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Mechanical Operations

Mechanical Operations
The opening of a 200 mesh screen (Taylor series) is

0.0047 cm
74 mili-microns
0.0074 cm
0.0074 mm

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Mechanical Operations
Energy consumption in a crusher decreases with increase in the

Size of feed (at constant reduction ratio)
All of these
Size of the product (at constant feed size)
Capacity of the crushing machine

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Mechanical Operations
In froth floatation, chemical agent added to cause air adherence is called

Collector
Modifier
Activator
Frother

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Mechanical Operations
A compressible cake has the

None of these
Maximum porosity at the upstream side
Same porosity throughout the cake thickness
Maximum porosity at the filter medium

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Mechanical Operations
For transporting pasty material, one will use a/an

Bucket elevator
Belt conveyor
Screw colaveyor
Apron conveyor

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Mechanical Operations
The study on washability of coal is done by using the __________ technique.

Elutriation
Tabling
None of these
Heavy media separation

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