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Mechanical Operations

Mechanical Operations
To remove dirt from the flowing fluid, we use a

Clarifier
Gravity settler
Coagulant
Strains

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Mechanical Operations
Capacity of flight conveyor in tons/hr is given by (where, W & D = width and depth of flight respectively in metre V = speed of the conveyor, metre/second ρ = bulk density of material, kg/m³)

3.6 W.V.ρ
3.6 D.V.ρ
3.6 W.D.V.
3.6 W.D.V.ρ

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Mechanical Operations
The operating speed of a ball mill should be __________ the critical speed.

Much more than
Slightly more than
Less than
At least equal to

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Mechanical Operations
Rittinger number which designates the new surface prduced per unit of mechanical energy absorbed by the material being crushed, depends on the

Ultimate strength of the material
All of these
State or manner of application of the crushing force
Elastic constant of the material

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Mechanical Operations
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is

0.2 to 0.4
0.1 to 0.3
0.2 to 0.8
0.01 to 0.1

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Mechanical Operations
Pine oil and cresylic acid are used as __________ in the froth floatation process.

Depressor
Frother
Collector
Conditioner

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