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Mechanical Operations

Mechanical Operations
The term 'angle of nip' is concerned with the operation of the __________ crushers.

Roll
None of these
Jaw
Gyratory

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Mechanical Operations
Size reduction of the __________ can be suitably done by ball mills, crushing rolls and rod mills.

Basic slags
Metalliferrous ores
Non-metallic ores
Asbestos & mica

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Mechanical Operations
Gold ore concentration is mostly done using

Tabling
Elutriation
Froth floatation
Jigging

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Mechanical Operations
The work index in Bond's law for crushing of solids has the following dimensions

KW/ton
KWh/ton
No units (dimensionless)
KWh.m1/2/ton

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Mechanical Operations
The capacity of a belt conveyor depends upon two factors. If one is the cross-section of the load, the other is the __________ of the belt.

Speed
Length
Thickness
None of these

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Mechanical Operations
Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of

Flint or porcelain
Bronze
Stainless steel
Concrete

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