Chemical Engineering MCQs

Page No. 597

Helical screw agitator is used for________________?


aMixing highly viscous pastes


bBlending immiscible liquids


cMixing liquids at very high temperature (> 250 °C)


dNone of these



Power required to drive a ball mill with a particular ball load is proportional to (where, D = diameter of ball mill.) ?


aD


b1/D


cD2.5


d1/D2.5


View Answer D2.5

Which of the following is not a non-metalliferous mineral ?


aCalcite


bFluorspar


cQuartz


dCassiterite


View Answer Cassiterite

Fluid medium used in the classification technique of mineral beneficiation is_________________?


aAir


bWater


cEither A. or B.


dNeither A. nor B.


View Answer Either A. or B.

A widely used size reduction equipment for ______________ is Bradford breaker?


aTalc


bCoal


cIron core


dWheat


View Answer Coal

The equivalent diameter of channel of a constant non-circular cross-section of 3 cm by 6 cm will be _______________ cms?


a20


b12


c8


d2


View Answer 2

Mixing of light fine powder such as insecticides is done by____________________?


aBanbury mixer


bPug mill


cImpact wheels


dKneader


View Answer Impact wheels

Energy consumption in a crusher decreases with increase in the________________________?


aSize of the product (at constant feed size)


bCapacity of the crushing machine


cSize of feed (at constant reduction ratio)


dAll A., B. & C.


View Answer All A., B. & C.

Pick out the wrong statement ?


aGape is the greatest distance between the crushing surfaces or the jaws


bThe angle of nip (2α) is the angle between roll faces at the level where they will just take hold of a particle and draw it in the crushing zone


cCrushing efficiency is the ratio of the energy absorbed by the solid to the surfaces energy created by crushing


dReduction ratio is the ratio of the maximum size of the particles in the feed to that in the product



Filter medium resistance is that offered by the__________________?


aFilter cloth


bEmbedded particles in the septum


cFilter cloth and the embedded particle collectively


dNone of these



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