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SOM Final sem Quiz

Total questions: 91

Worksheet time: 10hrs 42mins

Name
Class
Date
1.
2° =__________ radians
a)
0.0348
b)
0.067
c)
0.09
d)
0.123
2.
The width of abeam is 60 mm and thickness is 60 mm Then the Moment of inertia is
a)
1080000 mm3
b)
72000 mm3
c)
36000 mm3
d)
24000 mm3
3.
Unit of Shear Modulus is
a)
N/m
b)
N/mm2
c)
N-m
d)
N-mm2
4.
1 = ___________ radians
a)
π /180
b)
π / 90
c)
π / 360
d)
1/ π
5.
For a rectangular beam width b and depth d, Moment of inertia, I =
a)
bd3/12
b)
bd3 / 36
c)
bd3 / 6
d)
bd3 / 8
6.
When a helical compression spring is subjected to an axial compressive load, the stress induced is
a)
Tensile
b)
Compressive
c)
Bending
d)
Shear
7.
The maximum bending moment of a cantilever beam of length L and a load W at its free end is given by
a)
WL
b)
WL/2
c)
WL/4
d)
none of these
8.
The stress developed at the centre of the shaft subjected to pure torsion is
a)
Maximum
b)
Minimum
c)
Zero
d)
Unpredictable
9.
The material of the beam is .
a)
Homogeneous
b)
Heterogeneus
c)
Isotropic
d)
A & C
10.
In the bending equation E is the Modulus of Elasiticty, R is the radius, y is the distance from neutral layer to the outer layer then the bending stress σ =
a)
ER/y
b)
R/Ey
c)
Ey/R
d)
None of these above
11.
In the bending equation, y =
a)
fI/M
b)
MI/f
c)
Mf/I
d)
none of these
12.
In the bending equation, M =
a)
RI/E
b)
ER/I
c)
EI/R
d)
none of these
13.
In the bending equation, E =
a)
MR/I
b)
IR/M
c)
MI/R
d)
none of these
14.
In the bending equation, I =
a)
MR/E
b)
ER/M
c)
ME/R
d)
none of these
15.
In the bending equation, R =
a)
MI/E
b)
EI/M
c)
EM/I
d)
none of these
16.
In a rectangular bar, b = 120 mm, d = 20 mm. Moment of Inertia =
a)
80 x10⁴ mm⁴
b)
8 x 10⁴ mm⁴
c)
800 x 10⁴ mm⁴
d)
none of these
17.
In a rectangular section, width = 40 mm, d = 60 mm. Find Section Modulus.
a)
2400 mm³
b)
240 mm³
c)
24000 mm³
d)
24 mm³
18.
For a Cantilever beam, the maximum bending moment is at
a)
Free end
b)
Fixed end
c)
Middle
d)
None of these
19.
A Steel plate of width 120 mm and thickness 20mm, Find the Moment of inertia.
a)
16 X 10⁴ mm⁴
b)
8 X 10⁴ mm⁴
c)
0.8 X 10⁴ mm⁴
d)
80 X 10⁴ mm⁴
20.
Find the moment of inertia of hollow pipe if D = 20mm, d =10mm.
a)
730 X 10³ mm⁴
b)
7.3 X 10³mm⁴
c)
73 X 10³ mm⁴
d)
7.3 X 10⁴ mm⁴
21.
Find the section modulus of a rectangular section if b = 60 mm and d = 30 mm.
a)
90 X 10³ mm³
b)
900 X 10³ mm³
c)
9 X 10³ mm³
d)
0.9 X 10³ mm³
22.
Find the section modulus of a rectangular section if b = 30 mm and d = 20 mm.
a)
2 X 10³ mm³
b)
20 X 10³ mm³
c)
200 X 10³ mm³
d)
0.2 X 10³mm³
23.
Find the Section Modulus if bending moment M = 4 X 106 N mm and the maximum stress is 166.67 N/mm2
a)
240 mm³
b)
240 mm³
c)
2400 mm³
d)
24000 mm³
24.
The diameter of a circular pipe is 20 mm. Find the Section Modulus.
a)
785.3 mm³
b)
7.853 mm³
c)
78.53 mm³
d)
0.7853 mm³
25.
Which of the following is wrong
a)
f = M/Z
b)
Z = M/f
c)
M = f/Z
d)
M = f x Z
26.
The leaf spring is an example of ________________
a)
Torsion Spring
b)
Bending spring
c)
Coiled spring
d)
None of these
27.
Section modulus is given by
a)
Y/I
b)
MI/Y
c)
I/Y
d)
f/y
28.
Power, P = 60000 2πNT , the unit of T is ______
a)
N/m
b)
N m
c)
N/m2
d)
N/m3
29.
M=
a)

