Chemical Engineering MCQs

Page No. 202

Addition of a non-volatile solute to a pure solvent ____________________?


aIncreases its freezing point


b Increases its boiling point


cDecreases its freezing point


dBoth B. and C.


View Answer Both B. and C.

The temperature in isentropic flow_______________?


aDoes not depend on Mach number


bDepends on Mach number only


cCannot drop and then increase again downstream


dNone of these



If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?


aBubble point


bSaturation temperature


cDew point


dBoth B. and C.


View Answer Both B. and C.

Pipes having diameter 14 inches or more are designated by their_________________?


aOutside diameter


bInside diameter


cSchedule number


dNone of these


View Answer Outside diameter

Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?


aPvB


bxB.PvB


c(Patm – Pvw)xB


dxB.Patm


View Answer xB.PvB

Speed of sound in an ideal gas depends on its________________?


aTemperature


bPressure


cSpecific volume


dNone of these


View Answer Temperature

1 torr is equal to ______________ mm Hg column?


a1


b0.1


c10


d1000


View Answer 1

For a given Reynold number as d/D for an orifice increases, Cd will (where, d & D are orifice & pipe diameters respectively)?


aIncrease


bDecrease


cRemain constant


dEither A. or B.; depends on other factors


View Answer Increase

The quantity of heat required to evaporate 1 kg of a saturated liquid is called __________________?


aSpecific heat


b1 Kcal


cSensible heat


dLatent heat


View Answer Latent heat

Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules ____________________?


aDo not lose energy on collision


bAre above the inversion temperature


cDo not exert attractive force on each other


dDo work equal to loss in kinetic energy



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