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Mechanical Operations

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/R
1/μ
S
All of these

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Mechanical Operations
Vibrating screens have capacity in the range of __________ tons/ft² .mm mesh size.

5 to 25
100 to 250
0.2 to 0.8
50 to 100

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Mechanical Operations
Which of the following is not a revolving/tumbling mill used for size reduction?

Cage mill
Compartment mill
Pebble mill
Rod mill

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Mechanical Operations
__________ mill is not used for grinding wheat into flour and for milling of cereals & other vegetable products.

Attrition
Buhrstone
Roller
Pebble

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Mechanical Operations
For spheres, volume shape factor is given by

2π(=2A/D²)
AD/V
π/6(=V/D³)
π(=A/D²)

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Mechanical Operations
The energy consumed by a ball mill depends on

Its speed
The density of the material being ground
Its ball load
All of these

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