In an absorber, HETP does not vary with the

HETP is numerically equal to HTU, only when the operating line

A

Lies below the equilibrium line

B

Lies above the equilibrium line

C

And equilibrium lines are parallel

D

Is far from the equilibrium line

The practical representative values of HETP for a number of commercial operations lies within a range of __________ metre.

A

0.1-0.2

B

0.2-0.5

C

0.4-0.9

D

1.2-1.5

Which of the following quantities need not be fixed before starting the design of a co-current absorber?

A

Heat gain or loss

B

Flow rate of entering liquid

C

Flow rate of gas

D

None of these

In case of an absorber, the operating

A

Line always lies above the equilibrium curve

B

Line always lies below the equilibrium curve

C

Line can be either above or below the equilibrium curve

D

Velocity is more than the loading velocity

Which of the following acts as an insulator against heat, cold and as a shock-absorber in the body?

A

Dermis

B

Epidermis

C

Subcutaneous fat layer

D

None of the above

If G = insoluble gas in gas stream and L = non-volatile solvent in liquid stream, then the slope of the operating line for the absorber is

A

$$\frac{{\text{L}}}{{\text{G}}}$$

B

$$\frac{{\text{G}}}{{\text{L}}}$$

C

Always

D

None of these

For the same system, if the same liquid used in an absorber is decreased, the tower height will

A

Increase

B

Decrease

C

Remain unaffected

D

Decrease or increase ; depends on the type of liquid

For a single component absorber, the operating line is straight only when plotted in term of __________ units.

A

Partial pressure

B

Mole ratio

C

Mole fraction

D

None of these

The slope of the operating line for a single component co-current absorber when plotted in terms of mole ratio units is

A

0

B

∞

C

-ve

D

+ve

Desirable value of absorption factor in an absorber is

A

1

B

> 1

C

0.5

In an absorber, HETP does not vary with the

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