Chemical Engineering MCQs

Page No. 590

Screen capacity is not a function of__________________?


aIts openings size

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bScreening mechanism

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cScreening surface

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dAtmospheric humidity

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View Answer Atmospheric humidity

Limestone is normally crushed in a _____________________?


aRoll crusher

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bHammer crusher

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cBall mill

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dTube mill

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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

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bs/c

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cs . c

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d1/s . c

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View Answer c/s

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


aRate

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bPressure

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cBoth A. & B.

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dNeither A. nor B.

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View Answer Both A. & B.

Temperature of the product during ultrafine grinding_____________________?


aIncreases

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bDecreases

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cRemain constant

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dMay increase or decrease; depends on the material being ground

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View Answer Increases

To produce talcum powder, use_____________________?


aBall mill

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bHammer mill

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cJet mill

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dPin mill

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View Answer Ball mill

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


aDecreases

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bIncreases

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cIs same as for coarser grinding

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dIs 1.5 times that for coarser grinding

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View Answer Increases

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


aResults in increased capacity

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bConsumes less power

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cConsumes more power

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dBoth A. and C.

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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

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bFlight conveyor

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cScrew conveyor

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dBoth B. and C.

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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

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bBall mill, Jaw crusher, Fluid energy mill

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cFluid energy mill, Jaw crusher, Ball mill

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dFluid energy mill, Ball mill, Jaw crusher

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