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.Management Sciences
Category: Steam Boilers, Engines, Nozzles and Turbines
In ordetjo obtain superheated steam, a superheater is added in an existing boiler. As as result, furnace vacuum will _________________?
A. remain unaffected
B. improve C. worsen
C. may improve/worsen depending on size
D. unpredictable
Adiabatic process is________________?
A. essentially an isentropic process
B. non-heat transfer process
C. reversible process
D. constant temperature process
E. constant enthalpy process
In forced recirculation type boiler__________________?
A. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
B. water is supplied in drum and through down-comers located in atmospheric condition it passes to the water wall and rises to drum in the form of mixture of water and steam
C. feed pump is employed to supplement natural circulation in water wall type furnace
D. water is converted into steam in one pass without any recirculation
E. heating of water takes place in stages
The water tubes in a babcock and wilcox boiler are__________________?
A. horizontal
B. vertical
C. inclined
D. horizontal and inclined
E. vertical and inclined
Thermal efficiency of well maintained boiler will be of the order___________________?
A. 20%
B. 40%
C. 50%
D. 75%
E. 90%
The steam temperature with increase in load in case of a boiler fitted with radiation super heater________________?
A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. unpredictable
The number of drums in Benson steam generator is_________________?
A. one
B. two
C. one steam drum and one water drum
D. no drum
E. none of the above
The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?
A. boiler effectiveness
B. boiler evaporative capacity
C. factor of evaporation
D. equivalent evaporation
E. boiler efficiency
Fire tube boilers are those in which__________________?
A. flue gases pass through tubes and water around it
B. water passes through the tubes and flue gases around it
C. forced circulation takes place
D. tubes are laid vertically
E. none of the above
The overall efficiency of thermal power plant is________________?
A. boiler efficiency, turhine efficiecny, generator efficiency
B. all the three above plus gas cycle efficiency
C. carnot cycle efficiency
D. regenerative cycle efficiency
E. rankine cycle efficiency
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