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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
By compounding the expansion of steam in two or more cylinders, the length of stroke

Does not change
None of these
Decreases
Increases

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Steam Boilers, Engines, Nozzles and Turbines
The velocity of whirl at outlet for an axial discharge turbine is

Maximum
Minimum
Zero
None of these

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Steam Boilers, Engines, Nozzles and Turbines
The draught produced by a steam jet issuing from a nozzle placed in the ash-pit under the fire grate of the furnace is called

Induced steam jet draught
Chimney draught
Forced steam jet draught
None of these

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Steam Boilers, Engines, Nozzles and Turbines
Water boils when its vapor pressure

Equals that of the surroundings
Equals the pressure of water in the container
Equals 760 mm of mercury
Equals to atmospheric pressure

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Steam Boilers, Engines, Nozzles and Turbines
The value of diagram factor depends upon

All of these
Initial pressure of steam
Back pressure
Initial conditions of steam

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Steam Boilers, Engines, Nozzles and Turbines
De-Laval turbines are mostly used

For small power purposes and low speeds
Where low speeds are required
For small power purposes and high speeds
For large power purposes

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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