Fluid energy mill comes in the category of________________?
Fluid energy mill comes in the category of________________?
A. Grinder
B. Crusher
C. Cutter
D. Ultrafine grinder
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Ball mill is used for__________________?
Ball mill is used for__________________?A. Crushing
B. Coarse grinding
C. Fine grinding
D. AttritionThe porosity of a compressible cake is _____________________?
The porosity of a compressible cake is _____________________?A. Minimum at the filter medium
B. Minimum at the upstream face
C. Maximum at the filter medium
D. Same throughout the thickness of cakeThe optimum moisture content in solids to be crushed/ground ranges from _______________ percent?
The optimum moisture content in solids to be crushed/ground ranges from _______________ percent?A. 3 to 4
B. 8 to 10
C. 10 to 15
D. 15 to 20Filtration rate does not depend upon the________________?
Filtration rate does not depend upon the________________?A. Pressure drop & area of filtering surface
B. Resistance of the cake & the septum
C. Properties of the cake & the filtrate
D. None of theseWhich of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?
Which of the following gives the work required for size reduction of coal to -200 mesh in a ball mill most accurately?A. Rittinger’s law
B. Kick’s law
C. Bond’s law
D. None of theseTheoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) ?
Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripheral velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m3 here, V =πND where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) ?A. 3.6 V.W.Dr.ρ
B. 3.6 V.W. ρ
C. 3.6 W.Dr.ρ
D. 3.6 V.W.Dr/ρ