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Steam Boilers, Engines, Nozzles and Turbines

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

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

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Steam Boilers, Engines, Nozzles and Turbines
Proximate analysis of fuel is determination of percentage of

Lower calorific value
Fixed carbon, ash, volatile matter, moisture
Carbon, hydrogen, nitrogen, sulphur, moisture
Higher calorific value

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
The efficiency of reaction turbine is maximum when (where α = Angle made by the absolute velocity ‘V’ at inlet)

Vb = V cos α
Vb = 0.5 V cosα
Vb = 0.5 V² cosα
Vb = V² cos α

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Steam Boilers, Engines, Nozzles and Turbines
Pick up wrong statement about desired properties of a good fuel

Ease in storing
High calorific value
Produce minimum smoke and gases
High ignition point

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Steam Boilers, Engines, Nozzles and Turbines
Pulverized fuel is used for

More calorific value
Less radiation loss
Medium sized units
Better burning

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MORE MCQ ON Steam Boilers, Engines, Nozzles and Turbines

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