ?
 
c. ,0
2
xy
?? ? ??
??
??
 
d. 
? ?
0,
2
x y
? ? ?
 
18. If the ratio G/E (G = Rigidity modulus, E 
= Young’s modulus of elasticity) is 0.4, 
then what is the value of the Poisson ratio? 
a. 0.20 
b. 0.25 
c. 0.30  
d. 0.33 
19. What are the materials which show 
direction dependent properties, called? 
a. Homogeneous materials  
b. Viscoelastic materials 
c. Isotropic materials  
d. Anisotropic materials 
20. What is the phenomenon of progressive 
extension of the material i.e., strain 
increasing with the time at a constant load, 
called? 
a. Plasticity  
b. Creeping  
c. Yielding 
d. Breaking 
21. Which one of the following statements is 
correct? 
If a material expands freely due to heating, 
it will develop 
a. thermal stress  
b. tensile stress 
c. compressive stress 
d. no stress 
22. A cantilever beam of 2 m length supports a 
triangularly distributed load over its entire 
length, the maximum of which is at the 
free end. The total load is 37.5 kN. What is 
the bending moment at the fixed end? 
a. 50 × 10
6 
N mm  
b. 125 × 10
6 
N mm 
c. 100 × 10
6 
N mm 
d. 25 × 10
6
 N mm 
23. Which one of the following statements is 
correct? 
A beam is said to be of uniform strength, if 
a. the bending moment is the same 
throughout the beam 
b. the shear stress is the same throughout 
the beam 
c. the deflection is the same throughout 
the beam 
d. the bending stress is the same at every 
section along its longitudinal axis 
24. Which one of the following statements is 
correct? 
When a rectangular section beam is loaded 
transversely along the length, shear stress 
develops on 
a. top fibre of rectangular beam 
b. middle fibre of rectangular beam 
c. bottom fibre of rectangular beam 
d. every horizontal plane 
25. The diameter of a solid shaft is D. The 
inside and outside diameters of a hollow 
shaft of same material and length are 
D/ 3 and 2D / 3 respectively. What is 
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the ratio of the weight of the hollow shaft 
to that of the solid shaft? 
a. 1 : 1  
b. 1 : 4 
c. 1 : 2  
d. 1 : 3 
26. Which one of the following statements is 
correct? 
If a helical spring is halved in length, its 
spring stiffness 
a. remains same  
b. halves 
c. doubles  
d. triples 
27. A solid circular shaft is subjected to a 
bending moment M and twisting moment 
T. What is the equivalent twisting moment 
Te which will produce the same maximum 
shear stress as the above combination? 
a. 
22
M T ? 
b. M T ? 
c. 
22
M T ? 
d. M T ? 
28. Consider the following statements: 
In a thick walled cylindrical pressure 
vessel subjected to internal pressure, the 
tangential and radial stresses are 
1. minimum at outer side. 
2. minimum at inner side. 
3. maximum at inner side & both reduce 
to zero at outer wall. 
4. maximum at inner wall but the radial 
stress reduces to zero at outer wall. 
Which of the statements given above is/are 
correct? 
a. 1 and 2 
b. 1 and 3 
c. 1 and 4  
d. 4 only 
29. Match List - I with List -II and select the 
correct answer using the code given below 
the lists 
List - I (Long Column) 
A. Both ends hinged 
B. One end fixed, and other end free 
C. Both ends fixed 
D. One end fixed, and other end hinged 
List - II (Critical Load) 
1. ?
2 
EI/4l
2
 
