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Mechanical Operations

Mechanical Operations
Mixing of plastic solids is generally facilitated by

Kneading
Mastication
None of these
Dispersion

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Mechanical Operations
In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.

Middling
Tailing
None of these
Concentrate

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Mechanical Operations
__________ mill is normally used for grinding of talc.

Ring-roll
Pebble
Tube
Compartment

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Mechanical Operations
Ore concentration by jigging is based on the difference in the __________ of the particles.

None of these
Specific gravities
Shape
Wettability

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Mechanical Operations
__________ centrifuge is the most suitable for separation of non-friable crystals.

Disc-bowl
Tubular bowl
Perforated horizontal basket continuous
Suspended batch basket

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

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

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