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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
Chimney
Induced draft fan
Smoke meter

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Steam Boilers, Engines, Nozzles and Turbines
The height of chimney in a power plant is governed by

The draft to be created
Control of pollution
Quantity of flue gases to be handled
Limitation of construction facilities

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Steam Boilers, Engines, Nozzles and Turbines
The Locomotive boiler has

147 fire tubes and 34 superheated tubes
157 fire tubes and 24 superheated tubes
167 fire tubes and 14 superheated tubes
137 fire tubes and 44 superheated tubes

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Steam Boilers, Engines, Nozzles and Turbines
The diameters of fire tubes and superheater tubes in locomotive boiler are

47.5 mm, 130 mm
24.5 mm, 65 mm
65.5 mm, 210 mm
32.5 mm, 180 mm

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Steam Boilers, Engines, Nozzles and Turbines
The fire tubes in a Cochran boiler usually have _________ diameter.

72.5 mm
6.25 mm
62.5 mm
92.5 mm

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the work-done on the blades per kg of steam to the total energy supplied per stage per kg of steam is called

Blading efficiency
Mechanical efficiency
Stage efficiency
Nozzle efficiency

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