Theory of Machine
It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

Universal joint
Knuckle joint
Flexible coupling
Oldham's coupling

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
In gears, interference takes place when

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

ANSWER DOWNLOAD EXAMIANS APP