Chemical Engineering MCQs

Page No. 598

Crushing of mineral particles is accomplished in a ‘cage mill’, when one or more alloy steel bars are revolved in opposite directions. It is a type of ______________ mill?


aImpact


bRoll


cVibratory


dNone of these


View Answer Roll

A compressible cake has the_________________?


aMaximum porosity at the upstream side


bMaximum porosity at the filter medium


cSame porosity throughout the cake thickness


dNone of these



Filter medium resistance is important during the ______________ of filtration?


aEarly stages


bFinal stages


cEntire process


dNone of these


View Answer Early stages

Diatomaceous earth is a/an_________________?


aExplosive


bFilter aid


cFilter medium


dCatalyst


View Answer Filter aid

Sedimentation on commercial scale occurs in____________________?


aClassifiers


bThickeners


cRotary drum filters


dCyclones


View Answer Rotary drum filters

Filter aid is used to____________________?


aIncrease the rate of filtration


bDecrease the pressure drop


cIncrease the porosity of the cake


dAct as a support base for the septum



In a roll crusher, the specific power consumption and the production rate is affected by the_________________?


aReduction ratio


bDifferential roll speed


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

The value of ‘angle of nip’ is generally about__________________?


a16°


b32°


c52°


d64°


View Answer 32°

For classification of potable (drinking) water, we use a _______________ filter?


aGravity sand


bPlate and frame


cVacuum leaf


dRotary vacuum


View Answer Gravity sand

Trommels employ _____________ for screening of materials?


aFibrous cloth


bWoven wire screen


cPunched plate


dNone of these


View Answer Punched plate

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