Steam Boilers and Engines MCQ with Answers

171) The ratio of heat equivalent to brake power to the energy supplied in steam is known as

Answer is:

brake thermal efficiency

172) When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as

Answer is:

throttle governing

Explanation:

The throttle governing, of simple steam engines, is a method of controlling the engine output by varying pressure of the intake steam. The pressure of intake steam is varied by opening or closing the throttle valve under the control of a centrifugal governor.

173) The length of Lancashire boiler varies from

Answer is:

7.25 to 9 m

174) The ratio of brake power to the indicated power is known as

Answer is:

mechanical efficiency

175) The draught may be produced by a

Answer is:

all of these

Explanation:

The draught may be produced by a
* mechanical fan
* chimney
* a steam jet