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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A supercritical boiler is one that operates above the pressure and temperature of following values

100 kg/cm² and 540°C
1 kg/cm² and 100°C
218 kg/cm² abs and 373°C
218 kg/cm² abs and 540°C

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of heat equivalent to brake power to the energy supplied in steam is known as

Overall efficiency
Brake thermal efficiency
Indicated thermal efficiency
Mechanical efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

Decreases
Remains constant
None of these
Increases

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Steam Boilers, Engines, Nozzles and Turbines
Curtis turbine is a

Simple reaction turbine
Pressure compounded turbine
Velocity compounded turbine
Pressure-velocity compounded turbine

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following is a water tube boiler?

Cochran boiler
Babcock and Wilcox boiler
Locomotive boiler
Lancashire boiler

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

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

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