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Mechanical Operations

Mechanical Operations
Which of the following comes in the category of primary crusher for hard and tough stone?

Gyratory crusher
Cone crusher
None of these
Jaw crusher

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Mechanical Operations
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the

Separation of isotopes based on their density or molecular weights difference
Concentration of rubber latex
Separation of cream from milk
Dewaxing of lubricating oil

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Mechanical Operations
The reduction ratio for fine grinders is

43961
As high as 100
44124
20-40

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Mechanical Operations
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is

KWh/sec. kg
Kg/sec
KWh/kg
KW. sec/kg

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Mechanical Operations
Fluid medium used in the classification technique of mineral beneficiation is

Water
Air
Neither A nor B
Both A & B

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Mechanical Operations
To get a fine talc powder from its granules, the equipment used is

Gyratory crusher
Roller crusher
Ball mill
Jaw crusher

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