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Mechanical Operations

Mechanical Operations
Dust laden air can be purified using a

Gravity settler
Bag filter
Cyclone separator
Tubular centrifuge

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Mechanical Operations
Which of the following is the most suitable filter for separation of abrasive solids suspended in a corrosive liquid?

Batch basket centrifuge
Sand bed filter
Plate and frame filter press
Vacuum filter

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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?

0.5
1
0.66
2.76

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Mechanical Operations
Cartridge filters are termed as 'edge' filters, because of the fact that the

None of these
Solids are not deposited at the edge of the disk
Disks have very sharp edge
Bulk of the solids are removed at the periphery of the disks

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Mechanical Operations
A cottrel precipitator makes use of the __________ for dusty air cleaning.

Electric spark
None of these
Corrona discharge
Alternating current

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Mechanical Operations
Which of the following minerals is not subjected to magnetic separation method?

Siderite
Rutile
Galena
Chromite

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