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Mechanical Operations

Mechanical Operations
Length/diameter ratio of a ball mill is

> 1
1
1.5
< 1

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Mechanical Operations
Where the density difference of the two liquid phase to be separated is very small (as in milk cream separator), the most suitable separator is a

Disc bowl centrifuge
Batch basket centrifuge
Sparkler filter
Sharpies supercentrifuge

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Mechanical Operations
Shape factor for a cylinder whose length equals its diameter is

2.0
0.5
1.0
1.5

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Mechanical Operations
Which of the following is not a cutting machine?

Tube mills
Slitters
Dicers
Knife cutters

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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/R
All of these
S
1/μ

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Mechanical Operations
In the cyclone separator used for separation of dust from dust laden gas, the gas

Both B and C
Develops a helical motion inside the chamber
Enters the cyclone from the top
Is admitted tangentially at high velocity

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