Chemical Engineering MCQs

Page No. 835

Leakage in a cooking gas cylinder is detected by___________________?


aRadio-isotopes

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bPouring soap solution on the surface and locating the gas bubbles

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cHalide torch

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dPungent smell of mercaptans present in the gas

✓



Which of the following is not a characteristic observed in material failure by fatigue fracture ?


aPlastic deformation of material does not occur

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bInitiation of crack from below the surface does not occur

✓


cInitiation of crack occurs on the surface of the machine part

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dPresence of both rough & smooth zone with conchoidal markings in smooth zone of the

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The bolt is subjected to _______________ when the nut is tightened by putting the washer beneath it?


aTension

✓


bShear

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cCompression

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dBending & tension

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View Answer Tension

The joint for soldering is supported by binding wire made of ____________________?


aMild steel

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bCopper

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cSoft iron

✓


dStainless steel

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View Answer Soft iron

Tesla metre per ampere (T. m/A) is the unit for the measurement of_______________?


aMagnetic susceptibility

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bMagnetic moment

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cPermeability of free space

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dFlux density

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Consider the equilibrium A(g) + B(g) = AB(g). When the partial pressure of A is 10-2 atm, the partial pressure of B is 10-3 atm and the partial pressure of AB is 1 atm, the equilibrium constant ‘K’ is____________________?


a10 atm-1

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b105 atm-1

✓


c10 (dimensionless)

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d105 (dimensionless)

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View Answer 105 atm-1

Eutectic reaction for iron-carbon system occurs at a temperature of _______________ °C ?


a723

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b959

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c1147

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d1493

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View Answer 723

Minimum thermal efficiency of a steam boiler may be around ____________________ percent ?


a25

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b45

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c65

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d20

✓


View Answer 20

Corona discharge is related to the operation of a/an_______________________?


aInduction motor

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bElectrostatic precipitator

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cFast breeder reactor

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dMagneto hydrodynamic generator (MHD)

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Silicon crystal can be converted to p-type semi-conductor by doping with__________________?


aPhosphorous

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bNitrogen

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cCarbon

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dBoron

✓


View Answer Boron

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