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Mechanical Operations

Mechanical Operations
Ultrafine grinders operate principally by

Impact
Cutting action
Attrition
Slow compression

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

Jet pulveriser
Jaw crusher
Ball mill
Tube mill

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Mechanical Operations
As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms )

LS
√LS
250 LS
93 LS

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Mechanical Operations
Limestone is normally crushed in a

Ball mill
Tube mill
Hammer crusher
Roll crusher

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

0.0047 cm
0.0074 cm
74 mili-microns
0.0074 mm

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

Ball mill
Hammer crusher
Tube mill
Jaw crusher

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