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Mechanical Operations

Mechanical Operations
Additives used for promoting the floccula-tion of particles is a/an

Neither A nor B
Electrolyte
Both A & B
Surface active agent

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Mechanical Operations
To get a fine talc powder from its granules, the equipment used is

Gyratory crusher
Ball mill
Jaw crusher
Roller crusher

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Mechanical Operations
The filtrate flow rate in constant pressure filtration

May increase or decrease ; depends on the pressure
Continuously decreases
Continuously increases
Remains constant throughout

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Mechanical Operations
Size reduction mechanism used in Jaw crushers is

Cutting
Attrition
Compression
Impact

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Mechanical Operations
Number of particles in a crushed solid sample is given by (where, m = mass of particles in a sample, Vp = volume of one particle, ρ= density of particles)

Vp/m . ρ
M . Vp/ρ
M . ρ/Vp
M/ρ . Vp

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Mechanical Operations
Pick out the material having minimum Rittinger's number.

Calcite
Quartz
Pyrite
Galena

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