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Engineering Mechanics

Engineering Mechanics
The maximum efficiency of a lifting machine is

V.R./m
m/V.R.
1/m
1/(m × V.R.)

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Engineering Mechanics
The unit of angular velocity is

m/min
Both (B) and (C)
Revolutions/min
rad/s

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Engineering Mechanics
The frequency of oscillation of a compound pendulum is (where kG = Radius of gyration about the centroidal axis, and h = Distance between the point of suspension and C.G. of the body.)

2π. √(kG² + h²/gh)
2π. √(gh/kG² + h²)
1/2π. √(gh/kG² + h²)
1/2π. √(kG² + h²/gh)

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Engineering Mechanics
Two like parallel forces are acting at a distance of 24 mm apart and their resultant is 20 N. It the line of action of the resultant is 6 mm from any given force, the two forces are

15 N and 15 N
15 N and 5 N
None of these
20 N and 5 N

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Engineering Mechanics
A machine having an efficiency greater than 50%, is known as

Non-reversible machine
Ideal machine
Reversible machine
Neither reversible nor non-reversible machine

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Engineering Mechanics
The velocity ratio of a first system of pulleys with 4 pulleys is

4
16
8
20

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MORE MCQ ON Engineering Mechanics

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