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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is

0.007 bar
0.06 bar
0.053 bar
0.067 bar

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Steam Boilers, Engines, Nozzles and Turbines
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine

Benson boiler
Locomotive boiler
Lancashire boiler
Babcock and Wilcox boiler

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Steam Boilers, Engines, Nozzles and Turbines
Orsat meter is used for

Measuring smoke density of flue gases
Volumetric analysis of the flue gases
Mass flow of the flue gases
Gravimetric analysis of the flue gases

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

0.577
0.582
0.601
0.546

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Steam Boilers, Engines, Nozzles and Turbines
The heat loss in a boiler takes place in the form of

All of these
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
Heat carried away by flue gases
Heat carried away by ash

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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
Injector
Superheater
Air-preheater

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