Chemical Engineering MCQs

Page No. 588

The reduction ratio for fine grinders is_____________?


a5-10

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b10-20

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c20-40

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dAs high as 100

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View Answer As high as 100

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


aCake becomes very dense

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bLiquor stops flowing out to the discharge

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cFiltration pressure rises suddenly

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dBoth B. & C.

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View Answer Both B. & C.

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


aConditioner

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bFrother

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cCollector

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dActivator

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View Answer Collector

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


aLess than

✓


bMuch more than

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cAt least equal to

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dSlightly more than

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View Answer Less than

Filtration rate does not depend upon the________________?


aPressure drop & area of filtering surface

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bResistance of the cake & the septum

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cProperties of the cake & the filtrate

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dNone of these

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View Answer None of these

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


a1.5

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b0.5

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c1.0

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d2.0

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View Answer 1.5

Which of the following is a batch sedimentation equipment ?


aDust catcher

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bFilter thickener

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cDry cyclone separator

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dRotary sprayer scrubber

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View Answer Filter thickener

Cyclones are used primarily for separating_________________?


aSolids

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bSolids from fluids

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cLiquids

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dSolids from solids

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View Answer Solids from fluids

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


aElectrostatic precipitator

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bCyclone separator

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cStrainer

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dNone of these

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


a2250

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b1125

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c460

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d230

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View Answer 230

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