Chemical Engineering MCQs

6108 MCQs  (Page 235 of 611)

In case of a revolving mill, wet grinding compared to dry grinding__________________?
A. Requires more energy
B. Has less capacity
C. Complicates handling & classification of the product
D. None of these
Rittinger’s crushing law states that_____________________?
A. Work required to form a particle of any size is proportional to the square of the surface to
VolUme ratio of the product
B. Work required to form a particle of a particular size is proportional to the square root of the
SurFace to volume ratio of the product
Paddle agitator_________________?
A. Is suitable for mixing low viscosity liquids
B. Produces axial flow
C. Moves at very high speed
D. None of these
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration___________________?
A. At time zero
B. At the end of filtration
C. When half the filtrate has been obtained
D. At the end of filtration, but decreases with time subsequently
Ball mill is used for__________________?
A. Crushing
B. Coarse grinding
C. Fine grinding
D. Attrition
Which is a secondary crusher for a hard & tough stone ?
A. Jaw crusher
B. Cone crusher
C. Impact crusher
D. Toothed roll crusher