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Steam Boilers, Engines, Nozzles and Turbines

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

Pressure gauge
Feed pump
Injector
Feed check valve

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Steam Boilers, Engines, Nozzles and Turbines
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is _________ the atmospheric pressure.

None of these
Lower than
Higher than
Equal to

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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
Increases
Decreases
None of these

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Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler has ________ heating surface as compared to fire tube boiler.

Equal
More
None of these
Less

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Steam Boilers, Engines, Nozzles and Turbines
In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of

40 atmospheres
20 atmospheres
10 atmospheres
30 atmospheres

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Steam Boilers, Engines, Nozzles and Turbines
Hard coke is used in

Cement industry
Domestic use
Thermal power plant
Blast furnace

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