Filtration rate does not depend upon the

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

A

At time zero

B

At the end of filtration

C

When half the filtrate has been obtained

D

At the end of filtration, but decreases with time subsequently

Filtration operation carried out by continuous increase of the inlet pressure of slurry, is called the __________ filtration.

A

Constant rate

B

Varying pressure

C

Varying rate

D

Constant pressure

The cake resistance increases steadily with the time of filtration in a plate and frame filter employing constant __________ filtration.

A

Rate

B

Pressure

C

Both A & B

D

Neither A nor B

A centrifugal filtration unit operating at a rotational speed of w has inner surface of the liquid (density ρL) located at a radial distance R from the axis of rotation. The thickness of the liquid film is δ and no cake is formed. The initial pressure drop during filtration is

A

$$\frac{1}{2}$$w².R².ρL

B

$$\frac{1}{2}$$w².δ².ρL

C

$$\frac{1}{2}$$w².δ.ρL(2R + δ)

D

$$\frac{1}{2}$$w².R.ρL(R + 2δ)

The rate of emission of radiation by a body does not depend upon the

A

Wavelength of radiation

B

Surface temperature of the body

C

Nature of the surface

D

Shape and porosity of the body

Heat transfer rate to the stock/charge in the furnace does not depend upon the

A

Emissivity of the refactory walls

B

Size of the furance

C

Use of waste heat recovery equipments

D

Thickness of the stock

Heat transfer rate to the charge/stock in a furnace does not depend upon the

A

Type of fuels viz solid, liquid or gaseous

B

Flue gas temperature

C

Emissivity of refractory walls

D

Initial temperature of the charged stock

Rate of crystallisation does not depend upon the

A

Extent of supersaturation

B

Turbulence within the solution

C

Number and active surface area of the crystals

D

None of these

If there are no externally induced flow velocities, then the Nusselt Number (Nu) does not depend upon

A

Prandtl number

B

Reynolds number

C

Grashof Number

D

none of the

When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon

A

Resistance of the coil

B

Motion of the magnet

C

Number of turns of the coil

D

Pole strength of the magnet

Filtration rate does not depend upon the

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