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

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

## Theory of Machine For dynamic balancing of a shaft

Both (A) and (B)
The net couple due to the dynamic forces acting on the shaft is equal to zero
None of these
The net dynamic force acting on the shaft is equal to zero

## Theory of Machine In multi V-belt transmission, if one of the belt is broken, we have to change the

Broken belt and its adjacent belts
Broken belt
There is no need of changing any one as remaining belts can take care of transmission of load
All the belts

## Theory of Machine Which of the following statements regarding laws governing the friction between dry surfaces are correct?

The friction force is dependent on the materials of the contact surfaces.
The friction force is directly proportional to the normal force.
The friction force is independent of me area of contact.
All of these

Higher pairs
Turning pairs
Rolling pairs
Lower pairs

## Theory of Machine A point on a connecting link (excluding end points) of a double slider crank mechanism traces a

Parabolic path
Hyperbolic path
Straight line path
Elliptical path