Chemical Engineering MCQs

Page No. 105

Throttling process is a/an _____________ process?


aReversible and isothermal


bIrreversible and constant enthalpy


cReversible and constant entropy


d Reversible and constant enthalpy



(∂T/∂P)H is the mathematical expression for__________________?


aSpecific heat at constant pressure (Cp)


bSpecific heat at constant volume (Cv)


c Joule-Thompson co-efficient


dNone of these



In jet refrigerators, the refrigerating fluid is practically always_________________?


aWater


b Ammonia


cFreon


dBrine


View Answer Water

Gibbs phase rule finds application, when heat transfer occurs by___________________?


aConduction


bConvection


cRadiation


dCondensation


View Answer Condensation

Mild steel is ___________________?


aA low carbon steel (0.05 to 0.3% carbon)


bHighly resistant to corrosion (as much as stainless steel)


cA high carbon steel (0.5 to 1.5% carbon)


dVery poor in strength & ductility



In case of the decomposition of hydroiodic acid (2HI ⇌ H2 + I2), addition of H2 (at equilibrium condition) will__________________?


aIncrease the partial pressure of I2


bDecrease the partial pressure of HI


cDiminish the degree of dissociation of HI


d None of these



The ability of a material to absorb energy in the elastic range is a measure of its __________________?


aToughness


bResilience


cMalleability


dBrittleness


View Answer Resilience

______________ can replace tungsten in high speed steel ?


aChromium


bVanadium


cCobalt


dMolybdenum


View Answer Molybdenum

Which of the following is not an alloy of tin ?


aWhite-bearing metal


bPewter type metal


cSoft solder


dGerman silver


View Answer German silver

When the steel is subjected to normalising, its ______________ decreases?


aYield point


bDuctility


cUltimate tensile strength (UTS)


dNone of these


View Answer Ductility

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