Theory of Machine
The method of direct and reverse cranks is used in engines for

The control of speed fluctuations
Kinematic analysis
Balancing of forces and couples
Vibration analysis

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
The maximum fluctuation of speed is the

Difference of minimum fluctuation of speed and the mean speed
Variations of speed above and below the mean resisting torque line
Difference of the maximum and minimum speeds
Sum of maximum and minimum speeds

ANSWER DOWNLOAD EXAMIANS APP

Theory of Machine
Crowning on pulleys helps

For automatic adjustment of belt position so that belt runs centrally
In increasing velocity ratio
In decreasing the slip of the belt
Increase belt and pulley life

ANSWER DOWNLOAD EXAMIANS APP