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


bLow thermal conductivity


cHigh corrosion resistance


dAll A., B. and C.



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


b Separating


cBucket


dThrottling


View Answer Bomb

The main constituent of carborundum is ___________________ carbide?


aCalcium


bSilicon


cBoron


dAluminium


View Answer Silicon

Specific volume of an ideal gas is____________________?


aEqual to its density


bThe reciprocal of its density


cProportional to pressure


dNone of these



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


aHigh silicon iron (14% Si)


bTin


cStainless steel


dAll A., B. and C.


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


bTriple


cBoiling


dBoyle


View Answer Triple

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


a0.5


b2


c40


d75


View Answer 2

Which of the following has the least thermal efficiency ?


aSteam engine


bCarnot engine


cDiesel engine


dOtto engine


View Answer Steam engine

Which of the following is the softest material ?


aQuartz


bCalcite


cCorundum


dFluorite


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


bGenerators and small motors


cInduction motors


dHigh frequency transformers



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