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

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bArsenic

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cAntimony

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dBismuth

✓


View Answer Bismuth

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


aSulphur

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bPhosphorous

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cSilicon

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dManganese

✓


View Answer Manganese

Age hardening is concerned with_________________?


aCopper

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bBrass

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cDuralumin

✓


dSilver

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View Answer Duralumin

Thermosetting polymers are_________________?


aInjection moulded

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bCast molded

✓


cExtruded

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dNone of these

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View Answer Cast molded

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


aDrawn into wires

✓


bHammered to a thin sheet

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cFractured without deformation

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dMade lustrous by heating it

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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

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bμ°+ R ln f

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c μ° + T ln f

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dμ° + R/T ln f

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View Answer μ° + RT ln f

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


aFriable

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bDuctile

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cBrittle

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dNone of these

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View Answer Ductile

Charles’ law for gases states that__________________?


aV/T = Constant

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bV ∝ 1/T

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c V ∝ 1/P

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dPV/T = Constant

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View Answer V/T = Constant

Corrosion involves exchange of electrons in ____________ corrosion?


aChemical

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bElectrochemical

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cBoth A. & B.

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dNeither A. nor B.

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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

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bWork

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cTemperature

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dNone of these

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View Answer None of these

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