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Mechanical Operations

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

Gyratory crusher
Jaw crusher
None of these
Cone crusher

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Mechanical Operations
In froth floatation, chemical agent added to cause air adherence is called

Frother
Modifier
Activator
Collector

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Mechanical Operations
Which of the following is a batch sedimentation equipment?

Dry cyclone separator
Filter thickener
Dust catcher
Rotary sprayer scrubber

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Mechanical Operations
The critical speed of a trommel (N) is related to its dia (D) as

N ∝ 1/D
N ∝ D
N ∝ 1/√D
N ∝ √D

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Mechanical Operations
Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.

Varying pressure
Constant pressure
Varying rate
Constant rate

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Mechanical Operations
Weber number is significant and is concerned with the

Suspension of solid in liquid
Dispersion of liquid in liquid
Solid-liquid mixing
Liquid-liquid mixing

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