Chemical Engineering MCQs

Page No. 591

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


aElectrolyte


bSurface active agent


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

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


aSparkler


bPlate and frame


cCentrifugal


dRotary drum vacuum


View Answer Centrifugal

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


aVenturi atomiser


bGravity settling chamber


cElectro-static precipitator


dCyclone separator



The maximum slope of a belt conveyor can be_____________________?


a15°


b30°


c45°


d60°


View Answer 30°

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


aCast iron


bMinimum size


cMaximum size


dElliptical


View Answer Minimum size

A belt conveyor used for the transportation of materials can___________________?


aRun upto 1 km


bTravel at a speed upto 300 metres/minute


cHandle materials upto 5000 tons/hr


dAll A., B. and C.


View Answer All A., B. and C.

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


aPropeller agitator


bCone type agitator


cTurbine agitator


dRadial propeller agitator


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


b√(S/V)p


c(S/V)2p


d(S/V)f


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


bCams or eccentric shafts


cUnbalanced flywheels


dEither A., B. or C.


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


bm . ρ/Vp


cm . Vp/ρ


dVp/m . ρ


View Answer m/ρ . Vp

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