Chemical Engineering MCQs

Page No. 206

If a solution of eutectic composition is cooled, _______________ reaching the eutectic temperature ?


aThe solvent begins to freeze out even before


bIt will undergo no change until


c It will not solidify even on


dNone of these



Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the___________________?


aNature of the liquid


bNature of the gas


cTemperature of the liquid


dTotal pressure


View Answer Nature of the gas

The most blister form of copper is__________?


arefined copper


bimpure copper


cprocessed copper


dnone of these


View Answer impure copper

Maximum heat transfer rate can be expected in case of_________?


aLaminar flow


bCo-current flow


cTurbulent flow


dHeat flow rate is independent of nature of flow


View Answer Turbulent flow

Baffles are provided in heat exchangers to____________?


aRemove dirt


bIncrease heat transfer rate


cReduce vibrations


dReduce heat transfer rate



Pick out the wrong statement ?


aLug supports are less expensive than other type of supports


bA pipe is differentiated from a tube by the fact that a pipe has a greater wall thickness compared to the tube


cA reducer is used to change the direction of a pipe in a straight run


dThe method of fixing tubes to a tube sheet by expanding is called ‘tube rolling’



A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?


a3 kmole/hr


b4 kmole/hr


c5 kmole/hr


d6 kmole/hr


View Answer 5 kmole/hr

The molecules of a liquid which is in equilibrium with its vapor at its boiling point on an average have equal _____________ in the two phases?


aPotential energy


bIntermolecular forces


cKinetic energy


dTotal energy


View Answer Kinetic energy

Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________?


a20


b32.2


c45.35


d58.65


View Answer 58.65

At a temperature of 0°K, the molecules of a gas have only _______________ energy?


aRotational


b Vibrational


cTranslational


dNone of these


View Answer Translational

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