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Engineering Mechanics

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

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

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Engineering Mechanics
The friction experienced by a body, when in motion, is known as

Static friction
Dynamic friction
Rolling friction
Limiting friction

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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
All of these
Increasing the number of teeth of the pinion
Increasing the length of the handle

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Engineering Mechanics
Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.

None of these
Horizontal
Downwards
Upwards

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Engineering Mechanics
The units of moment of inertia of mass are

kg-m²
m²/kg
kg/m
kg/m²

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Engineering Mechanics
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act

Away from the wall at its upper end
Upward at its upper end
Towards the wall at its upper end
Downward at its upper end

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