Chemical Engineering MCQs

Page No. 222

Rise of liquid in a capillary tube is due to_________________?


aCohesion


bAdhesion


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

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


aElevation


bVelocity


cBoth A. & B.


dNeither A. nor B.


View Answer Velocity

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


aAxial


bReciprocating


cRotary


dNone of these


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


b16 mm/s


c24 mm/s


d28 mm/s


View Answer 16 mm/s

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


aNon-Newtonian


bNewtonian


cDilatent


dPseudo-plastic


View Answer Newtonian

One dimensional flow implies________________________?


aFlow in a straight line


bSteady uniform flow


cUnsteady uniform flow


dA flow which does not account for changes in transverse direction



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


aFlow nozzle


bVenturimeter


cRotameter


dOrificemeter


View Answer Venturimeter

_____________ forces do not act in case of fluid flow ?


aElastic


bTensile


cVibratory


dCentrifugal


View Answer Tensile

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


aDecreases


bIncreases


cRemain constant


dIncreases linearly


View Answer Remain constant

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


afB/4


bfB/2


c4fB


d2fB


View Answer fB/4

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