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MCQs 1: The ratio of heat utilised to produce steam and the heat liberated in furnace is known as___________________?

boiler effectiveness boiler evaporative capacity factor of evaporation equivalent evaporation boiler efficiency
Answer Explanation

MCQs 2: Thermal efficiency of well maintained boiler will be of the order___________________?

20% 40% 50% 75% 90%
Answer Explanation

MCQs 3: A fusible plug is fitted in small boilers in order to ___________________?

avoid excessive build up of pressure avoid explosion extinguish fire if water level in the boiler falls below alarming limit control steam dome remove molten aslj
Answer Explanation

MCQs 4: Pick up the wrong statement about water tube boiler in comparison to fire tube boilers ______________________?

former generates steam at high pressure former occupies less space for same power rate of steam flow is more in former case former is used for high installed capacity chances of explosion are less in former case
Answer Explanation

MCQs 5: Fusible plug for boilers is made of fusible metal containing tin, lead, and___________________?

bismuth copper aluminium nickel iron
Answer Explanation

MCQs 6: In forced recirculation type boiler__________________?

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 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 mixtur feed pump is employed to supplement natural circulation in water wall type furnace water is converted into steam in one pass without any recirculation heating of water takes place in stages
Answer Explanation

MCQs 7: In accelerated circulation type boiler________________?

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 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 mixtu feed pump is employed to supplement natural circulation in water wall type furnace water is converted into steam in one pass without any recirculation water is fed under high pressure and high velocity
Answer Explanation

MCQs 8: Steam in water tube boiler as compared to fire tube boiler_________________?

can be raised rapidly is raisd at slower rate is raised at same rate could be raised at fast/slow rate depending on design none of the above is true
Answer Explanation

MCQs 9: It is required to produce large amount of steam at low pressure. Which boiler should be used ?

pulverised fuel fired boiler cochran boiler lancashire boiler babcock and wilcox boiler stoker fired boiler
Answer Explanation

MCQs 10: Which type of boiler can meet rapid changes of load____________________?

vertical fire tube type horizontal fire tube type horizontal water tube type vertical water tube type forced circulation type
Answer Explanation

MCQs 11: Boiler stays are used to___________________?

prevent flat surfaces under pressure from tearing apart take care of failure in shear take care of failure in compression provide support for boiler provide foundation of boiler
Answer Explanation

MCQs 12: Size of boiler tubes is specified by___________________?

mean diameter and thickness inside diameter and thickness outside diameter and thickness outside diameter and inside diameter outside diameter alone
Answer Explanation

MCQs 13: The major axis of elliptical manholes on the shell should be provided___________________?

longitudinally circumferentially on dished end anywhere vertically
Answer Explanation

MCQs 14: With increase in load, radiant super heater has____________________?

drooping characteristic linear characterisstic rising characteristic flat characteristic none of the above
Answer Explanation

MCQs 15: The diameter of fire tubes in Cochran boiler is of the order of___________________?

2 cm 6 Cm 8 cm 12 cm 15 cm
Answer Explanation

MCQs 16: A safety valve in a locomotive starts leaking. The leaking medium will be_________________?

water dry steam wet steam super heated steam supersaturated steam
Answer Explanation

MCQs 17: In regenerative air preheater, the heat is transferred _____________________?

from a metal wall from one medium to another from heating an intermediateanaterial and then heating the air from this material by direct mixing heat is transferred by bleeding some gas from furnace none of the above
Answer Explanation

MCQs 18: The pressure of reheat steam after passing through reheater compared to inlet condition is _________________?

more less equal may be more or less depending on capacity of reheater none of the above
Answer Explanation

MCQs 19: The safety valve at superheater as compared to drum safety valve setting is set at___________________?

higher value lower value same value any value none of the above
Answer Explanation

MCQs 20: Steam exhaust from high pressure turbine is reheated in _____________________?

boiler drum superheater tubes economiser a separate coil a separate coil located in convection path
Answer Explanation

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