Basic slag is not ground in_________________?
A. Jaw crushers
B. Ball mills
C. Compartment mills
D. Tube mills
Mechanical Operations
For benefication of iron ore, the most commonly used method is______________?
For benefication of iron ore, the most commonly used method is______________?
A. Flocculation
B. Froth floatation
C. Jigging & tabling
D. None of these
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is ________________ ?
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is ________________ ?
A. 0.5
B. 1
C. √2
D. √3
Gelatinous solid (which plug the septum) can be filtered by a _____________ filter?
Gelatinous solid (which plug the septum) can be filtered by a _____________ filter?
A. Sparkler
B. Plate and frame
C. Vacuum leaf
D. Pre-coat
__________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc?
__________ conveyor is the most suitable for short distance transportation of non-abrasive loose materials like garbage, grain, food wastes etc?
A. Flight
B. Screw
C. Drag
D. Belt
Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their_________________?
Sorting classifiers employing differential settling methods for separation of particles make use of the differences in their_________________?
A. Particle sizes
B. Densities
C. Terminal velocities
D. None of these
_____________ conveyors are also called scrapers?
_____________ conveyors are also called scrapers?
A. Apron
B. Screw
C. Helical flight
D. Both B. & C.
Fibrous material is broken by a__________________?
Fibrous material is broken by a__________________?
A. Roll-crusher
B. Squirrel-cage disintegrator
C. Ball mill
D. Tube mill
Work index is defined as the_________________?
Work index is defined as the_________________?
A. Gross energy (kWh/ton of feed) needed to reduce very large feed to such a size that 80% of
the product passes through a 100 micron screen
B. Energy needed to crush one tonne of feed to 200 microns
C. Energy (kWh/ton of feed) needed to crush small feed to such a size that 80% of the product
passes a 200 mesh screen
D. Energy needed to crush one ton of feed to 100 microns
Grindability of a material does not depend upon its_____________________?
Grindability of a material does not depend upon its_____________________?
A. Elasticity
B. Hardness
C. Toughness
D. Size