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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines
The amount of water evaporated from feed water at _________ into dry and saturated steam at 100° C at normal atmospheric pressure is called equivalent evaporation from and at 100° C.

40°C
60°C
100°C
0°C

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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

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

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Steam Boilers, Engines, Nozzles and Turbines
The heat loss in a boiler takes place in the form of

All of these
Heat carried away by ash
Moisture present in fuel and steam formed by combustion of hydrogen in fuel
Heat carried away by flue gases

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Steam Boilers, Engines, Nozzles and Turbines
Desecration of feed water is carried out because it reduces

Cavitation of boiler feed pumps
Heat transfer coefficient
Corrosion caused by oxygen
pH value of water

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Steam Boilers, Engines, Nozzles and Turbines
The draught in locomotive boilers is produced by a

Steam jet
None of these
Centrifugal fan
Chimney

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Steam Boilers, Engines, Nozzles and Turbines
Which is not correct statement about pulverized fuel firing?

Fuel burns economically
Heat release can be easily controlled
High burning rate is possible
It is the best technique for burning high ash content fuel having low fusion ash

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