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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
0.5
0.9

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Mechanical Operations
In constant pressure filtration,

Resistance decreases with time
Rate of filtration is constant
Rate of filtration increases with time
Rate of filtration decreases with time

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Mechanical Operations
Which of the following is not used as filter aid?

Diatomaceous earth
Asbestos
Purified wood cellulose
Rice husk

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Mechanical Operations
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is

KW. sec/kg
KWh/kg
KWh/sec. kg
Kg/sec

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Mechanical Operations
200 mesh screen means 200 openings per

Inch
Inch²
Cm
Cm²

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Mechanical Operations
Which of the following is not used as a surface active agent in a flocculation operation?

Quartz
Sodium silicate
Lime
Alumina

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