Chemical Engineering MCQs

Page No. 122

Brass tubes are used in the manufacture of tubes of evaporators used in sugar and salt industries, mainly because of its ______________________?


aHigh co-efficient of thermal expansion

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bLow thermal conductivity

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cHigh corrosion resistance

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dAll A., B. and C.

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Dryness fraction of wet steam is defined as the ratio of mass of vapour in the mixture to the mass of mixture ______________ calorimeter is not used for measuring the dryness fraction of steam?


aBomb

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b Separating

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cBucket

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dThrottling

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View Answer Bomb

The main constituent of carborundum is ___________________ carbide?


aCalcium

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bSilicon

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cBoron

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dAluminium

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View Answer Silicon

Specific volume of an ideal gas is____________________?


aEqual to its density

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bThe reciprocal of its density

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cProportional to pressure

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dNone of these

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Carbon tetrachloride can be stored in a storage vessel made of________________?


aHigh silicon iron (14% Si)

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bTin

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cStainless steel

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dAll A., B. and C.

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View Answer All A., B. and C.

The point at which all the three (solid, liquid and gas) phases co-exist, is known as the ____________ point?


aFreezing

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bTriple

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cBoiling

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dBoyle

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View Answer Triple

Approximate value of the modulus of elasticity for steel is about _____________ × 106kg/cm2?


a0.5

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b2

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c40

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d75

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View Answer 2

Which of the following has the least thermal efficiency ?


aSteam engine

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bCarnot engine

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cDiesel engine

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dOtto engine

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View Answer Steam engine

Which of the following is the softest material ?


aQuartz

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bCalcite

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cCorundum

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dFluorite

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View Answer Calcite

Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?


aArmature of small motors/generators

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bGenerators and small motors

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cInduction motors

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dHigh frequency transformers

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