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

Oldham's coupling
Universal joint
Flexible coupling
Knuckle joint

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
The inversion of a mechanism is

Obtained by reversing the input and output motion
Turning its upside down
Obtained by fixing different links in a kinematic chain
Changing of a higher pair to a lower pair

ANSWER DOWNLOAD EXAMIANS APP