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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
In order to obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will

May improve/worsen depending on size
Remain unaffected
Worsen
Improve

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Steam Boilers, Engines, Nozzles and Turbines
The water tubes in a simple vertical boiler are

Inclined
Horizontal
None of the listed here
Vertical

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Steam Boilers, Engines, Nozzles and Turbines
The safety valve at superheater as compared to drum safety valve setting is set at

Lower value
Higher value
Any value
Same value

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Steam Boilers, Engines, Nozzles and Turbines
Hard coke is produced by carburization of coal at

700-850°C
Atmospheric temperature
500-600°C
950-1100°C

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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 pump
Injector
Feed check valve
Pressure gauge

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Steam Boilers, Engines, Nozzles and Turbines
When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

Increases
Decreases
None of these
Remain same

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