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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
Gyratory crusher
Cone crusher
Jaw crusher

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Mechanical Operations
During agitation of liquids, power consumption during laminar flow is not proportional to the

Cube of impeller diameters
Viscosity of the liquid
Density of the liquid
Square of rotational speed

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Mechanical Operations
Which is a secondary crusher for a hard & tough stone?

Jaw crusher
Impact crusher
Toothed roll crusher
Cone crusher

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Mechanical Operations
The study on washability of coal is done by using the __________ technique.

Heavy media separation
None of these
Tabling
Elutriation

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Mechanical Operations
Sedimentation on commercial scale occurs in

Thickeners
Rotary drum filters
Cyclones
Classifiers

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Mechanical Operations
Cake resistance is

Independent of pressure drop
None of these
Decreased with the time of filtration
Important in the beginning of filtration

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