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Mechanical Operations

Mechanical Operations
Cyclones are used primarily for separating

Solids
Solids from fluids
Solids from solids
Liquids

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Mechanical Operations
The reduction ratio for grinders is defined as(where, Df and Dp are average diameters of feed and product respectively).

Dp/Df
Df/Dp
Df - Dp
None of these

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Mechanical Operations
In case of a plate and frame filter press, filtrate flow through the cake follows __________ flow.

Laminar
None of these
Turbulent
Plug

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Mechanical Operations
Kick's law assumes that the energy required for size reduction is proportional to the logarithm of the ratio between the initial and the final diameters. The unit of Kick's constant is

Kg/sec
KW. sec/kg
KWh/sec. kg
KWh/kg

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Mechanical Operations
In bag filters, filter fabrics are never made of

Metallic wire woven mesh
Nylon fibres
Polyester fibres
Cotton fibres

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Mechanical Operations
The most common filter aid is

Silica gel
Diatomaceous earth
Calcium silicate
Sodium carbonate

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