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Mechanical Operations

Mechanical Operations
Gelatinous solid (which plug the septum) can be filtered by a __________ filter.

Plate and frame
Sparkler
Precoat
Vacuum leaf

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Mechanical Operations
What is the critical rotation speed in revolutions per second, for a ball mill of 1.2 m diameter charged with 70 mm dia balls?

2.76
1
0.66
0.5

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Mechanical Operations
Removal of activated carbon from glycerine is done by

None of these
Batch basket centrifuge
Plate and frame filter
Rotary vacuum filter

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Mechanical Operations
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

When half the filtrate has been obtained
At the end of filtration
At the end of filtration, but decreases with time subsequently
At time zero

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Mechanical Operations
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the

Concentration of rubber latex
Separation of isotopes based on their density or molecular weights difference
Dewaxing of lubricating oil
Separation of cream from milk

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Mechanical Operations
The inlet pressure in a constant rate filtration

Remains constant
Decreases gradually
None of these
Increases continuously

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