Chemical Engineering MCQs

Page No. 87

SO3 is absorbed using H2SO4 in a____________________?


aCast iron packed tower

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bStainless steel plate tower

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cPacked steel tower lined with acid proof bricks

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dNone of these

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Nitriding of steel is done (in electric furnace) at _____________ °C?


a510

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b1720

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c2210

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d910

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View Answer 510

Brass is an alloy of____________________?


aNickel and tin

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bCopper and zinc

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cTin and lead

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dCopper, nickel and zinc

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View Answer Copper and zinc

A hardened steel essentially contains___________________?


aSorbite

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bTroostite

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cMartensite

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dNone of these

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View Answer Martensite

Silicone rubber is not resistant to the corrosive action of____________________?


aSulphuric acid (10%)

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bSulphuric acid (95%)

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cEther

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dBoth B. and C.

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View Answer Both B. and C.

The fermenter used in the production of penicillin (by deep fermentation process) is made of___________________?


aGlass

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bGlass lined steel

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cHigh silicon cast iron

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dPorcelain

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View Answer Glass lined steel

Air-refrigeration cycle________________?


aIs the most efficient of all refrigeration cycles

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bHas very low efficiency

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cRequires relatively large quantities of air to achieve a significant amount of refrigeration

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dBoth B. and C

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View Answer Both B. and C

The heat treatment process applied to cold formed steel parts is ____________________?


aNormalising

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bTempering

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cArtificial ageing

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dSolution annealing

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View Answer Solution annealing

Which of the following is not an extensive property ?


aFree energy

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bEntropy

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cRefractive index

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dNone of these

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View Answer Refractive index

Refrigerants commonly used for domestic refrigerators are_________________?


a Ethyl chloride or methyl chloride

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bFreon-12

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cPropane

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dNH3 or CO2

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