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Mechanical Operations

Mechanical Operations
Percentage of drum submerged in the slurry in case of rotary drum filter is

85
3
25
30

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Mechanical Operations
Size reduction of asbestos and mica is done by

Hammer mills
Rod mills
Crushing rolls
Gyratory crushers

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Mechanical Operations
Use of 'grinding aids' is done in __________ grinding.

Dry
Wet
Ultrafine
Intermediate

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Mechanical Operations
In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing.

Secondary
Primary
Fine
Ultrafine

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Mechanical Operations
Fibrous material is broken by a

Squirrel-cage disintegrator
Ball mill
Rollcrusher
Tube mill

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Mechanical Operations
For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a

Hammer mill
Ball mill
Crushing rolls
Buhrstone mill

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