Chemical Engineering MCQs

Page No. 588

The reduction ratio for fine grinders is_____________?


a5-10


b10-20


c20-40


dAs high as 100


View Answer As high as 100

Filtration should be stopped in a filter press, if the_________________?


aCake becomes very dense


bLiquor stops flowing out to the discharge


cFiltration pressure rises suddenly


dBoth B. & C.


View Answer Both B. & C.

Xanthates are used in the froth floatation process as a/an _______________________?


aConditioner


bFrother


cCollector


dActivator


View Answer Collector

The operating speed of a ball mill should be ______________ the critical speed?


aLess than


bMuch more than


cAt least equal to


dSlightly more than


View Answer Less than

Filtration rate does not depend upon the________________?


aPressure drop & area of filtering surface


bResistance of the cake & the septum


cProperties of the cake & the filtrate


dNone of these


View Answer None of these

Shape factor for a cylinder whose length equals its diameter is_________________?


a1.5


b0.5


c1.0


d2.0


View Answer 1.5

Which of the following is a batch sedimentation equipment ?


aDust catcher


bFilter thickener


cDry cyclone separator


dRotary sprayer scrubber


View Answer Filter thickener

Cyclones are used primarily for separating_________________?


aSolids


bSolids from fluids


cLiquids


dSolids from solids


View Answer Solids from fluids

Traces of liquid tar fog present in coke oven gas is separated using____________________?


aElectrostatic precipitator


bCyclone separator


cStrainer


dNone of these



For a cyclone of diameter 0.2 m with a tangential velocity of 15 m/s at the wall, the separation factor is__________________?


a2250


b1125


c460


d230


View Answer 230

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