f x Z

b)
f/ Z
c)
Z/f
d)
TxZ
30.
Convert θ = 2° into radians
a)
0.03
b)
0.04
c)
0.05
d)
0.06
31.
Convert θ = 4° into radians
a)
0.03
b)
0.04
c)
0.05
d)
0.06
32.
Convert 0.03 into Degrees
a)
4°
b)
2°
c)
6°
d)
8°
33.
Convert 0.13 into Degrees
a)
3°
b)
8°
c)
4°
d)
5°
34.
Which of the following is not the unit of power
a)
Watt
b)
Joule
c)
Nm/s
d)
J/s
35.
The diameter of the shaft is 20 mm. Find polar modulus
a)
15 x 103 mm3
b)
150 x 103 mm3
c)
0.15 x 103 mm3
d)
1.5 x 103 mm3
36.
Find the power if Torque T = 3605 N m and N = 180 rpm
a)
67.95 Kw
b)
76.45 kW
c)
679.5 kW
d)
70 kW
37.
A shaft twist is an effect of .
a)
Bending
b)
Compression
c)
Load
d)
Torsion
38.

Bending Moment M = _____________________

a)

Z-f

b)

f/Z

c)

Z/f

d)

fxZ

39.

Bending moment, M = 20 Nmm, Moment of Inertia, I = 4 mm4, Bending Stress f =10 N/mm2, y = ______

a)

5mm

b)

4mm

c)

2mm

d)

6mm

40.

torsional moment T =_____________

a)

ZXF

b)

f/ Z

c)

Zpxfs

d)

fxZ

41.

The diameter of the shaft is 20 mm. Find polar moment of inertia.

a)

15000mm4

b)

15707.96 mm4

c)

15500 mm4

d)

15850mm4

42.

A closely coiled helical spring has the mean coil radius of 50 mm, Twisting moment = 10000 N mm. Find the load.

a)

200 N

b)

300 N

c)

400 N

d)

100 N

43.

A closely coiled helical spring has stiffness of 7.14 N/mm and deflection of 28 mm. Find Axial load

a)

300 N

b)

200 N

c)

100 N

d)

400 N

44.

A closely coiled helical spring carries a load of 200 N and the mean coil radius is 50 mm. Find the Twisting moment

a)

100 N mm

b)

10000 N mm

c)

1000 N mm

d)

10 N mm

45.

The unit of stiffness is _________

a)

N/mm

b)

N/mm2

c)

N mm

d)

N-m2

46.

In a closely coiled helical spring, the mean coil radius R = 50 mm, No. of coils n = 10. Find length of the wire.

a)

3142 mm

b)

3.142 mm

c)

31.42 mm

d)

314.2 mm

47.

The shear stress fs =

a)

16R/πd3

b)

16WR/πd4

c)

32WR/πd3

d)

32WR/πd4

48.

The unit of maximum shear stress is ________

a)

N/mm2

b)

N/mm

c)

N mm

d)

N-m2

49.

In a closely coiled helical spring, the mean coil radius R = 50 mm, Length = 3142 mm. Find number of the coils.

a)

20

b)

10

c)

15

d)

5

50.

Neutral axis of a beam is the axis

a)

The shear is zero

b)

The moment of inertia is zero

c)

The Bending stress is zero

51.

The section Modulus of circular section is

a)

π/32 d3

b)

π/32 d4

c)

π/32 d2

d)

π/16 d2

52.

If d is the diameter of the circle, Z is the section Modulus then ymax =

a)

D/6

b)

D/2

c)

D/4

d)

D/8

53.

Determine the torque of a solid shaft which will transmit 75 kW power at 200 rpm

a)

35.81 N m

b)

3.581 N m

c)

3581 N m

d)

358.1 N m

54.

Which of the following is the example of bending spring

a)

Leaf Spring

b)

Laminated spring

c)

both (a) and (b)

d)

None of these

55.

When a closely coiled spring is subjected to an axial load, it is said to be under

a)

Bending

b)

Shear

c)

Torsion

d)

All of these

56.

The device which is used to absorb energy due to resilience is

a)

Gear drive

b)

Belt drive

c)

Spring

d)

None of these

57.

In a closely coiled helical spring,the length of the wire = 3142 mm, No. of coils n = 10. Find mean coil radius.

a)

20 mm

b)

30 mm

c)

50 mm

d)

40 mm

58.

Spring which is subjected to bending only is

a)

Torsion Spring

b)

Bending Spring

c)

Leaf Spring

d)

Helical Spring

59.

The Spring which is subjected to torsion or twisting moment is

a)

Torsion Spring

b)

Bending Spring

c)

Leaf Spring

d)

Helical Spring

60.

A closely coiled helical spring carries an axial load of 100 N and has deflection 18 mm. Find Stiffness

a)

555 N/mm

b)

55.5 N/mm

c)

0.555 N/mm

d)

5.55 N/mm

61.

A closely coiled helical spring has stiffness of 7.14 N/mm and deflection of 28 mm. Find Axial load.

a)

300 N

b)

200 N

c)

100 N

d)

400 N

62.

