## Theory of Machine In order to balance the reciprocating masses,

Secondary forces and couples must be balanced
None of these
Primary forces and couples must be balanced
Both (A) and (B)

## Theory of Machine The absolute acceleration of any point ‘P’ in a link about center of rotation ‘O’ is

None of the listed here
At 45° to PO
Perpendicular to PO
Along PO

## Theory of Machine Which is the false statement about the properties of instantaneous center?

The two rigid links have no linear velocities relative to each other at the instantaneous center
At the instantaneous center of rotation, one rigid link rotates instantaneously relative to another for the configuration of mechanism considered
The double center can be denoted either by O2 or O12, but proper selection should be made
The two rigid links which have no linear velocity relative to each other at this center have the same linear velocity to the third rigid link

## Theory of Machine Oldham’s coupling is an inversion of the kinematic chain used in

Rotary engine
Whitworth quick return mechanism
Elliptical trammels
Universal joint

## Theory of Machine The frequency of oscillation of a compound pendulum is

2π. √[(kG² + h²)/gh]
(1/2π). √[(kG² + h²)/gh]
2π. √[gh/(kG² + h²)]
(1/2π). √[gh/(kG² + h²)]

## Theory of Machine In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be

Unaffected of sensitivity
More sensitive
Less sensitive
Isochronous