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Theory of Machine

Theory of Machine
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than

1
0.5
2
0.25

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Theory of Machine
The secondary unbalanced force is __________ the primary unbalanced force.

Two-third
One-half
1/n times
n times

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

½μWR
²/₃ μWR
μwr
¾μWR

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Theory of Machine
When a point moves along a straight line, its acceleration will have

Coriolis component only
Radial component only
Tangential component only
Radial and tangential components both

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Theory of Machine
The number of centers in a crank driven slider crank mechanism is

6
4
2

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Theory of Machine
The frictional torque transmitted by a cone clutch is same as that of

Truncated conical pivot bearing
Flat collar bearing
Flat pivot bearing
Conical pivot bearing

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