Chemical Engineering MCQs

Page No. 590

Screen capacity is not a function of__________________?


aIts openings size


bScreening mechanism


cScreening surface


dAtmospheric humidity


View Answer Atmospheric humidity

Limestone is normally crushed in a _____________________?


aRoll crusher


bHammer crusher


cBall mill


dTube mill


View Answer Hammer crusher

The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size)?


ac/s


bs/c


cs . c


d1/s . c


View Answer c/s

The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant ______________ filtration?


aRate


bPressure


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Temperature of the product during ultrafine grinding_____________________?


aIncreases


bDecreases


cRemain constant


dMay increase or decrease; depends on the material being ground


View Answer Increases

To produce talcum powder, use_____________________?


aBall mill


bHammer mill


cJet mill


dPin mill


View Answer Ball mill

As the product becomes finer, the energy required for grinding___________________?


aDecreases


bIncreases


cIs same as for coarser grinding


dIs 1.5 times that for coarser grinding


View Answer Increases

Choke crushing (in case of a Jaw crusher) compared to free crushing__________________?


aResults in increased capacity


bConsumes less power


cConsumes more power


dBoth A. and C.


View Answer Consumes more power

Mechanical conveyors which push the material along an endless trough or tube are called scrappers. Which of the following conveying equipments comes under the category of „scrappers‟ ?


aBucket conveyor


bFlight conveyor


cScrew conveyor


dBoth B. and C.


View Answer Both B. and C.

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them ?


aJaw crusher, Ball mill, Fluid energy mill


bBall mill, Jaw crusher, Fluid energy mill


cFluid energy mill, Jaw crusher, Ball mill


dFluid energy mill, Ball mill, Jaw crusher



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