The unit of axial load is _________

a)

N

b)

N-m

c)

N-m2

d)

N/mm2

63.

Theory of simple bending is put forward by

a)

Newton

b)

Euler-Bernoulli

c)

Rankine

d)

Hook

64.

The independent elastic constants for a homogeneous and isotropic material are

a)

E,K,G

b)

E,K,G,v

c)

E,K,v

d)

E,G

65.

The unit of point load is ______

a)

Newton

b)

Watt

c)

Joule

d)

Volt

66.

If Bending moment, M = 30Nmm, Moment of Inertia, I = 6 mm4, y = 10 mm, Bending stress, then f = ________

a)

40mm

b)

50mm

c)

60mm

d)

65mm

67.

Find the bending moment if the maximum stress is 300 N/mm2, Section modulus is Z = 20000 mm3.

a)

6 X 106N mm

b)

60 X 106N mm

c)

600 X 106N mm

d)

0.6 X 106N mm

68.

Find the power if Torque T = 4500 N m and N = 150 rpm

a)

67.00 Kw

b)

76.45 kW

c)

679.5 kW

d)

70.68 kW

69.

In P = 2πNT/60000, the unit of P is ______

a)

Newton

b)

KiloWatts

c)

Joule

70.

Shafts are usually used in

a)

supports gears

b)

sprockets

c)

wheels & rotors

d)

All of the above

71.

The moment of resistance =

a)

Shear Stress / Polar Modulus

b)

Polar Modulus / Shear Stress

c)

Shear Stress X Polar Modulus

d)

None of these

72.

The unit of deflection is ________

a)

mm3

b)

mm

c)

mm2

d)

mm4

73.

A closely coiled helical spring has the mean coil radius of 50 mm, Twisting moment = 10000 N mm. Find the load.

a)

200 N

b)

300 N

c)

400 N

d)

100 N

74.

In a closely coiled helical spring, the mean coil radius R = 50 mm, Length = 3142 mm. Find number of the coils.

a)

20

b)

10

c)

15

d)

5

75.

The spring in which wire is coiled so close is

a)

Bending spring

b)

Open coiled helical spring

c)

Closely coiled helical spring

d)

Torsion spring

76.

In a Simply supported beam, the maximum bending moment is at

a)

Free end

b)

Fixed end

c)

Middle

d)

None of these

77.

If Moment of Inertia, I = 6 mm4,y = 10 mm, Bending stress f = 50 mm, then Bending moment M = ________

a)

40mm

b)

45mm

c)

50mm

d)

30mm

78.

If Bending moment, M = 30Nmm, Moment of Inertia, I = 6 mm4, y = 10 mm, Bending stress, then f = ________

a)

40mm

b)

50mm

c)

60mm

d)

65mm

79.

Polar Modulus is a ratio of___________

a)

Polar Moment of Intertia / Maximum radius

b)

Maximum radius / Polar Moment of Inertia[ C ]

c)

Polar Moment of Inertia X Maximum radius

d)

none of these

80.

The unit of Rigidity Modulus C is

a)

N/mm2

b)

N

c)

N/mm3

d)

kw

81.

Polar modulus =

a)

Moment of Resistance X Shear stress

b)

Moment of Resistance / Shear stress

c)

Shear stress / Moment of Resistance

d)

None of these

82.

Stiffness=

a)

Cd3/64R3n

b)

Cd4/64R3n

c)

Cd3/64R2n

d)

Cd3/64R5n

83.

The line of intersection of the neutral layer with the transverse section is

a)

Axial line

b)

Tangential Axis

c)

Neutral axis

d)

Positive layer

84.

In the bending equation, the unit of R is ______

a)

mm2

b)

mm3

c)

mm

d)

No unit

85.

The ratio of moment of inertia of a section about the neutral axis to the distance of the outermost layer from the neutral axis is

__________

a)

Elastic Modulus

b)

Section Modulus

c)

Rigidity Modulus

d)

Bulk Modulus

86.

Power transmitted by the shaft is

a)

Mean torque X Angle turned per second

b)

Mean torque / Angle turned per second

c)

Angle turned per second / Mean torque

d)

None of these

87.

Determine the torque of a solid shaft which will transmit 90 kW power at 160 rpm

a)

53.715 Nm

b)

5.3715 Nm

c)

5371.5 Nm

d)

537.15 Nm

88.

The unit of strain energy is ________

a)

N/mm2

b)

N/mm3

c)

N/mm

d)

N mm

89.

.

The power transmitted by the shaft P = ______

a)

2πNT/600

b)

2πNT/6000

c)

2πNT/6

d)

2πNT/60000

90.

Determine the torque of a solid shaft which will transmit 300 kW power at 200 rpm

a)

143.24Nm

b)

14.324Nm

c)

143.24Nm

d)

14324Nm

91.

Determine the torque of a solid shaft which will transmit 120 kW power at 200 rpm

a)

572.9Nm

b)

5.729Nm

c)

57.29Nm

d)

5729Nm

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