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Mechanical Operations

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

0.78
0.5
0.9
0.6

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Mechanical Operations
Out of the following size reduction equipments, the maximum feed size can be accepted by the

Tube mill
Jet pulveriser
Ball mill
Jaw crusher

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Mechanical Operations
Which one is a filter aid?

None of these
Diatomaceous earth
Convas fabric
Calcined lime

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Mechanical Operations
A compressible cake has the

None of these
Maximum porosity at the upstream side
Maximum porosity at the filter medium
Same porosity throughout the cake thickness

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Mechanical Operations
Toothed roll crushers achieve size reduction by

Tearing (shear) and compression
Neither A nor B
Both A & B
Impact and attrition

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Mechanical Operations
Which of the following is not accomplished by agitation of liquids in agitators?

Suspending solid particles
Dispersing gas in liquid
Blending of immiscible liquids
Dispersing immiscible liquid in form of emulsion

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