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Mechanical Operations

Mechanical Operations
The sphericity of a cylinder of 1 mm diameter and length 3 mm is

0.78
0.6
0.9
0.5

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

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Mechanical Operations
Flow of filtrate through the cake in a plate and frame filter press is best described by the __________ equation.

Fanning's
Kremser
Kozney-Karman
Hagen-Poiseulle's

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Mechanical Operations
Limestone is normally crushed in a

Ball mill
Hammer crusher
Roll crusher
Tube mill

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

∝ √ΔP
∝ ΔP
∝ 1/ ΔP
Independent of ΔP

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Mechanical Operations
Sauter mean diameter is the same as the __________ mean diameter.

Volume-surface
Geometric
Arithmetic
Mass

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