Diatomaceous earth is a/an_________________?
Diatomaceous earth is a/an_________________?
A. Explosive
B. Filter aid
C. Filter medium
D. Catalyst
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______________ mean diameter of particles is given by Σ (xi/Dpi ⃗)?
______________ mean diameter of particles is given by Σ (xi/Dpi ⃗)?A. Mass
B. Volume
C. Arithmetic
D. Volume surfaceWashability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the____________________?
Washability curve based on float and sink test enables an assessment to be made of the possibility of cleaning a coal fraction based on the____________________?A. Density separation
B. Differential wettability
C. Size
D. Volatile matter contentThe 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.Equivalent diameter of a particle is the diameter of the sphere having the same __________________?
Equivalent diameter of a particle is the diameter of the sphere having the same __________________?A. Ratio of surface to volume as the actual volume
B. Ratio of volume to surface as the particle
C. Volume as the particle
D. None of theseMass flow of granular solid (M) through a circular opening of dia, D follows_____________________?
Mass flow of granular solid (M) through a circular opening of dia, D follows_____________________?A. M ∝ √D
B. M ∝ D2
C. M ∝ D3
D. M ∝ DOptimum ratio of operating speed to critical speed of a trommel is_____________________?
Optimum ratio of operating speed to critical speed of a trommel is_____________________?A. 0.33-0.45
B. 1.33-1.45
C. 0.5-2
D. 1.5-2.5