Chemical Engineering MCQs

Page No. 207

On mixing 56 gm of CaO with 63 gm of HNO3, the amount of Ca(NO3)2 formed is ______________ gm?


a82


b164


c41


d8.2


View Answer 82

Atmospheric pressure corresponds to a hydrostatic head of_________________?


a13.6 cms of Hg


b34 ft ofH2O


c1 metre of H2O


d13.6 metres of Hg


View Answer 34 ft ofH2O

A pipe of I.D. 4 m is bifurcated into two pipes of I.D. 2 m each. If the average velocity of water flowing through the main pipe is 5 m/sec, the average velocity through the bifurcated pipes is__________________?


a20 m/sec


b10 m/sec


c5 √2 m/sec


d5 m/sec


View Answer 10 m/sec

Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?


aCd = Cc/Cv


bCd = Cc.Cv


cCd = Cv/ Cc


dNone of these


View Answer Cd = Cc.Cv

A fluid whose apparent viscosity increases with shear rate is termed as the _____________ fluid?


aNewtonian


bViscous


cDilatant


dNon-viscous


View Answer Dilatant

In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the _____________ efficiency?


aManometric


bMechanical


cVolumetric


dOverall


View Answer Manometric

Very small pressure difference (< 5 mm water column) can be most conveniently measured by a/an _____________ manometer?


aU-tube water


bU-tube mercury


cInclined tube mercury


dInclined tube water


View Answer Inclined tube water

The flow of a liquid through tapering pipe at a constant rate is an example of _______________ flow?


aSteady uniform


bSteady non uniform


cUnsteady uniform


dUnsteady non uniform


View Answer Steady non uniform

The rate of shear versus the shear stress curves are time dependent for _____________ fluid?


aThixotropic


bRheopectic


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

As the velocity V and thus the Reynolds number of a flow past a sphere increases from very low value, the drag force for Re << 1 ?


aIncreases linearly with V


bDecreases linearly with V


cDecreases as V2


dNone of these



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