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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The condition of steam in boiler drum is always

Saturated
Dry
Supersaturated
Wet

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Steam Boilers, Engines, Nozzles and Turbines
The actual power generated in the engine cylinder is called

Frictional power
None of these
Indicated power
Brake power

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Steam Boilers, Engines, Nozzles and Turbines
When the total heat of steam is h kJ/kg and the sensible heat of feed water is hf1 kJ/kg, then the factor of evaporation is given by

(h - hf1)/2257
None of these
(h × hf1)/2257
(h + hf1)/2257

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

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

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of brake power to the indicated power is known as

Mechanical efficiency
Indicated thermal efficiency
Brake thermal efficiency
Overall efficiency

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Steam Boilers, Engines, Nozzles and Turbines
The specific volume of steam with increase in pressure decreases

Inversely
Linearly
Rapidly first and then slowly
Slowly first and then rapidly

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