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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

Chimney
None of these
Steam jet
Centrifugal fan

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Steam Boilers, Engines, Nozzles and Turbines
On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by

Curved line
Vertical straight line
Horizontal straight line
Straight inclined line

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Steam Boilers, Engines, Nozzles and Turbines
The fittings mounted on the boiler for its proper and safe functioning is a

Pressure gauge
Safety valve
All of these
Water level indicator

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Steam Boilers, Engines, Nozzles and Turbines
Over fire burning is the phenomenon of

Burning CO and unburnt in upper zone of furnace by supplying more air
Fuel bed firing
Supply of excess, air
Supply of excess coal

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure gives the velocity of steam at the throat

Less than the velocity of sound
None of these
Equal to the velocity of sound
More than the velocity of sound

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Steam Boilers, Engines, Nozzles and Turbines
The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.

Same
None of these
Less
More

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