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Mechanical Operations

Mechanical Operations
To remove dirt from the flowing fluid, we use a

Coagulant
Gravity settler
Strains
Clarifier

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Mechanical Operations
Screen capacity is proportional to (where, S = screen aperture)

S
√S
1/S
S²

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Mechanical Operations
The energy required per unit mass to grind limestone particles of very large size to 100 μm is 12.7 kWh/ton. An estimate (using Bond's law) of the energy to grind the particles from a very large size to 50 μrn is

18 kWh/ton
9.0 kWh/ton
6.35 kWh/ton
25.4 kWh/ton

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Mechanical Operations
For transporting pasty material, one will use a/an

Screw colaveyor
Belt conveyor
Bucket elevator
Apron conveyor

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Mechanical Operations
Which of the following is not a revolving/tumbling mill used for size reduction?

Pebble mill
Compartment mill
Cage mill
Rod mill

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Mechanical Operations
Colloidal mills are used for __________ grinding.

Ultrafine
Intermediate
Coarse
Fine

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