A. Attrition
B. Compression
C. Cutting
D. Impact
Related Mcqs:
- Gyratory crushers compared to the reciprocating jaw crushers__________________?
A. Have greater capacity per unit of discharge area
B. Crush intermittently
C. Are less suitable for coarse materials
D. Have less steady power consumption - As per Taggart’s formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms) ?
A. LS
B. 93 LS
C. 250 LS
D. √(LS) - Which of the following crushers can be considered as a combination of a jaw crusher and a roller crusher ?
A. Rod mill
B. Fluid energy mill
C. Gyratory crusher
D. Ball mill - Toothed roll crushers achieve size reduction by___________________?
A. Tearing (shear) and compression
B. Impact and attrition
C. Both A. & B.
D. Neither A. nor B. - Size reduction of _____________ is accomplished in steam heated rollers and roll crushers?
A. Resins
B. Gums
C. Hard rubber
D. Waxes - Reduction ratio of crushers is the___________________?
A. Ratio of feed opening to discharge opening
B. Ratio of discharge opening to feed opening
C. Determining factor for minimum dia of the feed and the product
D. None of these - During size reduction by a jaw crusher, the energy consumed decreases with the__________________?
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 - General mechanism of size reduction in intermediate and fine grinder is by __________________?
A. Cutting action
B. Compression
C. Compression and tearing
D. Impact and attrition - The mechanism of size reduction by a hammer mill is by impact and attrition between the________________?
A. Grinding element & the housing
B. Feed particles
C. Both A. and B.
D. Neither A. nor B. - The term ‘angle of nip’ is concerned with the operation of the ____________ crushers?
A. Jaw
B. Roll
C. Gyratory
D. None of these
