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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called

Boiler efficiency
Vacuum efficiency
Nozzle efficiency
Condenser efficiency

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Steam Boilers, Engines, Nozzles and Turbines
A boiler in India should conform to safety regulations of

BS
ASTM
IBR
DIN

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Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

539 kg.m
421 kg.m
102 kg.m
421 kg.m

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Steam Boilers, Engines, Nozzles and Turbines
Evaporative capacity of boiler is expressed as

kg of fuel fired
kg of steam produced per kg of fuel fifed
Steam pressure produced
kg of steam produced

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Steam Boilers, Engines, Nozzles and Turbines
Stage efficiency is also known as

Nozzle efficiency
None of these
Diagram efficiency
Gross efficiency

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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

Superheater
Air-preheater
Economizer
Injector

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