Theory of Machine
Flexible coupling is used because

It is easy to engage and disengage
It prevents shock transmission and eliminates stress reversals
It transmits shocks gradually
It is easy to disassemble

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
The maximum fluctuation of energy is the

Variations of energy above and below the mean resisting torque line
Difference between the maximum and minimum energies
Sum of the maximum and minimum energies
Ratio of the mean resisting torque to the work-done per cycle

ANSWER DOWNLOAD EXAMIANS APP