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Mechanical Operations

Mechanical Operations
Fibrous material is broken by a

Tube mill
Squirrel-cage disintegrator
Ball mill
Rollcrusher

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Mechanical Operations
For Indian standard (IS) screens, the mesh number is equal to its aperture size expressed to the nearest deca-micron (0.01 mm). Aperture width of IS screen of mesh number 50 will be approximately __________ microns.

5
50
500
5000

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Mechanical Operations
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is

0.2 to 0.4
0.01 to 0.1
0.2 to 0.8
0.1 to 0.3

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Mechanical Operations
Which of the following clay mixing devices is vacuum operated for deairation of clay?

Muller-mixer
None of these
Pug mill
Banbery mixer

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Mechanical Operations
In paint industries, blending of light paste is done by using a

Masticator
None of these
Kneader
Charge can mixer

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Mechanical Operations
The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to

N¹
N²
N°
N³

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