Chemical Engineering MCQs

Page No. 222

Rise of liquid in a capillary tube is due to_________________?


aCohesion

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bAdhesion

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cBoth A. & B.

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dNeither A. nor B.

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View Answer Both A. & B.

The pressure head on sudden contraction in a horizontal pipe is converted into the _____________ head?


aElevation

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bVelocity

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cBoth A. & B.

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dNeither A. nor B.

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View Answer Velocity

For very low pressure and high discharge rate, the compressor used is a/an ______________ compressor?


aAxial

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bReciprocating

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cRotary

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dNone of these

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View Answer Rotary

A bed of spherical particles (specific gravity 2.5) of uniform size 1500 μm is 0.5 m in diameter and 0.5 m high. In packed bed state, the porosity may be taken as 0.4. Ergun’s equation for the above fluid-particle system (in SI units) is given below : Δ P/L = 375 × 103 VOM + 10.94 × 106 V2 OM (SI units) If water is to be used as the fluidising medium, the minimum fluidisation velocity, VOM is_________________?


a12 mm/s

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b16 mm/s

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c24 mm/s

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d28 mm/s

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View Answer 16 mm/s

Non-colloidal solution is an example of the _______________ fluid?


aNon-Newtonian

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bNewtonian

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cDilatent

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dPseudo-plastic

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View Answer Newtonian

One dimensional flow implies________________________?


aFlow in a straight line

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bSteady uniform flow

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cUnsteady uniform flow

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dA flow which does not account for changes in transverse direction

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Out of the following flow measuring devices, which one incurs the maximum installation cost as well as pressure loss ?


aFlow nozzle

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bVenturimeter

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cRotameter

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dOrificemeter

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View Answer Venturimeter

_____________ forces do not act in case of fluid flow ?


aElastic

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bTensile

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cVibratory

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dCentrifugal

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View Answer Tensile

With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss_______________?


aDecreases

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bIncreases

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cRemain constant

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dIncreases linearly

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View Answer Remain constant

Fanning friction factor is equal to (where, fB = Blasius friction factor) ?


afB/4

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bfB/2

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c4fB

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d2fB

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View Answer fB/4

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