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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

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

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

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

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

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

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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

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

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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

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

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Engineering Mechanics
The energy possessed by a body, for doing work by virtue of its position, is called

Electrical energy
Chemical energy
Kinetic energy
Potential energy

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