Chemical Engineering MCQs

Page No. 767

Hooke’s law_______________________?


aApplies to elastic deformation


bApplies beyond limit of proportionality in stress-strain curve


cStates that stress is inversely proportional to strain upto elastic limit


dNone of these



In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?


aMechanical


bOverall


cVolumetric


dImpeller


View Answer Mechanical

Increase in temperature, in general results in the____________________?


aDecrease in the viscosities of both liquids & gases


bIncrease in the viscosities of both liquids & gases


cIncrease in the viscosity of liquids and decrease in that of gases


dDecrease in the viscosity of liquids and increase in that of gases



Which of the following fastening devices has its both ends threaded ?


aBolt


bStud


cSet screw


dSplit nut


View Answer Stud

Dryness fraction of dry steam is_________________?


a0


b


c1


d0.5


View Answer 1

Specific _________________ is a dimensionless quantity ?


aHeat


bHumidity


cWeight


dNone of these


View Answer None of these

‘GASOHOL’ widely used in Brazil as a motor fuel is a mixture of alcohol and____________________?


aPetrol


bLPG


cLight hydrocarbon gases (e.g. butane or propane)


dNone of these


View Answer Petrol

Which of the following processes follows the hardening process for reducing the hardening strains & increasing the toughness of the steel part ?


aAnodising


bTempering


cCarburising


dAnnealing


View Answer Tempering

Electrochemical corrosion can occur, only if ________________ is present in contact with metal?


aAir


bOxygen


cLiquid medium


dGaseous medium


View Answer Liquid medium

The ability of tool steel to resist softening at high temperatures is termed as __________________ hardness?


aRed


bExtended


cSuper


dExtreme


View Answer Super

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