Chemical Engineering MCQs

Page No. 609

Which of the following is not a part of the Blake jaw crusher ?


aHanger


bCheck plates


cToggles


dPitman


View Answer Hanger

Wet grinding in a revolving mill ______________ as compared to dry grinding ?


aGives less wear on chamber walls


bRequires more energy


cIncreases capacity


dComplicates handling of the product


View Answer Increases capacity

A screen is said to be blinded, when the___________________?


aOver-sizes are present in undersize fraction


bUnder-sizes are retained in oversize fraction


cScreen is plugged with solid particles


dScreen capacity is abruptly increased



Which of the following may prove unsuitable for filtering volatile liquids ?


aPressure filter


bGravity filter


cCentrifugal filter


dVacuum filter


View Answer Vacuum filter

The most suitable equipment used to devulcanise rubber scrap and to make water dispersion & rubber solution is a __________________?


aBoundary mixer


bPropeller agitator


cSharpies centrifuge


dNone of these


View Answer Boundary mixer

To remove dirt from the flowing fluid, we use a ____________________?


aCoagulant


bGravity settler


cStrains


dClarifier


View Answer Strains

The sphericity of a solid particle of cubical shape is ___________________?


aπ


b(π/6)1/3


c(π/6)1/2


dπ/3


View Answer (π/6)1/3

In continuous filtration (at a constant pressure drop), filtrate flow rate varies inversely as the__________________?


aSquare root of the velocity


bSquare of the viscosity


cFiltration time only


dWashing time only



Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate) ?


aS


b1/R


c1/μ


dAll A., B. & C.


View Answer All A., B. & C.

Kick’s law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick’s constant is_________________?


akW. sec/kg


bkWh/kg


ckWh/sec. kg


dkg/sec


View Answer kW. sec/kg

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