Chemical Engineering MCQs

Page No. 586

Close circuit grinding by a ball mill with air sweeping employs a _______________________?


aClassifier

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bCyclone separator between mill & classifier

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cBoth A. & B.

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dNeither A. nor B.

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View Answer Both A. & B.

Which of the following mechanical conveyors does not come under the division „scrapers‟ ?


aRibbon conveyor

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bFlight conveyor

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cBucket elevators

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dDrag conveyor

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View Answer Bucket elevators

All resistances during washing of cake _____________________?


aIncreases

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bDecreases

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cRemain constant

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dNone of these

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View Answer Remain constant

Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an________________?


aAir filter

✓


bBag filter

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cVenturi scrubber

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dHydrocyclones

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View Answer Air filter

The work index in Bond’s law for crushing of solids has the following dimensions__________________?


aNo units (dimensionless)

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bkWh/ton

✓


ckW/ton

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dkWh.m1/2/ton

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View Answer kWh/ton

Which of the following minerals is not subjected to magnetic separation method ?


aRutile

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bGalena

✓


cChromite

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dSiderite

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View Answer Galena

Stamp mills are generally used for crushing__________________?


aIron ores

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bGold ores

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cTalc

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dDiamond

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View Answer Gold ores

Basic slag is not ground in_________________?


aJaw crushers

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bBall mills

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cCompartment mills

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dTube mills

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View Answer Jaw crushers

For benefication of iron ore, the most commonly used method is______________?


aFlocculation

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bFroth floatation

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cJigging & tabling

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dNone of these

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View Answer Jigging & tabling

Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is ________________ ?


a0.5

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b1

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c√2

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d√3

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View Answer 1

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