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Engineering Mechanics

Engineering Mechanics
The slope on the road surface generally provided on the curves is known as

Angle of repose
None of these
Angle of banking
Angle of friction

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Engineering Mechanics
The moment of inertia of a thin disc of mass ‘m’ and radius ‘r’, about an axis through its center of gravity and perpendicular to the plane of the disc is

mr²/2
mr²/8
mr²/4
mr²/6

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Engineering Mechanics
The efficiency of a lifting machine is the ratio of

Mechanical advantage to the velocity ratio
Output to the input
All of these
Work done by the machine to the work done on the machine

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Engineering Mechanics
The velocity ratio of a differential pulley block with D and d as the diameters of larger and smaller pulley, is

D/(D + d)
D/(D - d)
2D/(D + d)
2D/(D - d)

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Engineering Mechanics
The unit of angular velocity is

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

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Engineering Mechanics
The velocity ratio of a single purchase crab winch can be increased by

Increasing the radius of the load drum
Increasing the length of the handle
All of these
Increasing the number of teeth of the pinion

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