Chemical Engineering MCQs

Page No. 197

Which of the following assumptions enables the Euler’s equation of motion to be integrated ?


aThe fluid is incompressible


bThe fluid is non-viscous


cThe continuity equation is satisfied


dThe flow is rotational and incompressible



The most convenient way of expressing solution concentration is in terms of___________________?


a Mole fraction


b Normality


cMolality


dMolarity


View Answer Molarity

What is the pipe called which lifts water from a reservoir to a greater height than the initial level in the supply reservoir ?


aPenstock


bSiphon


cTunnel


dPressure pipeline


View Answer Siphon

In turbulent flow, a rough pipe has the same friction factor as a smooth pipe____________________?


aIn the zone of complete turbulence


bWhen the roughness projections are much smaller than the thickness of the laminar film


cEverywhere in the transition zone


dWhen the friction factor is independent of the Reynold’s number



Disappearance of snow in subzero weather exemplifies the process of_________________?


aEvaporation


bSublimation


cVaporisation


dMelting


View Answer Sublimation

The vapour pressure of water is given by, in Psat = A – (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K. The vapor pressure of water in atm. at 50°C is approximately__________________?


a0.07


b0.09


c0.11


d0.13


View Answer 0.13

A fluid is pumped at the rate of 10 lb/sec to a height of 55 ft. The horse power required is _____________ hp?


a1


b10/55


c5.5


d1/55


View Answer 1

In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is__________________?


a180


b 60.3


c720


d200


View Answer 60.3

A pitched-blade turbine draws ______________ a straight blade turbine?


aLess power than


bMore power than


cSame power as


dData insufficient to predict


View Answer Less power than

Volume occupied by one gm mole of a gas at S.T.P. is ____________________?


a 22.4 litres


b22400 litres


c22.4 c.c


d359 litres


View Answer 22.4 litres

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