Category: Steam Boilers, Engines, Nozzles and Turbines

A. 100°C
B. above dew-point temperature of flue gases
C. below dew-point temperature of flue gases
D. less than wet bulb temperature of flue gases
E. above wet bulb temperature of flue gases

A. heat transfer takes place across cylinder walls
B. work is done
C. steam may be wet, dry or superheated after expansion
D. all of the above
E. none of the above

A. it has heating value
B. it helps in electrostatic precipitation of ash in flue-gases
C. it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
D. it erodes furnace walls
E. none of the above

A. provide air around burners for obtaining optimum combustion
B. transport and dry the coal
C. convert CO (formed in lower zone of furnace) into C02 at higher zone
D. air delivered by induced draft fan
E. air fed to pulverisers

A. induced draft fan and chimney
B. induced draft fan and forced draft fan
C. forced draft fan and chimney
D. any one of the above
E. none of the above

A. locomotive boiler
B. Babcock and Wilcox boiler
C. Stirling boiler.
D. all of the above
E. none of the above

A. 21%
B. 23%
D. 30%
D. 40%
E. 70%

A. volume
B. pressure
C. entropy
D. enthalpy
E. none of the above

A. evaporative capacity
B. factor of evaporation
C. equivalent evaporation
D. one boiler h.p.
E. boiler efficiency

A. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of stdam bubbles and hot water which rise to durm
B. water is supplied in drum and through downcomers” located in atmospheric conditon it passes to the water wall and rises to durm in the from of mixture of water and steam
C. feed pump is employed to supplement natural circulation in water wall type furnace
E. water is converted into steam in one pass without any recirculation
E. water is fed under high pressure and high velocity