Chemical Engineering MCQs

Page No. 767

Hooke’s law_______________________?


aApplies to elastic deformation

✓


bApplies beyond limit of proportionality in stress-strain curve

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cStates that stress is inversely proportional to strain upto elastic limit

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dNone of these

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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

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cVolumetric

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dImpeller

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View Answer Mechanical

Increase in temperature, in general results in the____________________?


aDecrease in the viscosities of both liquids & gases

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bIncrease in the viscosities of both liquids & gases

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

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

✓



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


aBolt

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bStud

✓


cSet screw

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dSplit nut

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View Answer Stud

Dryness fraction of dry steam is_________________?


a0

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b∞

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c1

✓


d0.5

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View Answer 1

Specific _________________ is a dimensionless quantity ?


aHeat

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bHumidity

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cWeight

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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

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

✖


dNone of these

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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

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bTempering

✓


cCarburising

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dAnnealing

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View Answer Tempering

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


aAir

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bOxygen

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cLiquid medium

✓


dGaseous medium

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View Answer Liquid medium

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


aRed

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bExtended

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cSuper

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dExtreme

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View Answer Super

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