Question

In the given figure, the x – axis represents radius of rotation and the y axis represents the controlling force. This graph is known as _________

(a) Controlling force diagram of Porter governor

(b) Controlling force diagram of Hartnell governor

(c) Controlling force diagram of isochronous governor

(d) Controlling force diagram of a general governor

This question was posed to me in unit test.

Question is taken from Controlling Force Diagram for a Porter Governor in chapter Governors of Machine Dynamics

Answer 1

The correct option is (a) Controlling force diagram of Porter governor

For explanation I would say: The given figure is a plot between the controlling force and the radius of rotation, from the curve it is factually known that it represents the controlling force diagram of a porter governor.