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

0.6

None of these

0.4

0.1

0.6

None of these

0.4

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Mechanical Operations
Mixing mechanism employed in a pan mixer is by

Kneading

Dispersion

None of these

Mulling

Kneading

Dispersion

None of these

Mulling

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Mechanical Operations
Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed?

Wet grinding in high viscous suspension

Wet grinding in low viscous suspension

Dry grinding of large particles (upto 1.25 cms)

Dry grindng of large particles in un-baffed mills

Wet grinding in high viscous suspension

Wet grinding in low viscous suspension

Dry grinding of large particles (upto 1.25 cms)

Dry grindng of large particles in un-baffed mills

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Mechanical Operations
With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge

Increases

Increases linearly

Decreases

Remains constant

Increases

Increases linearly

Decreases

Remains constant

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Mechanical Operations
For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a

Ball mill

Buhrstone mill

Crushing rolls

Hammer mill

Ball mill

Buhrstone mill

Crushing rolls

Hammer mill

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Mechanical Operations
Tank filter (e.g., Nutsch filter) is

A continuous filter

A high pressure filter

Used for small scale filtration work

A leaf filter

A continuous filter

A high pressure filter

Used for small scale filtration work

A leaf filter

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Mechanical Operations

Mechanical Operations Mixing mechanism employed in a pan mixer is by

Mechanical Operations Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed?

Mechanical Operations With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge

Mechanical Operations For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a

Mechanical Operations Tank filter (e.g., Nutsch filter) is

Mechanical Operations
Mixing mechanism employed in a pan mixer is by

Mechanical Operations
Actual operating speed of a ball mill may vary from 65 to 80% of the critical speed. Which of the following duties would require the ball mill to be operated at maximum percentage of critical speed?

Mechanical Operations
With increase in the pressure drop across the cake, the specific cake resistance for the compressible sludge

Mechanical Operations
For grinding of cereals, grains, spices, pigments, saw dust, cork etc., the most extensively used size reduction equipment is a

Mechanical Operations
Tank filter (e.g., Nutsch filter) is