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Mechanical Operations

Mechanical Operations
Feed size of ≥ 25 cms can be accepted by

Ball mill
Rod mill
Jaw crusher
Fluid energy mill

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Mechanical Operations
Work index is the gross energy (kWh/tonne of feed) necessary to reduce a very large feed to such a size that 80% of product particles will pass through a 0.1 mm screen. The value of work index determined for wet grinding should be multiplied with __________ to get the same for dry grinding.

1.34
4.34
0.5
1

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Mechanical Operations
Which of the following is a batch sedimentation equipment?

Filter thickener
Dry cyclone separator
Rotary sprayer scrubber
Dust catcher

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Mechanical Operations
Stamp mills are generally used for crushing

Diamond
Iron ores
Gold ores
Talc

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Mechanical Operations
Size reduction of asbestos and mica is done by

Gyratory crushers
Rod mills
Crushing rolls
Hammer mills

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Mechanical Operations
Trommels are revolving screens which normally operate in the range of __________ rpm.

40 - 50
60 - 75
43832
15 - 20

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