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

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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

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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

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ckWh/sec. kg

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dkg/sec

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View Answer kW. sec/kg

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