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Mechanical Operations

Mechanical Operations
__________ are used for the separation of coarse particles from a slurry of fine particles.

Hydrocyclones
Classifiers
Thickeners
Decanters

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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

1/2
1
1/4
4

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Mechanical Operations
Size reduction mechanism used in Jaw crushers is

Impact
Cutting
Compression
Attrition

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Mechanical Operations
Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity?

Cylinder (L/D = 1)
Cube
Sphere
Raschig rings

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Mechanical Operations
Agglomeration of individual particles into clusters (flocs) is called flocculation. To prevent flocculation, the most commonly used dispersing agents are

Carbonates
Bi-carbonates
Sulphates
Silicates & phosphates

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Mechanical Operations
Which is the most suitable conveyor for transportation of sticky material?

Belt conveyor
Screw conveyor
Pneumatic conveyor
Apron conveyor

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