Tabular bowl centrifuges as compared to disk bowl centrifuges

Mechanical Operations
Tabular bowl centrifuges as compared to disk bowl centrifuges

Employ bowl of larger diameter

Can not be operated under pressure/vacuum

Operate at higher speed

Can't be used for separation of fine suspended solids from a liquid

Employ bowl of larger diameter

Can not be operated under pressure/vacuum

Operate at higher speed

Can't be used for separation of fine suspended solids from a liquid

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Mechanical Operations
In the cyclone separator used for separation of dust from dust laden gas, the gas

Enters the cyclone from the top

Develops a helical motion inside the chamber

Is admitted tangentially at high velocity

Both B and C

Enters the cyclone from the top

Develops a helical motion inside the chamber

Is admitted tangentially at high velocity

Both B and C

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Mechanical Operations
Bond crushing law

States that the work required for the crushing is proportional to the new surface created

States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

Calls for relatively less energy for the smaller product particles, than does the Rittinger law

Is less realistic in estimating the power requirements of commercial crushers

States that the work required for the crushing is proportional to the new surface created

States that the work required to form particle of any size from very large feed is proportional to the square root of the volume to surface ratio of the product

Calls for relatively less energy for the smaller product particles, than does the Rittinger law

Is less realistic in estimating the power requirements of commercial crushers

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Mechanical Operations
Use of 'grinding aids' is done in __________ grinding.

Intermediate

Ultrafine

Dry

Wet

Intermediate

Ultrafine

Dry

Wet

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Mechanical Operations
Bucket elevators are not suitable for the vertical lifting of __________ materials.

Small lumpy (e.g. grains and sand)

Free flowing

Sticky (e.g. clay paste)

Fine (e.g. - 200 mesh size coal)

Small lumpy (e.g. grains and sand)

Free flowing

Sticky (e.g. clay paste)

Fine (e.g. - 200 mesh size coal)

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Mechanical Operations
Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle).

V/6D.S

V/D.S

6.V/D.S

S/V

V/6D.S

V/D.S

6.V/D.S

S/V

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Mechanical Operations

Mechanical Operations Tabular bowl centrifuges as compared to disk bowl centrifuges

Mechanical Operations In the cyclone separator used for separation of dust from dust laden gas, the gas

Mechanical Operations Bond crushing law

Mechanical Operations Use of 'grinding aids' is done in __________ grinding.

Mechanical Operations Bucket elevators are not suitable for the vertical lifting of __________ materials.

Mechanical Operations Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle).

Mechanical Operations
Tabular bowl centrifuges as compared to disk bowl centrifuges

Mechanical Operations
In the cyclone separator used for separation of dust from dust laden gas, the gas

Mechanical Operations
Bond crushing law

Mechanical Operations
Use of 'grinding aids' is done in __________ grinding.

Mechanical Operations
Bucket elevators are not suitable for the vertical lifting of __________ materials.

Mechanical Operations
Sphericity for a non-spherical particle is given by (where, V and S are volume and surface area respectively of one particle. and, D = equivalent diameter of particle).