2. 4 ?
2 
EI/l
2
 
3. 2 ?
2 
EI/l
2
 
4. ?
2 
EI/l
2
 
Codes; 
 A B C D 
a.   2 1 4 3 
b.   4 1 2 3 
c.   2 3 4 1 
d.   4 3 2 1 
30. Which one of the following is the correct 
ascending order of packing density for the 
given crystal structures of metals? 
a. Simple cubic — Face centred cubic — 
Body centred cubic 
b. Body centred cubic — Simple cubic — 
Face centred cubic 
c. Simple cubic — Body centred cubic — 
Face centred cubic 
d. Body centred cubic — Face centred 
cubic — Simple cubic 
31. Vibration damping in machinery is best 
achieved by means of base structures made 
of which one of the following materials? 
a. Low carbon steel  
b. Nodular iron 
c. Grey cast iron  
d. White cast iron 
32. For a Rhombohedral space lattice, which 
one of the following is correct? 
a. 90 ? ?? ? ?? ? 
b. 90 ? ?? ? ?? ? 
c. 90 ??? ? ??? 
d. 90 ? ?? ? ?? ? 
33. Match List - I with List - II and select the 
correct answer using the code given below 
the lists: 
List - I (Component) 
A. Blades of bulldozer 
B. Gas turbine blades 
C. Drill bit 
D. Springs of auto-mobiles 
List -II (Required Property) 
1. High wear resistance and high 
toughness 
2. Low Young’s modulus and high 
fatigue strength 
3. High wear and abrasion resistance 
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4. High creep strength and good 
corrosion resistance 
Codes; 
 A B C D 
a.   3 2 1 4 
b.   1 4 3 2 
c.   3 4 1 2 
d.   1 2 3 4 
34. What is the approximate strain energy 
expression for a dislocation of unit length, 
irrespective of its edge or screw character? 
a. 
2
2
Gb
 
b. 
2
2
Gb
 
c. 
2
4
Gb
 
d. 
2
4
Gb
 
35. What is the movement of block of atoms 
along certain crystallographic planes and 
directions, termed as? 
a. Glide  
b. Twinning 
c. Slip  
d. Jog 
36. Which one of the following is the correct 
statement? Pearlite in iron-carbon system 
is a 
a. phase consisting of ferrite and 
cementite at room temperature 
b. mechanical mixture of ferrite and 
cementite at room temperature 
c. eutectic mixture of ferrite and 
cementite at room temperature 
d. All the above three are correct 
37. Match List - I with List -II and select the 
correct answer using the code given below 
the Lists: 
List - I (Name of the Invariant Reaction) 
A. Monotectic 
B. Eutectic 
C. Eutectoid 
D. Peritectic 
List-II (Invariant Reaction During 
Cooling) 
1. LIQUID SOLID
1
 + SOLID
2
 
2. LIQUID
1
 .... LIQUID
2
 + SOLID 
3. SOLID
1
 .... SOLID
1
 + SOLID
2
 
4. LIQUID + SOLID
1
 .... SOLID
2
 
Codes; 
 A B C D 
a.   3 2 1 4 
b.   1 4 3 2 
c.   3 4 1 2 
d.   1 2 3 4 
38. Which of the following factors influence 
hardness in a plain carbon steel? 
1. Percentage carbon  
2. Quenching media 
3. Work size 
Select the correct answer using the code 
given below: 
a. 1 and 2 only  
b. 2 and 3 only 
c. 1 and 3 only  
d. 1, 2 and 3 
39. Match List - I with List -II and select the 
correct answer using the code given below 
the lists: 
List - I (Material) 
A. Fibre reinforced plastics 
B. Acrylics 
C. Phenolics 
D. Butadiene rubber 
List-II (Application) 
1. Automobile tyres 
2. Aircraft 
3. Lenses 
4. Electric switch cover 
Codes 
 A B C D 
a.   1 4 3 2 
b.   2 3 4 1 
c.   1 3 4 2 
d.   2 4 3 1 
40. Which one among the following is the 
most effective strengthening mechanism of 
non-ferrous metal? 
a. Solid solution hardening  
b. Strain hardening 
c. Grain size refinement 
d. Precipitation hardening 
41. Wood is a natural composite consisting of 
which of the following? 
a. Lignin fibres in collagen matrix 
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