## Theory of Machine Which gear train is used for higher velocity ratios in a small space?

Compound gear train
Simple gear train
Reverted gear train
Epicyclic gear train

## Theory of Machine In a system subjected to damped forced vibrations, the ratio of maximum displacement to the static deflection is known as

Magnification factor
Critical damping ratio
Damping factor
Logarithmic decrement

## 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
Slightly more than 95 mm
95 mm

## Theory of Machine In gears, interference takes place when

Gear teeth are undercut
The tip of a tooth of a mating gear digs into the portion between base and root circles
Gears do not move smoothly in the absence of lubrication
Pitch of the gears is not same

## Theory of Machine When two links are connected by a pin joint, their instantaneous center lies

At the center of curvature
At the center of circle
On their point of contact
At the pin joint

## Theory of Machine If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be

Same as the first one
One and a half times the first one
One fourth of the first one
Four times the first one