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

0.6

0.1

None of these

0.4

0.6

0.1

None of these

0.4

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Mechanical Operations
Soft & non-abrasive materials can be made into fines by

Cutting

None of these

Attrition

Compression

Cutting

None of these

Attrition

Compression

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Mechanical Operations
Electrical energy consumed by a jaw crusher is not a function of the

Average feed size

Machine capacity

None of these

Average product size

Average feed size

Machine capacity

None of these

Average product size

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Mechanical Operations
What is the selectivity index, if the grade of tailings & concentrate is the same?

∞

0.5

1

∞

0.5

1

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Mechanical Operations
During the washing of cake

Cake resistance decreases

All the resistances are constant

Filter medium resistance decreases

Filter medium resistance increases

Cake resistance decreases

All the resistances are constant

Filter medium resistance decreases

Filter medium resistance increases

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Mechanical Operations
The operating speed of a ball mill should be __________ the critical speed.

At least equal to

Slightly more than

Less than

Much more than

At least equal to

Slightly more than

Less than

Much more than

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Mechanical Operations

Mechanical Operations Soft & non-abrasive materials can be made into fines by

Mechanical Operations Electrical energy consumed by a jaw crusher is not a function of the

Mechanical Operations What is the selectivity index, if the grade of tailings & concentrate is the same?

Mechanical Operations During the washing of cake

Mechanical Operations The operating speed of a ball mill should be __________ the critical speed.

Mechanical Operations
Soft & non-abrasive materials can be made into fines by

Mechanical Operations
Electrical energy consumed by a jaw crusher is not a function of the

Mechanical Operations
What is the selectivity index, if the grade of tailings & concentrate is the same?

Mechanical Operations
During the washing of cake

Mechanical Operations
The operating speed of a ball mill should be __________ the critical speed.