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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The economiser is used in boilers to

Increase flue gas temperature
Increase thermal efficiency of boiler
Economize on fuel
Extract heat from the exhaust flue gases

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Steam Boilers, Engines, Nozzles and Turbines
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 known as

Economizer
Superheater
Injector
Air-preheater

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Steam Boilers, Engines, Nozzles and Turbines
1 kg.m is equal to

None of these
427 Joules
9.81 Joules
102 Joules

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing as compared to throttle governing is

Less efficient and less economical
More efficient and more economical
Less efficient and more economical
More efficient and less economical

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Steam Boilers, Engines, Nozzles and Turbines
A safety valve mainly used with locomotive and marine boilers is

Lever safety valve
Spring loaded safety valve
High steam and low water safety valve
Dead weight safety valve

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Steam Boilers, Engines, Nozzles and Turbines
Latent heat of dry steam at atmospheric pressure is equal to

539 BTU/ lb
100 kcal/ kg
539 kcal/ kg
427 kcal/ kg

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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