Angle of nip of the crushing rolls does not depend upon the_______________?

Which of the following is not used as filter aid ?

A. Asbestos

B. Diatomaceous earth

C. Purified wood cellulose

D. Rice husk

Which of the following mechanical conveyors does not come under the division „carriers‟ ?

A. Belt conveyor

B. Bucket elevator

C. Screw conveyor

D. Apron conveyor

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is ______________ microns?

A. < 5

B. 10 to 25

C. < 74

D. > 1000

Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter) ?

A. 0.5 D

B. D

C. 1.5 D

D. 2 D

Which of the following grinding mills has the horizontally arranged rods as the grinding elements thereby delivering more uniform granular products with minimum fines ?

A. Compartment mill

B. Rod mill

C. Pebble mill

D. Tube mill