A. pulverised fuel fired boiler
B. cochran boiler
C. lancashire boiler
D. babcock and wilcox boiler
E. stoker fired boiler
A. can be raised rapidly
B. is raisd at slower rate
C. is raised at same rate
D. could be raised at fast/slow rate depending on design
E. none of the above is true
Steam in water tube boiler as compared to fire tube boiler_________________? Read More »
Engines, Nozzles and Turbines, Steam Boilers 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
In accelerated circulation type boiler________________? Read More »
Engines, Nozzles and Turbines, Steam Boilers 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
In forced recirculation type boiler__________________? Read More »
Engines, Nozzles and Turbines, Steam Boilers A. bismuth
B. copper
C. aluminium
D. nickel
E. iron
A. former generates steam at high pressure
B. former occupies less space for same power
C. rate of steam flow is more in former case
D. former is used for high installed capacity
E. chances of explosion are less in former case
A. avoid excessive build up of pressure
B. avoid explosion
C. extinguish fire if water level in the boiler falls below alarming limit
D. control steam dome
E. remove molten aslj
A fusible plug is fitted in small boilers in order to ___________________? Read More »
Engines, Nozzles and Turbines, Steam Boilers A. 20%
B. 40%
C. 50%
D. 75%
E. 90%
Thermal efficiency of well maintained boiler will be of the order___________________? Read More »
Engines, Nozzles and Turbines, Steam Boilers A. boiler effectiveness
B. boiler evaporative capacity
C. factor of evaporation
D. equivalent evaporation
E. boiler efficiency
A. steam evaporation rate per kg of fuel fired
B. work done in evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
C. the evaporation of 15.65 kg of water per hour from and at 100°C into dry saturated steam
D. work done by 1 kg of steam at saturation condition
E. heat consumed in evaporating 1 kg water at 0°C to steam at 100°C and 1.033 kg/cm pressure
Boiler H.P. is defined as the ________________ ? Read More »
Engines, Nozzles and Turbines, Steam Boilers