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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A closed vessel made of steel and used for the generation of steam is called a

Steam boiler
Steam turbine
Steam condenser
Steam injector

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Steam Boilers, Engines, Nozzles and Turbines
The shell of the Cochran boiler is made hemispherical

None of these
To withstand the pressure of steam inside the boiler
Both (A) and (B)
To give maximum space and strength

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Steam Boilers, Engines, Nozzles and Turbines
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos 2α, where α is the nozzle exit flow angle, if the

Blade velocity coefficient is unity
Blade solidity is 0.65
Blades are equiangular
Blades are equiangular and frictionless

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following are boiler accessories?

Economizer
None of these
Both (A) and (B)
Superheater

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

0.577
0.546
0.582
0.601

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Steam Boilers, Engines, Nozzles and Turbines
Steam exhaust from high pressure turbine is reheated in

A separate coil located in convection path
Economizer
Boiler drums
Superheater tubes

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