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


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


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


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



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_________________?


baxial flow pump


cgear pump


dreciprocating pump


View Answer reciprocating pump

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


aone-half


bone-third


cone-fourth


dtwo-fifth


View Answer two-fifth

Which of the following is steam dbal?


anon-coking bituminous coal


bbrown coal


cpulverised coal


dcoking bituminous coal



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


aatmospheric pressure


b5 kg/cm2


c10 kg/cm2


d75-80 kg/cm2


View Answer 75-80 kg/cm2

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


a30 MW


b60 MW


c100 MW


d500 MW


View Answer 500 MW

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


a1 tp 1.25m


b1 to 1.75 m


c2 to 4 m


d1.75 to 2.75 m


View Answer 1.75 to 2.75 m

Which of the following is a fire tube boiler________________?


alocomotive boiler


bBabcock and Wilcox boiler


cStirling boiler.


dall of the above


View Answer locomotive boiler

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


aash


bvolatile matter


cmoisture


dhydrogen


View Answer ash

Lancashire boiler is of____________________?


astationary


bhorizontal type


cnatural cirulation type


dall of the above


View Answer all of the above

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