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Mechanical Operations

Mechanical Operations
Sphericity of pulverised coal is

>1
∞
1

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Mechanical Operations
Dust laden air can be purified using a

Tubular centrifuge
Gravity settler
Bag filter
Cyclone separator

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Mechanical Operations
__________ baffles are provided in ball mills.

No
Horizontal
None of these
Only two

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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
Separation of cream from milk
Dewaxing of lubricating oil

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Mechanical Operations
Pebble mills are tumbling mills widely used for grinding in the manufacture of paints & pigments and cosmetic industries, where iron contamination in the product is highly objectionable. Pebbles used in pebble mill are made of

Concrete
Flint or porcelain
Stainless steel
Bronze

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Mechanical Operations
Filtrate flow rate in case of a rotary drum vacuum filter (in which Rm < < Rc) is proportional to __________ and the cycle time (where, μ = filtrate viscosity Rm = filter medium resistance Rc = cake resistance ).

√μ
1/√μ
1/μ
1/μ²

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