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Mechanical Operations

Mechanical Operations
For the preliminary breaking of hard rock, we use a

Tube mill
Ball mill
Squirrel-cage disintegrator
Gyratory crusher

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Mechanical Operations
A gravity decanter is meant for the separation of two __________ density.

Miscible liquids of same
Immiscible liquids of same
Immiscible liquids of different
Miscible liquids of different

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Mechanical Operations
The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be

Wi
3.34 Wi
0.5 Wi
1.34 Wi

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Mechanical Operations
Out of the following size reduction equipments, the maximum feed size can be accepted by the

Jaw crusher
Jet pulveriser
Tube mill
Ball mill

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Mechanical Operations
Traces of liquid tar fog present in coke oven gas is separated using

None of these
Cyclone separator
Strainer
Electrostatic precipitator

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Mechanical Operations
During size reduction by a jaw crusher, the energy consumed decreases with the

Decreasing machine capacity
None of these
Decreasing size of product at constant size of feed
Increasing size of feed at constant reduction ratio

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