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Mechanical Operations

Mechanical Operations
Sphericity of pulverised coal is

1
∞
>1

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Mechanical Operations
Solid particles separation based on the difference in their flow velocities through fluids is termed as the

Clarification
Elutriation
Sedimentation
Classification

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Mechanical Operations
Trommels employ __________ for screening of materials.

None of these
Fibrous cloth
Punched plate
Woven wire screen

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Mechanical Operations
Specific surface area is the surface area of a unit __________ of materials.

Either A or B
Weight
Volume
Neither A nor B

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Mechanical Operations
Filtration rate through a filter cake is proportional to (where, S = filtering surface R = specific cake resistance μ = viscosity of the filtrate)

All of these
S
1/μ
1/R

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Mechanical Operations
Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid?

Vacuum filter
Plate and frame filter press
Batch basket centrifuge
Sand bed filter

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