Chemical Engineering MCQs

Page No. 192

Venturimeters, orificemeters and nozzles are used to measure the fluid discharge from a pipeline. The average fluid velocity in a pipeline can be measured by a/an________________?


aWeir


bHot wire anemometer


cCup and vane anemometer


dNone of these


View Answer Hot wire anemometer

The fluid property which matters for falling rain drops to acquire spherical shape is its__________________?


aPressure


bHeight of descend


cViscosity


dSurface tension


View Answer Surface tension

Which of the following terms of Vander Walls equation of state for a non-ideal gas accounts for intermolecular forces ?


aRT


b P + (a/V2)


c(V – b)


d 1/RT


View Answer RT

Priming of a centrifugal pump is done to___________________?


aIncrease the mass flow rate of fluid


bDevelop effective pressure rise by the pump


cAvoid chances of separation inside the impeller


dNone of these



Pick out the wrong statement pertaining to fluid flow ?


aThe ratio of average velocity to the maximum velocity for turbulent flow of Newtonian fluid in circular pipes is 0.5


bThe Newtonian fluid velocity in a circular pipe flow is maximum at the centre of the pipe


cNavier-Stokes equation is applicable to Hagen-Poiseuille equation is applicable to the laminar flow of Newtonian fluidsthe analysis of viscous flows


dHagen-Poiseuille equation is applicable to the laminar flow of Newtonian fluids



In which of the following case of mixing of a strong acid with strong base (each of 1N concentration), temperature increase will be the highest ?


a30 c.c acid and 30 c.c base


b 20 c.c acid and 25 c.c base


c15 c.c acid and 35 c.c base


d35 c.c acid and 15 c.c base



The ratio of the wall drag to the form drag in the Stoke’s law range (for motion of spherical particles in a stationary fluid) is__________________?


a0.5


b1


c2


d0.33


View Answer 2

The discharge through a Venturimeter depends upon _________________?


aPressure drop only


bIts orientation


cCo-efficient of contraction only


dNone of these


View Answer Pressure drop only

With increase in the solute concentration, the specific heat of aqueous solutions _____________________?


aIncreases


b Decreases


c Remains unchanged


dEither A. or B.; depends on the type of solution


View Answer Decreases

The head loss due to sudden expansion is__________________?


a(V12 – V22)/2gc


b(V1 – V2)2/2gc


c(V1 – V2)/2gc


d(V12 – V22)/gc


View Answer (V1 – V2)2/2gc

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