Chemical Engineering MCQs

Page No. 105

Throttling process is a/an _____________ process?


aReversible and isothermal

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bIrreversible and constant enthalpy

✓


cReversible and constant entropy

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d Reversible and constant enthalpy

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


aSpecific heat at constant pressure (Cp)

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bSpecific heat at constant volume (Cv)

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c Joule-Thompson co-efficient

✓


dNone of these

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In jet refrigerators, the refrigerating fluid is practically always_________________?


aWater

✓


b Ammonia

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cFreon

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dBrine

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View Answer Water

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


aConduction

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bConvection

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cRadiation

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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)

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cA high carbon steel (0.5 to 1.5% carbon)

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dVery poor in strength & ductility

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


aIncrease the partial pressure of I2

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bDecrease the partial pressure of HI

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cDiminish the degree of dissociation of HI

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d None of these

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


aToughness

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bResilience

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cMalleability

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dBrittleness

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View Answer Resilience

______________ can replace tungsten in high speed steel ?


aChromium

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bVanadium

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cCobalt

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dMolybdenum

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View Answer Molybdenum

Which of the following is not an alloy of tin ?


aWhite-bearing metal

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bPewter type metal

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cSoft solder

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dGerman silver

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View Answer German silver

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


aYield point

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bDuctility

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cUltimate tensile strength (UTS)

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dNone of these

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View Answer Ductility

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