Chemical Engineering MCQs

Page No. 591

Additives used for promoting the flocculation of particles is a/an _____________________?


aElectrolyte

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bSurface active agent

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cBoth A. & B.

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dNeither A. nor B.

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View Answer Both A. & B.

For separation of sugar solution from settled out mud, we use a ___________________ filter?


aSparkler

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bPlate and frame

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cCentrifugal

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dRotary drum vacuum

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View Answer Centrifugal

The most efficient equipment for the removal of sub-micronic dust particles from blast furnace gas is the__________________?


aVenturi atomiser

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bGravity settling chamber

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cElectro-static precipitator

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dCyclone separator

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The maximum slope of a belt conveyor can be_____________________?


a15°

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b30°

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c45°

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d60°

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View Answer 30°

______________________ balls capable of grinding the feed in a ball mill gives the maximum efficiency ?


aCast iron

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bMinimum size

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cMaximum size

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dElliptical

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View Answer Minimum size

A belt conveyor used for the transportation of materials can___________________?


aRun upto 1 km

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bTravel at a speed upto 300 metres/minute

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cHandle materials upto 5000 tons/hr

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dAll A., B. and C.

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View Answer All A., B. and C.

Which of the following is the most suitable for handling fibrous and dense slurries ?


aPropeller agitator

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bCone type agitator

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cTurbine agitator

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dRadial propeller agitator

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View Answer Cone type agitator

According to Bond crushing law, the work required to form particle of size ‘D’ from very large feed is (where (S/V)p and (S/V)f are surface to volume ratio of the product and feed respectively) ?


a(S/V)p

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b√(S/V)p

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c(S/V)2p

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d(S/V)f

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View Answer √(S/V)p

Vibrating screens are used for handling large tonnages of materials. The vibrating motion is imparted to the screening surface by means of_____________________?


aElectromagnets

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bCams or eccentric shafts

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cUnbalanced flywheels

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dEither A., B. or C.

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View Answer Either A., B. or C.

Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles) ?


am/ρ . Vp

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bm . ρ/Vp

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cm . Vp/ρ

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dVp/m . ρ

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View Answer m/ρ . Vp

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