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Theory of Machine

Theory of Machine
A mechanism is an assemblage of

Three links
Two links
All of these
Four or more than four links

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Theory of Machine
A pulley and belt in a belt drive form a

Sliding pair
Rolling pair
Turning pair
Cylindrical pair

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Theory of Machine
The example of lower pair is

All of these
Shaft revolving in a bearing
Straight line motion mechanisms
Automobile steering gear

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Theory of Machine
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to

0.2
0.8
0.4
0.6

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Theory of Machine
The unbalanced force due to revolving masses

Varies in magnitude and direction both
Constant in magnitude and direction both
Varies in magnitude but constant in direction
Varies in direction but constant in magnitude

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Theory of Machine
Torsional vibrations are said to occur when the particles of a body moves

None of these
In a circle about its axis
Parallel to its axis
Perpendicular to its axis

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