As particle size is reduced__________________?

Byadmin February 18, 2019August 22, 2021

As particle size is reduced__________________?

A. Screening becomes progressively more difficult
B. Screening becomes progressively easier
C. Capacity and effectiveness of the screen is increased
D. None of these

Mechanical Operations

There is practically no alternative/competitor to _________________ in the beneficiation treatment of sulphide ores?

There is practically no alternative/competitor to _________________ in the beneficiation treatment of sulphide ores?

A. Classification
B. Tabling
C. Jigging
D. Froth floatation

Read More There is practically no alternative/competitor to _________________ in the beneficiation treatment of sulphide ores?
Mechanical Operations

A cottrell precipitator makes use of the ______________ for dusty air cleaning?

A cottrell precipitator makes use of the ______________ for dusty air cleaning?

A. Electric spark
B. Corona discharge
C. Alternating current
D. None of these

Read More A cottrell precipitator makes use of the ______________ for dusty air cleaning?
Mechanical Operations

A tube mill compared to a ball mill__________________?

A tube mill compared to a ball mill__________________?

A. Has a higher length/diameter ratio
B. Produces a coarser product
C. Has a higher diameter/length ratio
D. Uses much larger balls

Read More A tube mill compared to a ball mill__________________?
Mechanical Operations

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) ?

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

Read More 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) ?
Mechanical Operations

Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a ______________ conveyor?

Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a ______________ conveyor?

A. Drag
B. Ribbon
C. Screw
D. Slat

Read More Gummy & sticky materials like molasses, sugar etc. are best transported/handled by using a ______________ conveyor?
Mechanical Operations

The capacity of a classifier in ‘tons of solid/hr’ is given by (where, A = cross-sectional area in m2, V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3)_________________?

The capacity of a classifier in ‘tons of solid/hr’ is given by (where, A = cross-sectional area in m2, V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3)_________________?

A. 3.6 AVS.ρ
B. 3.6 A.V.ρ
C. 3.6 A.S. ρ
D. 3.6 AVS/ρ
Answer: Option

Read More The capacity of a classifier in ‘tons of solid/hr’ is given by (where, A = cross-sectional area in m2, V = rising velocity of fluid in m/sec, S = percentage of solids in the suspension by volume, ρ = density of solids in kg/m3)_________________?

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