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Engineering Mechanics
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Question
Moment of inertia of a rectangular section having width (
b
) and depth (
d
) about an axis passing through its C.G. and parallel to the width (
b
), is
Options
A.
B.
C.
D.
Correct Answer
More questions
1. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Options
A. shearing
B. piercing
C. punching
D. blanking
Show Answer
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Discuss
Correct Answer: piercing
2. The austenitic stainless steel contains
Options
A. 18% chromium and 8% nickel
B. 8% chromium and 18% nickel
C. 14% chromium and 0.35% carbon
D. 14% nickel and 0.35% carbon
Show Answer
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Correct Answer: 18% chromium and 8% nickel
3. A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as
Options
A. steam condenser
B. steam boiler
C. steam preheater
D. economiser
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Correct Answer: steam condenser
4. Inconel contains
Options
A. 65% nickel, 15% chromium and 20% iron
B. 68% nickel, 29% copper and 3% other constituents
C. 80% nickel and 20% chromium
D. 80% nickel, 14% chromium and 6% iron
Show Answer
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Correct Answer: 80% nickel, 14% chromium and 6% iron
5. A heat pump working on a reversed Carnot cycle has a C.O.P. of 5. It works as a refrigerator taking 1 kW of work input. The refrigerating effect will be
Options
A. 1 kW
B. 2 kW
C. 3 kW
D. 4 kW
Show Answer
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Correct Answer: 4 kW
6. Brittle materials when subjected to tensile loads, snap off without giving any sensible elongation.
Options
A. Yes
B. No
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Correct Answer: Yes
7. The ratio of specific heat at constant pressure (
c
p
) and specific heat at constant volume (
c
v
) is
Options
A. equal to one
B. less than one
C. greater than one
D. none of these
Show Answer
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Correct Answer: greater than one
8. The normal heptane (C
7
H
16
) is given a rating of __________ octane number.
Options
A. 0
B. 50
C. 100
D. 120
Show Answer
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Correct Answer: 0
9. The detonating tendency in petrol engines increases with increase of compression ratio.
Options
A. True
B. False
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Correct Answer: True
10. In the shown figure, the tension (
T
) in the string will be
Options
A.
B.
C.
D.
Show Answer
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Discuss
Correct Answer:
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