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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
√3
1
√2

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Mechanical Operations
Which of the following oxides is not present in hematite iron ore?

Titanium oxide
Cobalt oxide
Calcium oxide
Manganese oxide

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Mechanical Operations
Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.

Drying
Filtering
All of these
Washing

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Mechanical Operations
Ribbon blenders are exclusively meant for

Continuous mixing
Non-flowing powder and thin pastes
Blending miscible liquids
Bath mixing

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Mechanical Operations
During agitation of liquids, power consumption during laminar flow is not proportional to the

Density of the liquid
Cube of impeller diameters
Viscosity of the liquid
Square of rotational speed

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Mechanical Operations
Equivalent diameter of a particle is the diameter of the sphere having the same

Ratio of volume to surface as the particle
Ratio of surface to volume as the actual volume
Volume as the particle
None of these

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