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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Which of the following is not a boiler mounting?

Feed check valve
Blow off cock
Economiser
Fusible plug

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Steam Boilers, Engines, Nozzles and Turbines
Clearance ratio is the ratio of

Volume at cut-off to the swept volume
Clearance volume to the swept volume
Swept volume to the clearance volume
Clearance volume to the volume at cut-off

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Steam Boilers, Engines, Nozzles and Turbines
In a glass tube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to

Steam space
Water space also
Chimney
Superheater

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Steam Boilers, Engines, Nozzles and Turbines
O₂ content in atmospheric air on weight basis is

0.23
0.4
0.21
0.3

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Steam Boilers, Engines, Nozzles and Turbines
An economiser _________ the steam raising capacity of a boiler.

None of these
Has no effect on
Increases
Decreases

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Steam Boilers, Engines, Nozzles and Turbines
A wet vapor can be completely specified by

Pressure only
Pressure and dryness fraction
Temperature only
Dryness fraction only

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