Chemical Engineering MCQs

Page No. 605

For a non-spherical particle, the sphericity__________________?


aIs defined as the ratio of surface area of a sphere having the same volume as the particle to the actual surface area of the particle


bHas the dimension of length


cIs always less than 1


dIs the ratio of volume of a sphere having the same surface area as the particle to the actual volume of the particle



Two particles are called to be equal settling, if they are having the same ?


aSize


bSpecific gravity


cTerminal velocities in the same fluid & in the same field of force


dNone of these



Which of the following comes in the category of primary crusher for hard and tough stone ?


aJaw crusher


bCone crusher


cGyratory crusher


dNone of these


View Answer Jaw crusher

Mesh indicates the number of holes per_________________?


aSquare inch


bLinear inch


cSquare foot


dLinear foot


View Answer Linear inch

Which of the following conveyors cannot be recommended for transportation of abrasive materials ?


aBelt conveyor


bApron conveyor


cFlight conveyor


dChain conveyor


View Answer Flight conveyor

For removal of very small amounts of precipitate from large volume of water, the most suitable filter is the ______________ filter?


aPlate & frame


bShell & leaf


cSand


dRotary vacuum


View Answer Sand

Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m3) ?


a3.6 W.D.V.ρ


b3.6 W.D.V


c3.6 W.V.ρ


d3.6 D.V.ρ


View Answer 3.6 W.D.V.ρ

Addition of filter aid to the slurry before filtration is done to _______________ of the cake?


aIncrease the porosity


bIncrease the compressibility co-efficient


cDecrease the porosity


dDecrease the compressibility co-efficient


View Answer Increase the porosity

Sulphuric acid mist is arrested by using a ____________ scrubber?


aPacked wet


bHollow wet


cVenturi


dCo-current


View Answer Venturi

Which of the following must be stored in silos and not in open yard ?


aCoke breeze


bHigh V.M. bituminous coal


cSand


dNone of these



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