Chemical Engineering MCQs

Page No. 83

Ability of a material to absorb energy in deformation in the plastic range is characterised as its____________________?


aDuctility

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bToughness

✓


cCreep

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dResilience

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View Answer Toughness

A refrigeration cycle is the same as a _____________ cycle?


aTurbine

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bHeat engine

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cReversed heat engine

✓


dNone of these

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View Answer Reversed heat engine

Austenitic manganese steel used for making jaws of crushing machines contains about ______________ percent manganese?


a1.5-2

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b3.5-4.5

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c7-9

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d12-14

✓


View Answer 12-14

Gibbs free energy (F) is defined as__________________?


aF = E – TS

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bF = H – TS

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cF = H + TS

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d F = E + TS

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View Answer F = H – TS

Chromel (Nichrome) is an alloy of_____________________?


aChromium and molybdenum

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bNickel and chromium

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cMolybdenum and nickel

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dChromium and aluminium

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View Answer Nickel and chromium

The change in __________ is equal to the reversible work for compression in steady state flow process under isothermal condition?


aInternal energy

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b Enthalpy

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c Gibbs free energy

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dHelmholtz free energy

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View Answer Gibbs free energy

Babbitt metal used for making bearings should have_____________________?


aHigh co-efficient of friction between journal and bearing

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bAbility to retain lubricant on its surface

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cLow co-efficient of friction between journal and bearing

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dBoth B. & C.

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Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?


aPressure must be kept below 5.2 atm

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bTemperature must be kept above – 57°C

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cPressure must be kept below 5.2 atm. and temperature must be kept above 57°C

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dPressure and temperature must be kept below 5.2 atm. and – 57°C respectively

✓



Thermosetting resins are those polymers, which__________________?


aDo not increase in plasticity with rise in temperature

✓


bAllow slip to occur between molecules

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cDo not take on a permanent set

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dNone of these

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The compressibility factor for an ideal gas is 1. Its value for any other real gas is_______________?


a1

✓


b2

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cEither B. or C, depends on the nature of the gas

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d None of these

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