## Theory of Machine The factor which affects the critical speed of a shaft is

All of the listed here
Diameter of disc
Span of shaft
Eccentricity

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

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

## Theory of Machine The danger of breakage and vibration is maximum

Near the critical speed
Below the critical speed
Above the critical speed
None of these

Remain same
Increases
None of these
Decreases

## Theory of Machine The relation between number of links (l) and number of joints (j) in a kinematic chain is

l = (2/3).(j + 2)
l = (3/4).(j + 3)
l = j + 4
l = (1/2).(j + 2)

## Theory of Machine Instantaneous center of rotation of a link in a four bar mechanism lies on

Right side pivot of this link
Can’t occur
A point obtained by intersection on extending adjoining links
Left side pivot of this link