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Mechanical Operations

Mechanical Operations
Sphericity of a cubical particle, when its equivalent diameter is taken as the height of the cube, is

0.5
√2
1
√3

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Mechanical Operations
The inlet pressure in a constant rate filtration

Decreases gradually
Increases continuously
Remains constant
None of these

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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.

500
5000
5
50

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Mechanical Operations
Vertical transportation of materials can be done by a/an

Pneumatic conveyor
Both B & C
Apron conveyor
Bucket elevator

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Mechanical Operations
Ball mill is used for

Coarse grinding
Attrition
Crushing
Fine grinding

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Mechanical Operations
The opening of a 200 mesh screen (Taylor series) is

74 mili-microns
0.0074 mm
0.0047 cm
0.0074 cm

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