Chemical Engineering MCQs

Page No. 83

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


aDuctility


bToughness


cCreep


dResilience


View Answer Toughness

A refrigeration cycle is the same as a _____________ cycle?


aTurbine


bHeat engine


cReversed heat engine


dNone of these


View Answer Reversed heat engine

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


a1.5-2


b3.5-4.5


c7-9


d12-14


View Answer 12-14

Gibbs free energy (F) is defined as__________________?


aF = E – TS


bF = H – TS


cF = H + TS


d F = E + TS


View Answer F = H – TS

Chromel (Nichrome) is an alloy of_____________________?


aChromium and molybdenum


bNickel and chromium


cMolybdenum and nickel


dChromium and aluminium


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


b Enthalpy


c Gibbs free energy


dHelmholtz free energy


View Answer Gibbs free energy

Babbitt metal used for making bearings should have_____________________?


aHigh co-efficient of friction between journal and bearing


bAbility to retain lubricant on its surface


cLow co-efficient of friction between journal and bearing


dBoth B. & C.



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


bTemperature must be kept above – 57°C


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


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


cDo not take on a permanent set


dNone of these



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


a1


b2


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


d None of these



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