Mass Transfer MCQ Questions & Answers | Chemical Engineering Page-4 section-4

Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7

31.
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

Answer & Solution Discuss in Board Save for Later

32.
Pick out the wrong statement.

A. The Reynolds analogy for mass transfer is given by Lewis relation and is applicable, when Schmidt number is one

B. Sherwood number for flow in pipes can be expressed as the ratio of the concentration gradient at wall to the overall concentration difference

C. According to film theory for equimolar counter diffusion, the mass transfer coefficient is given by $$\sqrt {{{\text{D}}_{{\text{AB}}}}} $$ (b)P - 3, Q - 2

D. The z-component of the total mass flux of a component A in binary mixture of A and B is given by - Dab'.dC_A/dz

Answer & Solution Discuss in Board Save for Later

33.
In azeotropic mixture, the equilibrium vapour composition is

A. More than liquid composition

B. Less than liquid composition

C. Same as liquid composition

D. Independent of pressure

Answer & Solution Discuss in Board Save for Later

34.
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,

A. As the acetone concentration increases, the solubility curves approach each other

B. Both the phases become identical at a particular common point on both the solubility curves called the plait point

C. The distribution curve which is a plot between x (acetone concentration in one phase) and y (acetone concentration in other phase) is analogous to x - y curve used in distillation and absorption terminates on the x = y diagonal at the concentration of the plait point

D. All of the above

Answer & Solution Discuss in Board Save for Later

35.
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

A. At < 100

B. At > 210.6

C. Between 100 and 210

D. None of these

Answer & Solution Discuss in Board Save for Later

36.
Which of the following has the same dimension as mass diffusivity?

A. Momentum flux

B. Kinematic viscosity

C. Thermal diffusivity

D. Both A & B

Answer & Solution Discuss in Board Save for Later

37.
Priming in a distillation column

A. Results from very low gas velocity

B. Is desirable from point efficiency consideration

C. Is characterised by the presence of foam throughout the space between trays

D. Reduces the overall pressure drop

Answer & Solution Discuss in Board Save for Later

38.
In case of unsaturated air

A. Dew point < wet bulb temperature

B. Wet bulb temperature < dry bulb temperature

C. Both A & B

D. Neither A nor B

Answer & Solution Discuss in Board Save for Later

39.
Water entrained by circulating air in cooling towers is termed as

A. Drift

B. Blow down

C. Vapor load

D. None of these

Answer & Solution Discuss in Board Save for Later

40.
In saturated gas, the

A. Vapour is in equilibrium with the liquid at the gas temperature

B. Vapour is in equilibrium with the liquid at the room temperature

C. Partial pressure of vapour equals the vapour pressure of the liquid at room temperature

D. None of these

Answer & Solution Discuss in Board Save for Later

1 2 3 4 5 6 7 8 9 10

Mass Transfer MCQ Questions & Answers | Chemical Engineering

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

Answer & Solution

32. Pick out the wrong statement.

Answer & Solution

33. In azeotropic mixture, the equilibrium vapour composition is

Answer & Solution

34. When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,

Answer & Solution

35. Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

Answer & Solution

36. Which of the following has the same dimension as mass diffusivity?

Answer & Solution

37. Priming in a distillation column

Answer & Solution

38. In case of unsaturated air

Answer & Solution

39. Water entrained by circulating air in cooling towers is termed as

Answer & Solution

40. In saturated gas, the

Answer & Solution

Read More Section(Mass Transfer)

31.
Which of the following quantities need not be fixed before starting the design of a co-current absorber?

32.
Pick out the wrong statement.

33.
In azeotropic mixture, the equilibrium vapour composition is

34.
When acetone is added in a two layer mixture of methyl isobutyl ketone and water at 30°C, the acetone distributes between the two layers and the composition of the layer follows two solubility curves. For this system,

35.
Nitrobenzene (boiling point = 210.6°C) is steam distilled at 1 atm pressure.Nitrobenzene will distill off __________ °C.

36.
Which of the following has the same dimension as mass diffusivity?

37.
Priming in a distillation column

38.
In case of unsaturated air

39.
Water entrained by circulating air in cooling towers is termed as

40.
In saturated gas, the