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Mechanical Operations

Mechanical Operations
Ultra centrifuges are used for the separation of __________ solid particles.

Colloidal
Coarse
Fine
Dissolved

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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 W.Dr.ρ
3.6 V.W.Dr/ρ
3.6 V.W.Dr.ρ
3.6 V.W. ρ

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Mechanical Operations
200 mesh screen means 200 openings per

Cm²
Inch
Cm
Inch²

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

Hydrocyclones
Classifiers
Thickeners
Decanters

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Mechanical Operations
Sulphuric acid mist is arrested by using a __________ scrubber.

Venturi
Hollow wet
Packed wet
Co-current

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Mechanical Operations
Mesh indicates the number of holes per

Linear inch
Linear foot
Square foot
Square inch

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