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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Which of the following boiler works on a forced circulation of water?

Benson boiler
Loeffler boiler
Lamont boiler
All of these

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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
The missing quantity per stroke is equal to

Mass of cushion steam + cylinder feed
Mass of cushion steam + indicated mass of steam
Cylinder feed + indicated mass of steam
Cylinder feed indicated mass of steam

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially wet steam is

0.601
0.577
0.582
0.546

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Steam Boilers, Engines, Nozzles and Turbines
Efficiency of a thermal cycle increases by

Both (A) and (B)
Regeneration
Reheating of steam
Cooling of steam

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Steam Boilers, Engines, Nozzles and Turbines
Lancashire boiler has __________ internal flue tubes.

Four
Two
Three
One

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