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Mechanical Operations

Mechanical Operations
Soft & non-abrasive materials can be made into fines by

None of these
Cutting
Compression
Attrition

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Mechanical Operations
If dp is the equivalent diameter of a non-spherical particle, Vp its volume and sp its surface area, then its sphericity is Φs is defined by

Φs = dp Sp/Vp
Φs = 6 dp Sp/Vp
Φs = 6 Vp/dp sp
Φs = Vp/dp sp

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Mechanical Operations
Pine oil used in froth floatation technique acts as a/an

Collector
Frother
Modifier
Activator

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Mechanical Operations
A widely used size reduction equipment for __________ is Bradford breaker.

Wheat
Iron core
Coal
Talc

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

Gyratory
None of these
Jaw
Roll

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Mechanical Operations
Size reduction does not occur due to compression in case of

Smooth roll crushers
Jaw crushers
Gyratory crushers
Rod mills

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