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Mechanical Operations

Mechanical Operations
In froth floatation, chemical agent added to cause air adherence is called

Modifier
Frother
Activator
Collector

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Mechanical Operations
Range of compressibility co-efficient of the commercial compressible cake obtained in filtration operation is

0.01 to 0.1
0.1 to 0.3
0.2 to 0.4
0.2 to 0.8

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Mechanical Operations
A. __________ mill is a revolving mill divided into two or more sections by perforated partitions in which preliminary grinding takes place at one end and the finishing grinding at the discharge end.

Pebble
Rod
Tube
Compartment

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Mechanical Operations
A straight line is obtained on plotting reciprocal of filtration rate vs. the volume of filtrate for __________ flow of filtrate.

Compressible cake and turbulent
Incompressible cake and laminar
Compressible cakes and laminar
Incompressible cake and turbulent

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Mechanical Operations
Mass flow of granular solid (M) through a circular opening of dia, D follows

M ∝ √D
M ∝ D³
M ∝ D²
M ∝ D

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Mechanical Operations
Which of the following is not used as a surface active agent in a flocculation operation?

Lime
Quartz
Sodium silicate
Alumina

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