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Mechanical Operations

Mechanical Operations
Run of mine (ROM) coal is crushed by a __________ for use in domestic ovens.

Tube mill
Ball mill
Jaw crusher
Hammer crusher

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Mechanical Operations
Mixing of plastic solids is generally facilitated by

Kneading
Mastication
None of these
Dispersion

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Mechanical Operations
The grinding in a hammer crusher takes place due to the

Both A & B
Neither A nor B
Impact
Attrition

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Mechanical Operations
For spheres, the specific surface shape factor is given by

D/V
A/V
√(AD/V)
AD/V

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Mechanical Operations
Crushing efficiency of a machine ranges between __________ percent.

50 to 70
20 to 25
0.1 to 2
5 to 10

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Mechanical Operations
Filter medium resistance is that offered by the

Filter cloth and the embedded particle collectively
None of these
Filter cloth
Embedded particles in the septum

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