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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The discharge of steam in a convergent-divergent nozzle __________ after the throat (i.e. in the divergent portion of the nozzle)

Remains constant
None of these
Decreases
Increases

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Steam Boilers, Engines, Nozzles and Turbines
The mechanical draught _________ with the amount of smoke.

Does not effect
Decreases
Increases
None of these

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

0.582
0.546
0.577
0.601

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Steam Boilers, Engines, Nozzles and Turbines
Cut-off governing of steam engines is a method of controlling the engine output by varying

All of these
Pressure of intake steam
Temperature of intake steam
Volume of intake steam

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Steam Boilers, Engines, Nozzles and Turbines
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose, is known as

Superheater
Economizer
Air-preheater
Injector

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Steam Boilers, Engines, Nozzles and Turbines
In locomotives, the draught is produced by

Chimney
Both combined (A) and (B)
Induced draft fan
Steam jet draught

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