A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is

Mechanical Operations
A suspension of glass beads in ethylene glycol has a hindered settling velocity of 1.7 mm/s, while the terminal settling velocity of a single glass bead in ethylene glycol is 17 mm/s. If the Richardson-Zaki hindered settling index is 4.5, the volume fraction of solids in the suspension is

0.1

0.4

None of these

0.6

0.1

0.4

None of these

0.6

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Mechanical Operations
The most common filter aid is

Diatomaceous earth

Sodium carbonate

Calcium silicate

Silica gel

Diatomaceous earth

Sodium carbonate

Calcium silicate

Silica gel

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Mechanical Operations
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

At the end of filtration

At the end of filtration, but decreases with time subsequently

At time zero

When half the filtrate has been obtained

At the end of filtration

At the end of filtration, but decreases with time subsequently

At time zero

When half the filtrate has been obtained

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Mechanical Operations
Froth floatation is the most suitable for treating

Iron ores

None of these

Quartzite

Sulphide ores

Iron ores

None of these

Quartzite

Sulphide ores

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Mechanical Operations
Limestone is normally crushed in a

Tube mill

Hammer crusher

Roll crusher

Ball mill

Tube mill

Hammer crusher

Roll crusher

Ball mill

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Mechanical Operations
__________ baffles are provided in ball mills.

Only two

None of these

No

Horizontal

Only two

None of these

No

Horizontal

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Mechanical Operations

Mechanical Operations The most common filter aid is

Mechanical Operations During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

Mechanical Operations Froth floatation is the most suitable for treating

Mechanical Operations Limestone is normally crushed in a

Mechanical Operations __________ baffles are provided in ball mills.

Mechanical Operations
The most common filter aid is

Mechanical Operations
During washing of filter at the end of constant pressure filtration, the rate of washing equals the rate of filtration

Mechanical Operations
Froth floatation is the most suitable for treating

Mechanical Operations
Limestone is normally crushed in a

Mechanical Operations
__________ baffles are provided in ball mills.