Mechanical Operations What is the selectivity index, if the grade of tailings & concentrate is the same? ∞ 0.5 1 ∞ 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations With increase in drum speed, in a rotary drum filter, the filtration rate Is not affected Decreases Increases linearly Increases Is not affected Decreases Increases linearly Increases ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Specific surface area is the surface area of a unit __________ of materials. Weight Neither A nor B Either A or B Volume Weight Neither A nor B Either A or B Volume ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is √2 √3 0.5 1 √2 √3 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing). Weber Peclet Schmidt Brinkman Weber Peclet Schmidt Brinkman ANSWER DOWNLOAD EXAMIANS APP
Mechanical Operations Theoretical capacity of crushing rolls in tons/hr is given by (where, V = peripherial velocity, m/sec. W = width of rolls, m Dr = distance between rolls ρ = density of material to be crushed, kg/m³ here, V =πN.D where, N = speed of the rolls in rotation per second (rps) D = diameter of rolls, m) 3.6 V.W.Dr/ρ 3.6 W.Dr.ρ 3.6 V.W. ρ 3.6 V.W.Dr.ρ 3.6 V.W.Dr/ρ 3.6 W.Dr.ρ 3.6 V.W. ρ 3.6 V.W.Dr.ρ ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS