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Mechanical Operations

Mechanical Operations
200 mesh seive size corresponds to __________ microns.

24
154
200
74

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Mechanical Operations
In screen analysis, the notation +5 mm/-10 mm means particles passing through

10 mm screen and retained on 5 mm screen
5 mm screen and retained on 10 mm screen
Neither 5 mm nor 10 mm screen
Both 5 mm and 10 mm screens

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

Coagulant
Clarifier
Gravity settler
Strains

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Mechanical Operations
In closed circuit grinding as compared to open circuit grinding, the

Specific surface of product is more
Product has lesser size uniformity
Production rate at a given limiting size is lower
Operation is economical

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Mechanical Operations
Sedimentation on commercial scale occurs in

Classifiers
Cyclones
Thickeners
Rotary drum filters

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Mechanical Operations
Which of the following must be stored in silos and not in open yard?

Sand
Coke breeze
None of these
High V.M. bituminous coal

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