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Mechanical Operations

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

Wettability
None of these
Shape
Specific gravities

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Mechanical Operations
What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls?

2.76
1
0.66
0.5

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Mechanical Operations
The filter medium resistance is controlled by

Both pressure drop and flow rate
Cake thickness
Pressure drop alone
Flow rate alone

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Mechanical Operations
Cement clinker is reduced to fine size by a

Hammer mill
Ball mill
Tube mill
Roll crusher

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Mechanical Operations
Tabling process used for separating two materials of different densities by passing the dilute pulp over a table/deck, which is inclined from the horizontal surface at an angle of about

1 to 2°
5 to 10°
2 to 5°
10 to 15°

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Mechanical Operations
Sulphuric acid mist is arrested by using a __________ scrubber.

Hollow wet
Packed wet
Co-current
Venturi

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