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Theory of Machine

Theory of Machine
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is

10
30
20
34

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Theory of Machine
In under damped vibrating system, the amplitude of vibration

Decreases linearly with time
Increases exponentially with time
Increases linearly with time
Decreases exponentially with time

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Theory of Machine
In S.H.M., the velocity vector w.r.t. displacement vector

Leads by 90°
Are in phase
Lags by 90°
Leads by 180°

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Theory of Machine
Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts?

Mechanisms
Theory of machines
Applied mechanics
Kinetics

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Theory of Machine
When the pitching of a ship is upward, the effect of gyroscopic couple acting on it will be

To raise the bow and lower the stern
To move the ship towards starboard
To raise the stern and lower the bow
To move the ship towards port side

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Theory of Machine
Flexible coupling is used because

It is easy to engage and disengage
It is easy to disassemble
It prevents shock transmission and eliminates stress reversals
It transmits shocks gradually

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