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

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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

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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

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cDensity of the fluid

✖


dVelocity of the fluid

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View Answer Length of the pipe

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