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Mechanical Operations

Mechanical Operations
Optimum ratio of operating speed to critical speed of a trommel is

1.5-2.5
0.33-0.45
0.5-2
1.33-1.45

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

Laminar
Plug
None of these
Turbulent

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Mechanical Operations
__________ centrifuge is the most suitable for separation of non-friable crystals.

Perforated horizontal basket continuous
Disc-bowl
Tubular bowl
Suspended batch basket

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Mechanical Operations
Trommels employ __________ for screening of materials.

None of these
Punched plate
Woven wire screen
Fibrous cloth

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Mechanical Operations
Filtration capacity of a rotary drum vacuum filter depends upon the

Cake thickness
Neither A nor B
Characteristics of the feed slurry
Both A & B

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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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