Which of the following is the hardest material ?
Which of the following is the hardest material ?
A. Calcite
B. Quartz
C. Corundum
D. Gypsum
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_____________ is the most commonly used ‘filter aid’?
_____________ is the most commonly used ‘filter aid’?A. Diatomaceous earth
B. Fuller’s earth
C. Vermiculite
D. Semi-plastic clayWhich of the following must be stored in silos and not in open yard ?
Which of the following must be stored in silos and not in open yard ?A. Coke breeze
B. High V.M. bituminous coal
C. Sand
D. None of theseIn a roll crusher, both the rolls_________________?
In a roll crusher, both the rolls_________________?A. Have the same diameter
B. Are rotated towards each other
C. Run either at the same or different speeds
D. All A., B. and C.A fluid energy mill is used for __________________?
A fluid energy mill is used for __________________?A. Cutting
B. Grinding
C. Ultra-grinding
D. CrushingFeed size of ≥ 25 cms can be accepted by _______________________?
Feed size of ≥ 25 cms can be accepted by _______________________?A. Ball mill
B. Rod mill
C. Fluid energy mill
D. Jaw crusherThe most common filter aid is_________________?
The most common filter aid is_________________?A. Diatomaceous earth
B. Calcium silicate
C. Sodium carbonate
D. Silica gel