Chemical Engineering MCQs

Page No. 239

Scale up of agitator design requires________________?


aGeometrical similarity only


bDynamic similarity only


cBoth geometrical and dynamic similarity


dAll geometrical, dynamic and kinematic similarity



The velocity for subsonic flow in a pipeline_______________?


aIncreases in the downstream direction


bIs constant


cDecreases in the downstream direction


dIs independent of the area of flow



For steady ideal fluid flow, the Bernoulli’s equation states that the_________________?


aVelocity is constant along a stream line


bEnergy is constant throughout the fluid


cEnergy is constant along a stream line, but may vary across stream lines


dNone of these



Which of the following must be followed by the flow of a fluid (real or ideal)? (I) Newton’s law of viscosity. (II) Newton’s second law of motion. (III) The continuity equation. (IV) Velocity of boundary layer must be zero relative to boundary. (V) Fluid cannot penetrate a boundary?


aI, II, III


bII, III, V


cI, II, V


dII, IV, V


View Answer II, III, V

Purpose of air lift pump is to____________________?


aCompress air


bLift compressed air


cLift water from a well by using compressed air


dLift air under negative pressure



A centrifugal pump used to pump water is used to pump an oil with specific gravity of 0.8 at the same rate. The power consumption will now_________________?


aIncrease


bDecrease


cRemain same


dData insufficient to predict


View Answer Decrease

Select the correct practical example of steady non-uniform flow?


aMotion of water around a ship in a lake


bMotion of river around bridge piers


cSteadily decreasing flow through a reducing section


dSteadily increasing flow through a pipe



Pressure co-efficient is the ratio of pressure forces to __________________________ forces?


aGravityInertial


bInertial


cViscous


dNone of these


View Answer Inertial

Identification of pipelines carrying different liquids and gases is done by the ____________ of the pipe?


aDiameter


bColour


cAltitude


dNone of these


View Answer Colour

The maximum delivery pressure of a reciprocating compressor may be about ______________ kg/cm2?


a1000


b2000


c3000


d4000


View Answer 4000

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