Chemical Engineering MCQs

Page No. 792

A fire tube boiler is limited to a maximum steam pressure of about ______________ kg/cm2 ?


a6


b18


c38


d52


View Answer 18

Water hammer is caused in steam carrying pipelines, because of ______________________?


aPartial condensation of steam


bVibration of the pipeline


cHigh degree of superheat of steam


dIts exposure to torrential rain



In the diving apparatus, helium is used along with oxygen, because it is ____________________?


aEasily available


bNot soluble in blood at high pressure


cLighter than nitrogen


dCompletely miscible with oxygen



Probability of cavitation occuring becomes very high, when the local _______________ resulting ?


aPressure falls below the vapour pressure


bPressure becomes very high


cTemperature becomes low


dAll A, B & C


View Answer All A, B & C

The approximate height of a blast furnace having a useful volume of 2000 m3 is about _______________ metres ?


a25


b35


c55


d75


View Answer 55

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about ____________________?


a9 : 1


b17 : 1


c23 : 1


d29 : 1


View Answer 17 : 1

Which of the following gases cause global warming ?


aCarbon monoxide


bCarbon monoxide


cNitrogen


dOzone


View Answer Carbon monoxide

Potable water means the water used for____________________?


aFire-fighting


bCooling


cDrinking


dEvaporation to produce steam


View Answer Drinking

Softening of hardened steel is done by its____________________?


aNormalising


bTempering


cAnnealing


dCarburising


View Answer Normalising

Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the___________________?


aLength of the pipe


bDiameter of the pipe


cDensity of the fluid


dVelocity of the fluid


View Answer Length of the pipe

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