IES/ESE Paper (Mechanical) - 2007

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

``` 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
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
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
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
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
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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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
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
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
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
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)
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
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
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
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
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)
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
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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```

194 docs

## FAQs on IES/ESE Paper (Mechanical) - 2007 - ISRO, GATE & IES/ESE Mechanical Previous Year Solved Papers - Mechanical Engineering

 1. What is IES/ESE and how is it related to the Mechanical paper?
Ans. IES/ESE stands for Indian Engineering Services/Engineering Services Examination. It is a competitive exam conducted by the Union Public Service Commission (UPSC) in India. The Mechanical paper is one of the papers included in the IES/ESE exam. It focuses on testing the knowledge and skills of candidates in the field of mechanical engineering.
 2. How can I prepare for the IES/ESE Mechanical paper effectively?
Ans. To prepare for the IES/ESE Mechanical paper effectively, it is important to have a thorough understanding of the syllabus and exam pattern. Start by studying the core concepts of mechanical engineering and then move on to solving previous year question papers and mock tests. Joining a coaching institute or online courses can also be helpful in providing guidance and study materials.
 3. What are the important topics to cover for the IES/ESE Mechanical paper?
Ans. The important topics to cover for the IES/ESE Mechanical paper include thermodynamics, strength of materials, fluid mechanics, heat transfer, machine design, manufacturing processes, engineering mechanics, and engineering mathematics. It is advisable to refer to the official syllabus provided by UPSC for a detailed list of topics.
 4. Is there negative marking in the IES/ESE Mechanical paper?
Ans. Yes, there is negative marking in the IES/ESE Mechanical paper. For every incorrect answer, one-third of the marks assigned to that question will be deducted as penalty. It is important to be cautious while attempting the questions and only answer when reasonably sure about the correct option.
 5. Can I use a calculator in the IES/ESE Mechanical paper?
Ans. No, the use of calculators or any electronic devices is not allowed in the IES/ESE Mechanical paper. Candidates are expected to perform calculations manually. However, rough work and calculations can be done on the blank space provided in the question paper.

## ISRO, GATE & IES/ESE Mechanical Previous Year Solved Papers

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