Mechanical Engineering - Steam Boilers and Engines

21.
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as
internally fired boiler
externally fired boiler
natural circulation boiler
forced circulation boiler
Answer: Option
Explanation:
No answer description is available. Let's discuss.

22.
The ratio of heat equivalent to brake power to the energy supplied in steam is known as
mechanical efficiency
overall efficiency
indicated thermal efficiency
brake thermal efficiency
Answer: Option
Explanation:
No answer description is available. Let's discuss.

23.
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
throttle governing
cut-off governing
by-pass governing
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

24.
The length of Lancashire boiler varies from
5 to 6 m
6 to 7 m
7.25 to 9 m
9 to 10 m
Answer: Option
Explanation:
No answer description is available. Let's discuss.

25.
The ratio of brake power to the indicated power is known as
mechanical efficiency
overall efficiency
indicated thermal efficiency
brake thermal efficiency
Answer: Option
Explanation:
No answer description is available. Let's discuss.