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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The function of injector used in small steam plants is to

Pump feed water
Create vacuum in furnace
Dose chemicals in feed water
Create vacuum at turbine exhaust

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Steam Boilers, Engines, Nozzles and Turbines
The diameter of cylindrical shell of the Lancashire boiler is of the order of

2 to 4 m
1 to 1.25 m
1.75 to 2.75 m
1 to 1.75 m

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Steam Boilers, Engines, Nozzles and Turbines
The cylinder condensation or missing quantity may be reduced by

Superheating the steam supplied to the engine cylinder
Keeping the expansion ratio small in each cylinder
All of these
The efficient steam jacketing of the cylinder walls

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Steam Boilers, Engines, Nozzles and Turbines
Which of the following boiler is best suited to meet the fluctuating demand of steam?

Lancashire boiler
Babcock and Wilcox boiler
Locomotive boiler
Cornish boiler

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Steam Boilers, Engines, Nozzles and Turbines
The rate of discharge through the nozzle ___ when the exit pressure is gradually reduced.

Increases
Decreases
Remains same
None of the listed here

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Steam Boilers, Engines, Nozzles and Turbines
The crown of the fire box is made hemispherical in order to

Withstand pressure inside boiler
Give maximum space
Give maximum strength
Resist intense heat in fire box

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