## Theory of Machine Effort of a governor is the

Mean force exerted at the sleeve for maximum equilibrium speed
None of these
Mean force exerted at the sleeve for a given percentage change of speed
Work-done at the sleeve for maximum equilibrium speed

## Theory of Machine Crowning on pulleys helps

In increasing velocity ratio
In decreasing the slip of the belt
Increase belt and pulley life
For automatic adjustment of belt position so that belt runs centrally

## Theory of Machine A foot step bearing and rotor of a vertical turbine form examples of

Successfully constrained motion
Completely constrained motion
Partially constrained motion
Incompletely constrained motion

## Theory of Machine The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at

The center of the disc
An infinite distance on the plane surface
The point on the circumference situated vertically opposite to the contact point
The point of contact

Inversion
Kinematic chain
Mechanism
Structure

## Theory of Machine Hammer blow

Is the maximum horizontal unbalanced force caused by the mass provided to balance the reciprocating masses.
Varies as the square root of the speed
Is the maximum vertical unbalanced force caused by the mass added to balance the reciprocating masses
Varies inversely with the square of the speed