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Mechanical Operations

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

None of these
Cone crusher
Gyratory crusher
Jaw crusher

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Mechanical Operations
Size reduction of fibrous materials like wood, asbestos, mica etc. is done by a disintegrator exemplified by the

Stamp mill
Blake jaw crusher
Bradford's breaker
Cage mill

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Mechanical Operations
In closed circuit grinding as compared to open circuit grinding, the

Operation is economical
Production rate at a given limiting size is lower
Product has lesser size uniformity
Specific surface of product is more

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Mechanical Operations
Pine oil and cresylic acid are used as __________ in the froth floatation process.

Depressor
Frother
Conditioner
Collector

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Mechanical Operations
In washing type plate and frame filter press, the ratio of washing rate to the final filtrate rate is

1
1/4
1/2
4

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Mechanical Operations
Which of the following is not used as a filter medium in case of corrosive liquids?

Glass cloth
Nylon
Cotton fabric
Metal cloth of monel or stainless steel

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