Chemical Engineering MCQs

Page No. 601

Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?


aRittinger’s law

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bKick’s law

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cBond’s law

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dNone of these

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View Answer Rittinger’s law

The term ‘angle of nip’ is concerned with the operation of the ____________ crushers?


aJaw

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bRoll

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cGyratory

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dNone of these

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View Answer Roll

Which of the following parts of a jaw crusher is subjected to maximum wear and tear during its operation ?


aCheck plates

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bJaw plates

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cToggles

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dCrush shaft

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View Answer Jaw plates

The capacity of a pneumatic conveying system depends upon the ______________________?


aBulk density of materials

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bPressure of the conveying air

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cDiameter of the conveying line

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dAll A., B. and C.

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View Answer All A., B. and C.

Vertical transportation of materials can be done by a/an_______________?


aApron conveyor

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bPneumatic conveyor

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cBucket elevator

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dBoth B. & C.

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View Answer Both B. & C.

_____________ Centrifuge is normally used in sugar mills?


aTubular bowl

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bDisc-bowl

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cSuspended batch basket

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dPerforated horizontal basket continuous

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Tabular bowl centrifuges as compared to disk bowl centrifuges___________________?


aOperate at higher speed

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bEmploy bowl of larger diameter

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cCan’t be operated under pressure/vacuum

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dCan’t be used for separation of fine suspended solids from a liquid

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Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is_____________________?


a0.01 to 0.1

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b0.1 to 0.3

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c0.2 to 0.8

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d0.2 to 0.4

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View Answer 0.2 to 0.8

If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the_________________?


aLinear speed of the basket is doubled

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bLinear speed of the basket is halved

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cCentrifugal force is doubled

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dCapacity of centrifuge is increased

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Size reduction of _____________ is accomplished in steam heated rollers and roll crushers?


aResins

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bGums

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cHard rubber

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dWaxes

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View Answer Hard rubber

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