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Mechanical Operations

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

Coagulant
Gravity settler
Strains
Clarifier

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Mechanical Operations
The specific cake resistance for incompressible sludges is (where ΔP = pressure drop over cake)

Independent of ΔP
∝ 1/ ΔP
∝ √ΔP
∝ ΔP

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Mechanical Operations
The unit of filter medium resistance is

Gm⁻¹
Cm⁻¹
Cm/gm⁻¹
Gm/cm⁻¹

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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. ρ
3.6 V.W.Dr.ρ

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Mechanical Operations
The filter medium resistance is controlled by

Flow rate alone
Pressure drop alone
Both pressure drop and flow rate
Cake thickness

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Mechanical Operations
For transporting pasty material, one will use a/an

Screw colaveyor
Belt conveyor
Apron conveyor
Bucket elevator

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MORE MCQ ON Mechanical Operations

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