## Theory of Machine In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is

45 mm
Slightly less than 95 mm
95 mm
Slightly more than 95 mm

Two forks
One fork
Three forks
Four forks

## Theory of Machine The train value of a gear train is

Always greater than unity
Reciprocal of velocity ratio of a gear train
Always less than unity
Equal to velocity ratio of a gear train

## Theory of Machine The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)

(1/2) μ W R cosecα
(3/4) μ W R cosecα
μ W R cosecα
(2/3) μ W R cosecα

Turning pair
Sliding pair
Rolling pair
Cylindrical pair

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

More sensitive
Less sensitive
Isochronous
Unaffected of sensitivity