Chemical Engineering MCQs

A. Grinding element & the housing
B. Feed particles
C. Both a. and b.
D. Neither a. nor b.

A. Bronze
B. Stainless steel
C. Flint or porcelain
D. Concrete

A. Decreasing size of product at constant size of feed
B. Decreasing machine capacity
C. Increasing size of feed at constant reduction ratio
D. None of these

A. Tube mill
B. Ball mill
C. Jaw crusher
D. Jet pulveriser

A. 3.6 avs.ρ
B. 3.6 a.v.ρ
C. 3.6 a.s. ρ
D. 3.6 avs/ρ

A. Np ∝ nre
B. Np ∝ √nre
C. Np → constant
D. Np ∝ 1/nre

A. Flight
B. Slat or drag
C. Ribbon
D. Screw

A. Recovery/rejection
B. Recovery
C. Rejection
D. None of these

A. Crushing takes place by impact breaking
B. Maximum acceptable feed size is 30 cms
C. Reduction ratio can be varied by adjusting the distance from cage to hammers
D. All a., b. and c.

A. Pressure filter
B. Vacuum filter
C. Centrifugal filter
D. Coagulant