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Mechanical Operations

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

None of these
Specific gravities
Wettability
Shape

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Mechanical Operations
The optimum moisture content in solids to be crushed/ground ranges from __________ percent.

3 to 4
8 to 10
10 to 15
15 to 20

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Mechanical Operations
The most suitable filter for the removal of very small amount of precipitate from very large volumes of water is the __________ filter.

Vacuum
Rotary
Sand
Plate & frame

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Mechanical Operations
If radius of a batch basket centrifuge is halved & the r.p.m. is doubled, then the

Linear speed of the basket is halved
Linear speed of the basket is doubled
Centrifugal force is doubled
Capacity of centrifuge is increased

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

Dry cyclone separator
Rotary sprayer scrubber
Filter thickener
Dust catcher

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Mechanical Operations
Pine oil used in froth floatation technique acts as a/an

Modifier
Frother
Activator
Collector

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