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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
A turbine is said to have an axial discharge when the steam leaves the blade tip at _________ to the direction of the blade motion.

60°
180°
90°
270°

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Steam Boilers, Engines, Nozzles and Turbines
In a Parson's turbine stage, blade velocity is 320 m/s at the mean radius and rotor blade exit angle is 30°. For minimum kinetic energy of the steam leaving the stage, the steam velocity at the exit of the rotor will be

640 m/s
640/3 m/s
160/3 m/s
320/3 m/s

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Steam Boilers, Engines, Nozzles and Turbines
In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts. and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is

0.5
0.4
0.8
0.25

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Steam Boilers, Engines, Nozzles and Turbines
The number of drums in Benson steam generator is

Two
One
No drum
One steam drum and one water drum

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Steam Boilers, Engines, Nozzles and Turbines
In a nozzle, whole frictional loss is assumed to occur between

All of these
Inlet and outlet
Inlet and throat
Throat and exit

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Steam Boilers, Engines, Nozzles and Turbines
The selection of type and size of a steam boiler depends upon

All of these
The fuel and water available
The power required and working pressure
The geographical position of the power house

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