Exercise: Engineering Mechanics

Questions for: Engineering Mechanics

Energy may be defined as the capacity of doing work.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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A couple produces
A:
translatory motion
B:
rotational motion
C:
combined translatory and rotational motion
D:
none of the above
Answer: B
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The terms 'leverage' and 'mechanical advantage' Of a compound lever have got the same meaning.
A:
Correct
B:
Incorrect
C:
D:
Answer: A
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In a screw jack, the effort required to lift the load is given by(where W = Load lifted, α = Helix angle, and φ = Angle of friction.)
A:
P = W tan (α - φ)
B:
P = W tan (α + φ)
C:
P = W tan (φ - α)
D:
P = W cos (α + φ)
Answer: B
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The moment of inertia of a solid cylinder of mass m, radius r and length l about the longitudinal axis or polar axis is
A:
mr2/2
B:
mr2/4
C:
mr2/6
D:
mr2/8
Answer: A
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