The spring controlled governor is

| The spring controlled governor is

A. Hartnell

B. Hartung

C. Pickering

D. All the above

Please scroll down to see the correct answer and solution guide.

Explanation:

Governor:

It is a device used for maintaining a constant mean speed of rotation of the crankshaft over long periods during which the load of the engine may vary.
Governor maintains constant speed by controlling the supply of working fluid as load varies.

Governors are classified as:

Centrifugal Governors are classified as:

Dead Weight Governors:
- Porter governor
- Proell governor
Spring controlled governors:
- Hartnell governor
- Hartung governor
- Pickering governor

Hence all the given governors are Spring loaded governors.