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Mechanical Engineering - Steam Boilers and Engines

Exercise : Steam Boilers and Engines - Section 5
21.
The principal function of a stop valve is to
control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
increase the temperature of saturated steam without raising its pressure
Answer: Option
Explanation:
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22.
The length of Cornish boiler varies from
2 to 4.5 m
3 to 5 m
5 to 7.5 m
7 to 9 m
Answer: Option
Explanation:
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23.
The indicated thermal efficiency is defined as the
ratio of thermal efficiency to the Rankine efficiency
ratio of brake power to the indicated power
ratio of heat equivalent to indicated power to the energy supplied in steam
product of thermal efficiency and Rankine efficiency
Answer: Option
Explanation:
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24.
In surface condensers, the condensate and the cooling water mixes up.
True
False
Answer: Option
Explanation:
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25.
A water level indicator is a device to indicate the exact water level in the boiler at any instant.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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