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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Sulphur in coal results in

All of these
Facilitating ash precipitation
Corroding air heaters
Spontaneous combustion during coal storage

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

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

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Steam Boilers, Engines, Nozzles and Turbines
A device used to heat feed water by utilizing the heat in me exhaust flue gases before leaving through the chimney, is known as

Stop valve
Superheater
Fusible plug
Economizer

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Steam Boilers, Engines, Nozzles and Turbines
The length of Lancashire boiler varies from

6 to 7 m
9 to 10 m
5 to 6 m
7.25 to 9 m

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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
Equal to
Higher than
Lower than

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of fire tube of Cornish boiler compared to its shell is

One half
One third
One fifth
One fourth

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