Mechanical Engineering MCQs

Page No. 16

In natural circulation type boiler _______________?


aheating 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

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bwater 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

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cfeed pump is employed to supplement natural circulation in water wall type furnace

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dwater is converted into steam in one . pass without any recirculation

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Duplex feed pumps are used in small steam boilers. These operate on the principle of_________________?


aDuplex feed pumps are used in small steam boilers. These operate on the principle of_________________?

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baxial flow pump

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cgear pump

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dreciprocating pump

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View Answer reciprocating pump

The diameter of internal flue tubes in a Lancashire boiler compared to its shell is_________________?


aone-half

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bone-third

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cone-fourth

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dtwo-fifth

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View Answer two-fifth

Which of the following is steam dbal?


anon-coking bituminous coal

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bbrown coal

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cpulverised coal

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dcoking bituminous coal

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The high pressure boiler is oiie producing steam at a pressure more than_________________?


aatmospheric pressure

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b5 kg/cm2

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c10 kg/cm2

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d75-80 kg/cm2

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View Answer 75-80 kg/cm2

The biggest size of thermal power unit operating in India is ________________?


a30 MW

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b60 MW

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c100 MW

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d500 MW

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View Answer 500 MW

The diameter of cylindrical shell of the Lancashire boiler is of the order of__________________?


a1 tp 1.25m

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b1 to 1.75 m

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c2 to 4 m

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d1.75 to 2.75 m

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View Answer 1.75 to 2.75 m

Which of the following is a fire tube boiler________________?


alocomotive boiler

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bBabcock and Wilcox boiler

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cStirling boiler.

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dall of the above

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View Answer locomotive boiler

Which of the following substance will have same percentage in both proximate and ultimate analysis___________________?


aash

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bvolatile matter

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cmoisture

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dhydrogen

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View Answer ash

Lancashire boiler is of____________________?


astationary

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bhorizontal type

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cnatural cirulation type

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dall of the above

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View Answer all of the above

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