Chemical Engineering MCQs

Page No. 121

Presence of even 0.005% of _____________ in copper makes it highly brittle, rendering it useless for wire-drawing?


aOxygen


bArsenic


cAntimony


dBismuth


View Answer Bismuth

_____________ is added in low carbon steel to raise its yield point?


aSulphur


bPhosphorous


cSilicon


dManganese


View Answer Manganese

Age hardening is concerned with_________________?


aCopper


bBrass


cDuralumin


dSilver


View Answer Duralumin

Thermosetting polymers are_________________?


aInjection moulded


bCast molded


cExtruded


dNone of these


View Answer Cast molded

A material is called ‘ductile’, if it can be__________________?


aDrawn into wires


bHammered to a thin sheet


cFractured without deformation


dMade lustrous by heating it


View Answer Drawn into wires

At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) ?


aμ° + RT ln f


bμ°+ R ln f


c μ° + T ln f


dμ° + R/T ln f


View Answer μ° + RT ln f

A material capable of undergoing large permanent deformation, when subjected to tension is termed as___________________?


aFriable


bDuctile


cBrittle


dNone of these


View Answer Ductile

Charles’ law for gases states that__________________?


aV/T = Constant


bV ∝ 1/T


c V ∝ 1/P


dPV/T = Constant


View Answer V/T = Constant

Corrosion involves exchange of electrons in ____________ corrosion?


aChemical


bElectrochemical


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

The co-efficient of performance (COP) of a refrigerating system, which is its index of performance, is defined as the ratio of useful refrigeration to the net work. The units of _____________ and COP are the same?


aKinematic viscosity


bWork


cTemperature


dNone of these


View Answer None of these

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