Question

The maximum fluctuation of speed is the

(a) difference of minimum fluctuation of speed and the mean speed

(b) difference of the maximum and minimum speeds

(c) sum of the maximum and minimum speeds

(d) variations of speed above and below the mean resisting torque line

I had been asked this question by my school teacher while I was bunking the class.

Origin of the question is Energy Stored in a Flywheel in section Turning Moment Diagrams and Flywheel of Machine Dynamics

Answer 1

Correct choice is (b) difference of the maximum and minimum speeds

The best I can explain: The difference between the maximum and minimum speeds during a cycle is called the maximum fluctuation of speed.

The ratio of the maximum fluctuation of speed to the mean speed is called coefficient of fluctuation of speed.