Theory of Machine
The retardation of a flat faced follower when it has contact at the apex of the nose of a circular arc cam, is given by (where OQ = Distance between the centre of circular flank and centre of nose)

ω² × OQ cosθ
ω² × OQ
ω² × OQ tanθ
ω² × OQ sinθ

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Theory of Machine
Which is the false statement about the properties of 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 have no linear velocities relative to each other at the instantaneous center
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

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Theory of Machine
The maximum fluctuation of speed is the

Variations of speed above and below the mean resisting torque line
Difference of minimum fluctuation of speed and the mean speed
Sum of maximum and minimum speeds
Difference of the maximum and minimum speeds

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Theory of Machine
In a hydrodynamic journal bearing, there is

A thick film of lubricant between the journal and the bearing
No lubricant between the journal and the bearing
A forced lubricant between the journal and the bearing
A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing

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