## Theory of Machine Which of the following mechanism is an approximate straight line motion mechanism?

Grasshopper mechanism
All of these
Watt's mechanism
Robert's mechanism

## Theory of Machine The contact ratio is given by

(Length of the arc of contact)/(Circular pitch)
(Length of the arc of approach)/cosφ
(Length of path of recess)/(Circular pitch)
(Length of the path of approach)/(Circular pitch)

## Theory of Machine A body in motion will be subjected to Coriolis acceleration when that body is

In plane rotation with variable velocity
In plane motion which is a resultant of plane translation and rotation
In plane translation with variable velocity
Restrained to rotate while sliding over another body

## Theory of Machine Which of the following is a pendulum type governor?

Porter governor
None of these
Hartnell governor
Watt governor

## Theory of Machine Critical damping is a function of

Mass and damping coefficient
Mass and natural frequency
Mass and stiffness
Damping coefficient and natural frequency

30°
10°
14°
20°