Mechanical Engineering - Steam Boilers and Engines

6.
For maximum discharge through a chimney, the temperature of flue gases inside the chimney should the slightly more than the atmospheric temperature.
Correct
Incorrect
Answer: Option
Explanation:
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7.
The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler.
True
False
Answer: Option
Explanation:
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8.
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is knwon as
superheater
air preheater
economiser
injector
Answer: Option
Explanation:
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9.
In a fire tube boiler, the water is contained inside the tubes which are surrounded by flames and hot gases from outside.
True
False
Answer: Option
Explanation:
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10.
Steam engines are called external combustion engines.
Yes
No
Answer: Option
Explanation:
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