MECHANICAL OPERATIONS QUIZ

Linear inch

Linear foot

Square inch

Square foot

Solids are not deposited at the edge of the disk

Disks have very sharp edge

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

None of these

Heavy media separation

Tabling

None of these

Elutriation

3 to 4

8 to 10

10 to 15

15 to 20

π(=A/D²)

AD/V

π/6(=V/D³)

2π(=2A/D²)

Electrolyte

Surface active agent

Both A & B

Neither A nor B

None of these

High V.M. bituminous coal

Coke breeze

Sand

All the resistances are constant

Filter medium resistance increases

Filter medium resistance decreases

Cake resistance decreases

Froude number is used to account for the effect of surface (e.g., the centre vortex) on the power number

All of these

Froude number is independent for the curves between power number and Reynolds number in baffled system

Power number becomes independent of impellers Reynolds number at high Reynolds number, but is dependent on the geometry of the impeller

None of these

Terminal velocities

Densities

Particle sizes