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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

√2
1
0.5
√3

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Mechanical Operations
Which of the following is not an industrial screening equipment?

Trommel
Grizzly
Sharpies centrifuge
Vibrating screen

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Mechanical Operations
Wheat is ground into flour in a

Fluid energy mill
Roller crusher
Hammer crusher
Impact mill

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Mechanical Operations
The resistance offered by the filter used in a bag filter is proportional to (where, c = dust concentration, and s = particle size )

S . c
1/s . c
S/c
C/s

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Mechanical Operations
Gravity settling process is not involved in the working of a

Sedimentation tank
Classifier
Hydrocyclone
Dorr-thickener

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Mechanical Operations
Helical screw agitator is used for

Mixing highly viscous pastes
Blending immiscible liquids
None of these
Mixing liquids at very high temperature (> 250 °C)

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