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Theory of Machine

Theory of Machine
The behaviour of gases can be fully determined by

1 law
2 laws
3 laws
4 laws

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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)

μwr
¾μWR
²/₃ μWR
½μWR

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Theory of Machine
The lower pairs are _________ pairs.

Force-closed
None of these
Self-closed
Friction closed

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Theory of Machine
When two links are connected by a pin joint, their instantaneous center lies

At the center of curvature
On their point of contact
At the center of circle
At the pin joint

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Theory of Machine
The power transmitted by a belt is maximum when the maximum tension in the belt is _________ of centrifugal tension.

One-third
Two-third
Three times
Double

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Theory of Machine
The rotating shafts tend to vibrate violently at whirling speeds because

The shafts are rotating at very high speeds
Bearing centre line coincides with the axis
The system is unbalanced
Resonance is caused due to the heavy mass of the rotor

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