Chemical Engineering MCQs

Page No. 606

Froth floatation is the most suitable for treating ____________________?


aIron ores

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bSulphide ores

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cQuartzite

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dNone of these

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View Answer Sulphide ores

Mixer used for rubber compounding is__________________?


amixer-extruder

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bBanbury internal mixer

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cMuller mixer

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dPug mill

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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)

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bcos α = (dr + df)/(dr + dp)

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ctan α = (dr + dp)/(dr + df)

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dsin α = (dr + dp)/(dr + df)

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


aSparkler filter

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bPre-coat filter

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cDisc-bowl centrifuge

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dSharpies super-centrifuge

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


a10

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b25

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c50

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d75

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View Answer 50

_______________ mill is normally used for grinding of talc?


aTube

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bCompartment

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cRing-roll

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dPebble

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View Answer Ring-roll

The most common filter aid is_________________?


aDiatomaceous earth

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bCalcium silicate

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cSodium carbonate

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dSilica gel

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View Answer Diatomaceous earth

The porosity of a compressible cake is _____________________?


aMinimum at the filter medium

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bMinimum at the upstream face

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cMaximum at the filter medium

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dSame throughout the thickness of cake

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


aComminution

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bDispersion

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cPulverisation

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dCompression

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View Answer Compression

200 mesh screen means 200 openings per_____________________?


acm2

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bcm

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cinch

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dinch2

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View Answer inch

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