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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The diameter of a cylindrical shell of a Scotch marine boiler varies from

2.5 to 3.5 m
1.5 to 2 m
3.5 to 4.5 m
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of

Fouling of heat transfer surfaces
Raising of steam temperature
High calorific value coal being burnt
Higher effectiveness of boiler

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following statement is correct for steam turbines as compared to reciprocating steam engines?

A steam turbine develops higher speeds
The efficiency of steam turbine is higher
All of these
The steam consumption is less

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Steam Boilers, Engines, Nozzles and Turbines
Superheating of steam is done at

Constant entropy
Constant pressure
Constant volume
Constant temperature

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Steam Boilers, Engines, Nozzles and Turbines
The missing quantity per stroke is equal to

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

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

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