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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The friction in the nozzle __________ exit velocity of steam.

Decreases
Has no effect on
None of these
Increases

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Steam Boilers, Engines, Nozzles and Turbines
The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as

Feed check valve
Pressure gauge
Feed pump
Injector

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Steam Boilers, Engines, Nozzles and Turbines
In a uniflow engine

Steam enters at the centre and exhausts at the other end
Steam enters and exhausts through the same port
None of these
Steam enters at one end and exhausts at the centre

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The best suited coal for chain or traveling grate stoker boiler is

Pulverized coal
Coking coal
Non-coking or free burning coal
High sulphur coal

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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.

More
Less
None of these
Same

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