At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5 : Power number Re = ρ N D2/μ: Reynold's number N is the impeller rotational speed, and D is the impeller diameter.

Mechanical Operations
At low Reynold's number, the power (P) required for agitating a fluid in a stirred tank becomes independent of inertial forces. In this limit, indicate which of the following relations is satisfied: Po = ρ/ρN3 D5 : Power number Re = ρ N D2/μ: Reynold's number N is the impeller rotational speed, and D is the impeller diameter.

Po ∝ Re1.0

Po ∝ Re-1.0

Po ∝ Re0.5

Po ∝ Re0.0

Po ∝ Re1.0

Po ∝ Re-1.0

Po ∝ Re0.5

Po ∝ Re0.0

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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, but decreases with time subsequently

When half the filtrate has been obtained

At time zero

At the end of filtration

At the end of filtration, but decreases with time subsequently

When half the filtrate has been obtained

At time zero

At the end of filtration

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Mechanical Operations
Traces of liquid tar fog present in coke oven gas is separated using

Electrostatic precipitator

Cyclone separator

Strainer

None of these

Electrostatic precipitator

Cyclone separator

Strainer

None of these

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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

Maximum feed size determines the required roll diameter

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

Both the rolls run necessarily at the same speed

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

Maximum feed size determines the required roll diameter

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

Both the rolls run necessarily at the same speed

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Mechanical Operations
In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing.

Primary

Secondary

Ultrafine

Fine

Primary

Secondary

Ultrafine

Fine

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Mechanical Operations
Cartridge filters are termed as 'edge' filters, because of the fact that the

None of these

Bulk of the solids are removed at the periphery of the disks

Disks have very sharp edge

Solids are not deposited at the edge of the disk

None of these

Bulk of the solids are removed at the periphery of the disks

Disks have very sharp edge

Solids are not deposited at the edge of the disk

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Mechanical Operations

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

Mechanical Operations Traces of liquid tar fog present in coke oven gas is separated using

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

Mechanical Operations In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing.

Mechanical Operations Cartridge filters are termed as 'edge' filters, because of the fact that the

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

Mechanical Operations
Traces of liquid tar fog present in coke oven gas is separated using

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

Mechanical Operations
In a size reduction crushing operation, feed size is 100 to 300 mm. while the product size is 10 to 50 mm. This is a case of the __________ crushing.

Mechanical Operations
Cartridge filters are termed as 'edge' filters, because of the fact that the