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Steam Boilers QUESTIONS AND ANSWERS

Mechanical Engineering : Steam Boilers QUESTIONS AND ANSWERS :: part4 : 16 to 20

Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

16.Duplex feed pumps are used in small steam boilers. These operate on the principle of

centrifugal pump

axial flow pump

gear pump

ejector pump

reciprocating pump.

17.The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is

less

same

could be more or less depending on other factors

none of the above.

18.The high pressure boiler is oiie producing steam at a pressure more than

atmospheric pressure

5 kg/cm2

10 kg/cm2

40 kg/cm2

75-80 kg/cm2.

19.In natural circulation 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 durm and through down-comers located in atmospheric conditon it passes to the water wall and rises to drum in the form of mixture of water and steam

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 at atmospheric pressure.

20.The best suited coal for chain or travelling grate stoker boiler is

coking coal

non coking or free burning coal

pulverised coal

high sulphur coal

least ash content coal.

More Steam Boilers QUESTIONS AND ANSWERS available in next pages