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Mechanical Operations

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

Frother
Activator
Collector
Modifier

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Mechanical Operations
Which of the following is a coarse crusher?

Gyratory crusher
Smooth roll crusher
Tube mill
Toothed roll crusher

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Mechanical Operations
Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle).

S/V
V/6D.S
6.V/D.S
V/D.S

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Mechanical Operations
The maximum slope of a belt conveyor can be

45°
15°
60°
30°

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Mechanical Operations
Which of the following is not accomplished by agitation of liquids in agitators?

Suspending solid particles
Blending of immiscible liquids
Dispersing gas in liquid
Dispersing immiscible liquid in form of emulsion

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Mechanical Operations
Filtration capacity of a rotary drum vacuum filter depends upon the

Characteristics of the feed slurry
Neither A nor B
Cake thickness
Both A & B

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