Chemical Engineering MCQs

Page No. 607

Power consumption during turbulent flow in agitation tank is proportional to the ______________ of the liquid?


aViscosity


bThermal conductivity


cSurface tension


dDensity


View Answer Density

A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is_____________?


a0.1


b0.4


c0.6


dNone of these


View Answer 0.6

Screw conveyors are________________?


aRun at very high rpm


bSuitable for sticky materials


cSuitable for highly abrasive materials


dAll A., B. and C.



Gold ore concentration is mostly done using___________________?


aJigging


bTabling


cFroth floatation


dElutriation


View Answer Tabling

Energy requirement (per unit mass of material crushed/ground) is highest for__________________?


aJaw crusher


bRod mill


cBall mill


dFluid energy mill


View Answer Fluid energy mill

Pine oil and Cresylic acid are used as ______________ in the froth floatation process?


aFrother


bCollector


cDepressor


dConditioner


View Answer Frother

The ratio of the average load to the installed capacity of the plant whose reserve capacity is zero will be equal to__________________?


aload factor


b plant factor


cutilisation factor


dboth (A) and (B)


View Answer both (A) and (B)

In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is__________________?


a4


b1/4


c1


d1/2


View Answer 1/4

For raschig rings, the sphericity is_____________________?


a0.5


b1


c< 1


d√3


View Answer < 1

Which of the following relationships between co-efficient of friction (μ) between rock & roll and a (half of the angle of nip) of the particle to be crushed is correct ?


aμ > tan α


bμ ≥ tan α


cμ > tan 2α


dμ ≤ tan α


View Answer μ ≥ tan α

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