A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is

Mechanical Operations
A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is

½w² . R . ρL(R + 2δ)

½w² . δρL (2R + δ)

½w² . δ² . ρL

½w² . R² . ρL

½w² . R . ρL(R + 2δ)

½w² . δρL (2R + δ)

½w² . δ² . ρL

½w² . R² . ρL

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Mechanical Operations
In filtration, the use of 'filter aid' helps in

Enhancing the cake porosity in case of a dense impermeable cake

Deplugging the filter medium

Accelerating the rate of filtration

Reducing the filtration pressure

Enhancing the cake porosity in case of a dense impermeable cake

Deplugging the filter medium

Accelerating the rate of filtration

Reducing the filtration pressure

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Mechanical Operations
Stamp mills are generally used for crushing

Talc

Gold ores

Iron ores

Diamond

Talc

Gold ores

Iron ores

Diamond

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Mechanical Operations
Vibrating screens have capacity in the range of __________ tons/ft² .mm mesh size.

50 to 100

5 to 25

100 to 250

0.2 to 0.8

50 to 100

5 to 25

100 to 250

0.2 to 0.8

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Mechanical Operations
Pine oil used in froth floatation technique acts as a/an

Frother

Collector

Activator

Modifier

Frother

Collector

Activator

Modifier

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Mechanical Operations
Pick out the wrong statement pertaining to the roll crushers.

For hard material's crushing, the reduction ratio should not exceed 4

Both the rolls run necessarily at the same speed

Maximum feed size determines the required roll diameter

Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced

For hard material's crushing, the reduction ratio should not exceed 4

Both the rolls run necessarily at the same speed

Maximum feed size determines the required roll diameter

Reduction ratio and differential roll speed affect production rate & energy consumed per unit of surface produced

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Mechanical Operations

Mechanical Operations In filtration, the use of 'filter aid' helps in

Mechanical Operations Stamp mills are generally used for crushing

Mechanical Operations Vibrating screens have capacity in the range of __________ tons/ft² .mm mesh size.

Mechanical Operations Pine oil used in froth floatation technique acts as a/an

Mechanical Operations Pick out the wrong statement pertaining to the roll crushers.

Mechanical Operations
In filtration, the use of 'filter aid' helps in

Mechanical Operations
Stamp mills are generally used for crushing

Mechanical Operations
Vibrating screens have capacity in the range of __________ tons/ft² .mm mesh size.

Mechanical Operations
Pine oil used in froth floatation technique acts as a/an

Mechanical Operations
Pick out the wrong statement pertaining to the roll crushers.