A. Separation efficiency
B. Selectivity index
C. Concentration ratio
D. None of these
Related Mcqs:
- Sauter mean diameter is the same as the ______________ mean diameter?
A. Mass
B. Arithmetic
C. Volume-surface
D. Geometric - Which of the following minerals is not subjected to magnetic separation method ?
A. Rutile
B. Galena
C. Chromite
D. Siderite - Which of the following equations is Rittinger’s crushing law? (Where P = power required by the machine, m = feed rate, k = a constant, D̅ sa & D̅ sb = volume surface mean diameter of feed & product respectively) ?
A. P/m = K/ √Dp
B. P/m = K . ln D̅ sa/D̅ sb
C. P/m = K . (1/ D̅ sb – 1/D̅ sa)
D. None of these - ______________ mean diameter of particles is given by Σ (xi/Dpi ⃗)?
A. Mass
B. Volume
C. Arithmetic
D. Volume surface - The reduction ratio for grinders is defined as (where, Df and Dp are average diameters of feed and product respectively) ?
A. Df/Dp
B. Dp/Df
C. Df – Dp
D. None of these - If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is φs is defined by________________?
A. φs = 6 Vp/dpsp
B. φs = Vp/dpsp
C. φs = 6 dpSp/Vp
D. φs = dpSp/Vp - 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 - Size reduction of ice and gypsum can be accomplished suitably by a _______________ crusher?
A. Blake jaw
B. Toothed roll
C. Gyratory
D. None of these - In a grinding operation, the limiting particle size is the size of the _______________ particle in the sample?
A. Smallest
B. Largest
C. Either A. or B.
D. Neither A. nor B. - _______________ mill is normally used for grinding of talc?
A. Tube
B. Compartment
C. Ring-roll
D. Pebble
