Diatomaceous earth is a/an_________________?
Diatomaceous earth is a/an_________________?
A. Explosive
B. Filter aid
C. Filter medium
D. Catalyst
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Which of the following is a vacuum filter ?
Which of the following is a vacuum filter ?A. Filter press
B. Rotary disc filter
C. Batch basket centrifuge
D. Tank filter (Nutsche filter)Fluid medium used in the classification technique of mineral beneficiation is_________________?
Fluid medium used in the classification technique of mineral beneficiation is_________________?A. Air
B. Water
C. Either A. or B.
D. Neither A. nor B.For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume?
For achieving maximum capacity of the ball mill, the ball charge should be equal to about ______________ percent of the ball mill volume?A. 10
B. 25
C. 50
D. 75In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?
In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the _____________ crushing?A. Primary
B. Secondary
C. Fine
D. UltrafineSize reduction of moulding powders, waxes, resins & gums are done in a _______________ mill?
Size reduction of moulding powders, waxes, resins & gums are done in a _______________ mill?A. Cage
B. Hammer
C. Both A. & B.
D. Neither A. nor B.Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?
Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with ______________ to get the same for dry grinding?A. 1.0
B. 0.5
C. 1.34
D. 4.34