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Mechanical Operations

Mechanical Operations
Which of the following oxides is not present in hematite iron ore?

Calcium oxide
Cobalt oxide
Titanium oxide
Manganese oxide

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Mechanical Operations
Capacity (in tons/hr) of jaw/gyratory crusher is equal to (where, L = length of the receiving opening, cm S = greater width of the discharge opening, cm)

L.S
0.01 L.S
0.087 L.S
L.S/0.087

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Mechanical Operations
Crushing efficiency of a machine ranges between __________ percent.

50 to 70
20 to 25
5 to 10
0.1 to 2

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Mechanical Operations
In a size reduction crushing operation, feed size is 300 to 1500 mm while the product size is 100 to 300 mm. This is a case of the __________ crushing.

Ultrafine
Primary
Fine
Secondary

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Mechanical Operations
Gold ore concentration is mostly done using

Elutriation
Tabling
Jigging
Froth floatation

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Mechanical Operations
Jigging is a technique by which different particles can be

Separated by particle shape
Mixed
Separated by particle size
Separated by particle density

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