Chemical Engineering MCQs

Page No. 239

Scale up of agitator design requires________________?


aGeometrical similarity only

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bDynamic similarity only

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cBoth geometrical and dynamic similarity

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dAll geometrical, dynamic and kinematic similarity

✓



The velocity for subsonic flow in a pipeline_______________?


aIncreases in the downstream direction

✓


bIs constant

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cDecreases in the downstream direction

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dIs independent of the area of flow

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


aVelocity is constant along a stream line

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bEnergy is constant throughout the fluid

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

✓


dNone of these

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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

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bII, III, V

✓


cI, II, V

✖


dII, IV, V

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View Answer II, III, V

Purpose of air lift pump is to____________________?


aCompress air

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bLift compressed air

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cLift water from a well by using compressed air

✓


dLift air under negative pressure

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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

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bDecrease

✓


cRemain same

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dData insufficient to predict

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View Answer Decrease

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


aMotion of water around a ship in a lake

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bMotion of river around bridge piers

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cSteadily decreasing flow through a reducing section

✓


dSteadily increasing flow through a pipe

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


aGravityInertial

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bInertial

✓


cViscous

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dNone of these

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View Answer Inertial

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


aDiameter

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bColour

✓


cAltitude

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dNone of these

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View Answer Colour

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


a1000

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b2000

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c3000

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d4000

✓


View Answer 4000

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