Chemical Engineering MCQs

Page No. 586

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


aClassifier


bCyclone separator between mill & classifier


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

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


aRibbon conveyor


bFlight conveyor


cBucket elevators


dDrag conveyor


View Answer Bucket elevators

All resistances during washing of cake _____________________?


aIncreases


bDecreases


cRemain constant


dNone of these


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


cVenturi scrubber


dHydrocyclones


View Answer Air filter

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


aNo units (dimensionless)


bkWh/ton


ckW/ton


dkWh.m1/2/ton


View Answer kWh/ton

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


aRutile


bGalena


cChromite


dSiderite


View Answer Galena

Stamp mills are generally used for crushing__________________?


aIron ores


bGold ores


cTalc


dDiamond


View Answer Gold ores

Basic slag is not ground in_________________?


aJaw crushers


bBall mills


cCompartment mills


dTube mills


View Answer Jaw crushers

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


aFlocculation


bFroth floatation


cJigging & tabling


dNone of these


View Answer Jigging & tabling

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


a0.5


b1


c√2


d√3


View Answer 1

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