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Mechanical Operations

Mechanical Operations
Which of the following clay mixing devices is vacuum operated for deairation of clay?

Pug mill
Banbery mixer
Muller-mixer
None of these

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Mechanical Operations
The specific cake resistance for compressible sludges is a function of the pressure drop

Over cake
Over medium
Overall
None of these

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Mechanical Operations
Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an

Air filter
Venturi scrubber
Hydrocyclones
Bag filter

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Mechanical Operations
A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is

0.4
0.6
0.1
None of these

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Mechanical Operations
Screw conveyors are

Suitable for highly abrasive materials
Suitable for sticky materials
All of these
Run at very high rpm

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Mechanical Operations
Filter medium resistance is important during the __________ of filtration.

Final stages
Entire process
Early stages
None of these

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