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Mechanical Operations

Mechanical Operations
The distribution given by microscopic analysis of powder is

Volume
Number
Area
Length

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Mechanical Operations
The value of 'angle of nip' is generally about

52°
64°
16°
32°

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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).

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

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Mechanical Operations
Dispersion of a gas through liquid is done by using a

Kneader
None of these
Sparger
Masticator

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Mechanical Operations
Which of the following conveyors cannot be recommended for transportation of abrasive materials?

Apron conveyor
Chain conveyor
Belt conveyor
Flight conveyor

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Mechanical Operations
The critical speed of a trommel (N) is related to its dia (D) as

N ∝ 1/√D
N ∝ D
N ∝ √D
N ∝ 1/D

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