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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
During polytropic process

Steam may be wet, dry or superheated after expansion
Work is done
Heat transfer takes place across cylinder walls
All of these

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Steam Boilers, Engines, Nozzles and Turbines
Water tube boilers are those in which

Water passes through the tubes and flue gases around it
Work is done during adiabatic expansion
Flue gases pass through tubes and water around it
Change in enthalpy

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Steam Boilers, Engines, Nozzles and Turbines
The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as

Regenerative heating
Bleeding
None of these
Reheating of steam

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

Lancashire boiler
Babcock and Wilcox boiler
Cochran boiler
Locomotive boiler

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Steam Boilers, Engines, Nozzles and Turbines
Bomb calorimeter is used to determine

Lower calorific value at constant pressure
Higher calorific value at constant pressure
Lower calorific value at constant volume
Higher calorific value at constant volume

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Steam Boilers, Engines, Nozzles and Turbines
The purpose of governing in steam turbines is to

Reheat the steam and improve its quality
Completely balance against end thrust
Maintain the speed of the turbine
Reduce the effective heat drop

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