_______________ is a cohesive solid ?
_______________ is a cohesive solid ?
A. Wheat
B. Sand
C. Wet clay
D. None of these
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For efficient grinding, ball mills must be operated__________________?
For efficient grinding, ball mills must be operated__________________?A. At a speed less than the critical speed
B. At a speed more than the critical speed
C. At a speed equal to the critical speed
D. With minimum possible small ballsMolten ammonium nitrate is mixed with ground limestone in fertilizer plant in a__________________?
Molten ammonium nitrate is mixed with ground limestone in fertilizer plant in a__________________?A. Pug mill
B. Mixer-extruder
C. Banbury mixer
D. Muller mixerToothed roll crushers achieve size reduction by___________________?
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._____________ mills are termed as impactors?
_____________ mills are termed as impactors?A. Hammer
B. Cage
C. Rolling-compression
D. None of theseWhich of the following mineral dressing operations is termed as ‘comminution’?
Which of the following mineral dressing operations is termed as ‘comminution’?A. Panning
B. Spiralling
C. Tabling
D. None of theseThe constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond’s law, Rittinger’s law and Kick’s law) depend upon the_________________?
The constants (Kb, Kr and Kk) used in the laws of crushing (i.e., Bond’s law, Rittinger’s law and Kick’s law) depend upon the_________________?A. Feed material
B. Type of crushing machine
C. Both A. & B.
D. Neither A. nor B.