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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
None of these
Jaw crusher
Cone crusher

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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)

1/μ
S
All of these
1/R

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Mechanical Operations
Screen capacity is proportional to (where, S = screen aperture)

√S
S
S²
1/S

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Mechanical Operations
Temperature of the product during ultrafine grinding

Decreases
Remains constant
Increases
May increase or decrease ; depends on the material being ground

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Mechanical Operations
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is

0.01 to 0.1
0.1 to 0.3
0.2 to 0.4
0.2 to 0.8

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Mechanical Operations
General mechanism of size reduction in intermediate and fine grinder is by

Cutting action
Compression
Impact and attrition
Compression and tearing

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