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Mechanical Operations

Mechanical Operations
__________ are used for the separation of coarse particles from a slurry of fine particles.

Classifiers
Hydrocyclones
Thickeners
Decanters

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Mechanical Operations
__________ mills are termed as disintegrators.

Cage
Pebble
Compartment
All of these

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Mechanical Operations
Which of the following is used for primary crushing of very hard lumpy materials?

Toothed roll crusher
Gyratory crusher
Ball mill
Tube mill

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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.D.V.ρ
3.6 W.V.ρ
3.6 D.V.ρ
3.6 W.D.V.

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Mechanical Operations
In classification, particles are said to be equal settling, if they have the same terminal velocities in the

Different fluids
Both B and C
Same fluid
Same field of force

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Mechanical Operations
Filtration should be stopped in a filter press, if the

Both A & B
Liquor stops flowing out to the discharge
Cake becomes very dense
Filtration pressure rises suddenly

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