A. Calcite
B. Quartz
C. Corundum
D. Gypsum
Related Mcqs:
- Rittinger’s number designates the new surface created per unit mechanical energy absorbed by the material being crushed. Larger value of Rittinger’s number of a material indicates its________________?
A. Easier grindability
B. Poor grindability
C. High power consumption in grinding
D. None of these - Mechanical conveyors which push the material along an endless trough or tube are called scrappers. Which of the following conveying equipments comes under the category of „scrappers‟ ?
A. Bucket conveyor
B. Flight conveyor
C. Screw conveyor
D. Both B. and C. - Which of the following is the softest material ?
A. Talc
B. Feldspar
C. Corundum
D. Calcite - For transporting pasty material, one will use a/an__________________?
A. Apron conveyor
B. Belt conveyor
C. Screw conveyor
D. Bucket elevator - Rittinger number which designates the new surface produced per unit of mechanical energy absorbed by the material being crushed, depends on the ______________________?
A. State or manner of application of the crushing force
B. Ultimate strength of the material
C. Elastic constant of the material
D. All A., B. and C. - The crushed material received for separation is called feed or_________________?
A. Tailing
B. Heading
C. Concentrate
D. Middling - Width and speed of a conveyor belt depends upon the ______________ of the material?
A. Lump size
B. Bulk density
C. Both A. & B.
D. Neither A. nor B. - Grinding characteristic of a material is given by its___________________?
A. HGI
B. Angle of repose
C. Shatter index
D. Abrasion index - The material is crushed in a gyratory crusher by the action of__________________?
A. Impact
B. Compression
C. Attrition
D. Cutting - In a mixer, the quantity, (v. L/D) is termed as __________ number (where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing) ?
A. Weber
B. Peclet
C. Brinkman
D. Schmidt
