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Theory of Machine

Theory of Machine
The primary unbalanced force is maximum _________ in one revolution of the crank.

Sixteen times
Eight times
Four times
Twice

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Theory of Machine
For a kinematic chain to be considered as mechanism

One link should be fixed
There is no such criterion
Two links should be fixed
None of the links should be fixed

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Theory of Machine
The instantaneous centers which vary with the configuration of mechanism are called

Permanent instantaneous centers
Fixed instantaneous centers
None of these
Neither fixed nor permanent instantaneous centers

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

Cylindrical pair
Sliding pair
Turning pair
Rolling pair

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Theory of Machine
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)

(3/4) μ W R
(2/3) μ W R
(1/2) μ W R
μ W R

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Theory of Machine
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on A. A triangle

A straight line
A point
Two lines
A triangle

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