Chemical Engineering MCQs

Page No. 606

Froth floatation is the most suitable for treating ____________________?


aIron ores


bSulphide ores


cQuartzite


dNone of these


View Answer Sulphide ores

Mixer used for rubber compounding is__________________?


amixer-extruder


bBanbury internal mixer


cMuller mixer


dPug mill



Half the angle of nip, (α), for a roll crusher is given by (where, dr, dp and df are diameters of crushing rolls, feed particles and rolls gap respectively) ?


acos α = (dr + dp)/(dr + df)


bcos α = (dr + df)/(dr + dp)


ctan α = (dr + dp)/(dr + df)


dsin α = (dr + dp)/(dr + df)



Which of the following can be most effectively used for clarification of lube oil and printing ink ?


aSparkler filter


bPre-coat filter


cDisc-bowl centrifuge


dSharpies super-centrifuge



For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume?


a10


b25


c50


d75


View Answer 50

_______________ mill is normally used for grinding of talc?


aTube


bCompartment


cRing-roll


dPebble


View Answer Ring-roll

The most common filter aid is_________________?


aDiatomaceous earth


bCalcium silicate


cSodium carbonate


dSilica gel


View Answer Diatomaceous earth

The porosity of a compressible cake is _____________________?


aMinimum at the filter medium


bMinimum at the upstream face


cMaximum at the filter medium


dSame throughout the thickness of cake



Which of the following terminology is not used for size reduction of materials to fine sizes or powders ?


aComminution


bDispersion


cPulverisation


dCompression


View Answer Compression

200 mesh screen means 200 openings per_____________________?


acm2


bcm


cinch


dinch2


View Answer inch

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