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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Which device is used in thermal power plants to reduce level of pollution?

Precipitator
Smoke meter
Chimney
Induced draft fan

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Cochran boiler are

None of these
Horizontal
Inclined
Vertical

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Steam Boilers, Engines, Nozzles and Turbines
Alkaline pyrogallate is used in Orsat's apparatus for absorption of

CO
CO₂
O₂
N₂

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Steam Boilers, Engines, Nozzles and Turbines
For the same length of stroke and speed of crankshaft, the piston speed for a double acting steam engine is _________ the piston speed of single acting steam engine.

Twice
Three times
Equal to
Four times

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Steam Boilers, Engines, Nozzles and Turbines
By compounding the expansion of steam in two or more cylinders, the length of stroke

Decreases
Increases
None of these
Does not change

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

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

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