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Engineering Mechanics

Engineering Mechanics
In a screw jack, the effort required to lower the load is __________ the effort required to raise the same load.

Equal to
None of these
Less than
More than

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Engineering Mechanics
The angle between two forces when the resultant is maximum and minimum respectively are

90° and 0°
180° and 0°
90° and 180°
0° and 180°

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Engineering Mechanics
When the spring of a watch is wound, it will possess

Heat energy
Strain energy
Kinetic energy
Electrical energy

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

2mr²/5
mr²/2
mr²
2mr²/3

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Engineering Mechanics
The bodies which rebound after impact are called

Inelastic bodies
None of these
Neither elastic nor inelastic bodies
Elastic bodies

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Engineering Mechanics
The velocity ratio of a simple wheel and axle with D and d as the diameters of effort wheel and load axle, is

D / d
D + d
D - d
D × d

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