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

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

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

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Engineering Mechanics
The acceleration of a body sliding down an inclined surface is

None of these
g tanθ
g cosθ
g sinθ

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Engineering Mechanics
The moment of inertia of a solid sphere of mass ‘m’ and radius ‘r’ is

2mr²/3
mr²
2mr²/5
mr²/2

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Engineering Mechanics
The rate of doing work is known as

None of these
Potential energy
Kinetic energy
Power

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Engineering Mechanics
The algebraic sum of moments of the forces forming couple about any point in their plane is

Constant
Equal to the moment of the couple
Both of above are wrong
Both of above are correct

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