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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
Steam turbines may be classified according to

Number of stages
All of these
Mode of steam action
Direction of steam flow

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Steam Boilers, Engines, Nozzles and Turbines
Calorific value of coal is of the order of

200-400 kcal/ kg
5000-8000 kcal/ kg
800-1200 kcal/ kg
2000-4000 kcal/ kg

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Steam Boilers, Engines, Nozzles and Turbines
For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has

Heating surface depends on other parameters
Less heating surface
More heating surface
Equal heating surface

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Steam Boilers, Engines, Nozzles and Turbines
The water tubes in a Babcock and Wilcox boiler are

Horizontal
Horizontal and inclined
Inclined
Vertical

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Steam Boilers, Engines, Nozzles and Turbines
The basic purpose of drum in boiler is to

Serve as storage of feed water for water wall
Serve as storage of steam
Remove salts from water
Separate steam from water

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Steam Boilers, Engines, Nozzles and Turbines
Primary air is the air used to

Provide air around burners for obtaining optimum combustion
Air delivered by forced draft fan
Transport and dry the coal
Convert CO (formed in lower zone of furnace) into CO₂ at higher zone

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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