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Mechanical Operations

Mechanical Operations
Which of the following minerals is not subjected to magnetic separation method?

Galena
Chromite
Rutile
Siderite

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Mechanical Operations
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

At the end of filtration
When half the filtrate has been obtained
At time zero
At the end of filtration, but decreases with time subsequently

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Mechanical Operations
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)

2 D
1.5 D
D
0.5 D

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Mechanical Operations
In case of a hammer crusher, the final product size depends on the

All of these
Feed rate
Rotor speed
Clearance between hammer & grinding plates

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Mechanical Operations
A fluid energy mill is used for

Ultra grinding
Crushing
Cutting
Grinding

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Mechanical Operations
Maximum size reduction in a ball mill is done by the, __________ action.

Cutting
Impact
Compression
Attrition

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