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Mechanical Operations

Mechanical Operations
Stamp mills are generally used for crushing

Diamond
Iron ores
Talc
Gold ores

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Mechanical Operations
Maximum size reduction in a fluid energy mill is achieved by

Cutting
Interparticle attrition
Compression
Impact

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Mechanical Operations
For sizing of fine materials, the most suitable equipment is a

Shaking screen
Vibrating screen
Grizzly
Trommel

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Mechanical Operations
Coal is finally pulverised to 200 mesh size for burning in boilers by a

Hammer crusher
Ball mill
Roll crusher
Gyratory crusher

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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
0.5 D
D
1.5 D

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Mechanical Operations
Filter aid is used to

Act as a support base for the septum
Increase the rate of filtration
Decrease the pressure drop
Increase the porosity of the cake

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MORE MCQ ON Mechanical Operations

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