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Mechanical Operations

Mechanical Operations
Trommels employ __________ for screening of materials.

None of these
Punched plate
Woven wire screen
Fibrous cloth

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Mechanical Operations
Hot, lumpy & abrasive materials are best transported by using a/an __________ conveyor.

Apron
Flight
Belt
Screw

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Mechanical Operations
Sizing of very fine particles of the order of 5 to 10 microns is done by elutriation, which is a __________ operation.

Sedimentation
Flocculation
Classification
Clarification

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Mechanical Operations
Ultracentrifuges running at speeds upto 100000 rpm is normally used for the

Separation of isotopes based on their density or molecular weights difference
Dewaxing of lubricating oil
Concentration of rubber latex
Separation of cream from milk

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Mechanical Operations
As per Taggart's formula, the capacity (kg/hr) of Jaw & Gyratory crushers (for gapes of 10 to 60 cms) is equal to (where, L = Length of feed opening, cms S = Maximum width of discharge opening, cms )

√LS
93 LS
LS
250 LS

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Mechanical Operations
The power number for a stirred tank becomes constant at high Reynolds number. In this limit, the variation of power input with impeller rotational speed (N) is proportional to

N¹
N°
N²
N³

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