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Engineering Mechanics

Engineering Mechanics
An ideal machine is one whose efficiency is

Between 80 and 90%
Between 60 and 70 %
1
Between 70 and 80%

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Engineering Mechanics
The angular velocity (in rad/s) of a body rotating at N revolutions per minute is

πN/60
πN/180
2πN/60
2πN/180

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

Heat energy
Kinetic energy
Strain energy
Electrical energy

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

Chemical energy
Electrical energy
Kinetic energy
Potential energy

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Engineering Mechanics
The amplitude is always __________ radius of the circle.

Equal to
Greater than
Less than
None of these

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Engineering Mechanics
If a body is acted upon by a number of coplanar non-concurrent forces, it may

All of these
Rotate about itself without moving
Move in any one direction rotating about itself
Be completely at rest

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