Mass Transfer MCQ Questions & Answers | Chemical Engineering Page-9 section-2

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

81.
If a two phase system is in physical equilibrium; then it means that, the

A. Escaping tendency of each component from the liquid phase to the vapor phase is exactly equal to that from vapor phase to liquid phase

B. Temperature of the liquid phase is equal to that of the vapor phase

C. Total pressure throughout the liquid phase is equal to that throughout the vapor phase

D. All of the above

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82.
Mass transfer co-efficient is directly proportional to D_AB^0.5, according to __________ theory.

A. Penetration

B. Surface renewal

C. Film

D. None of these

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83.
Which of the following provides maximum contact surface for a liquid-vapour system?

A. Packed tower

B. Bubble-cap plate column

C. Seive-plate column

D. Wetted wall column

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84.
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

A. q > 1

B. q < 1

C. q = 1

D. q = 0

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85.
Pick out the wrong statement.

A. Different solids have different equilibrium moisture curves

B. Total condenser or reboiler is considered equivalent to one theoretical plate in McCabe-Thiele method of theoretical plate calculation for distillation column

C. Heat removal load on cooler remains constant, even with increase of the reflux ratio in a distillation column

D. Even a forced draft cooling tower can not cool water below the wet bulb temperature

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86.
A slurry is to be dried to produce flaky solid. Which dryer would you recommend?

A. Spray dryer

B. Drum dryer

C. Rotary dryer

D. Dielectric dryer

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87.
Channelling is most severe

A. In towers packed with stacked packing

B. In towers packed randomly with crushed solids

C. In dumped packing of regular units

D. At very high liquid flow rate

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88.
CO₂ can be absorbed by

A. Hot cupric oxide

B. Heated charcoal

C. Cold Ca(OH)₂

D. Alumina

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89.
Pick out the correct statement.

A. The slope of the stripping line is always less than unity

B. For a given separation in a binary distillation column, with increase in reflux ratio (above the minimum reflux ratio), the fixed cost of the distillation column first increases and then decreases

C. In Ponchon-Savarit method of no. of theoretical plate determination, the stripping and rectifying operating lines are vertical at total reflux

D. Kremsor-Brown-Souder's equation is used to calculate the efficiency of a plate tower

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90.
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

A. Degree of ideality

B. Viscosity

C. Both A & B

D. Neither A nor B

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Mass Transfer MCQ Questions & Answers | Chemical Engineering

81. If a two phase system is in physical equilibrium; then it means that, the

Answer & Solution

82. Mass transfer co-efficient is directly proportional to DAB0.5, according to __________ theory.

Answer & Solution

83. Which of the following provides maximum contact surface for a liquid-vapour system?

Answer & Solution

84. In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

Answer & Solution

85. Pick out the wrong statement.

Answer & Solution

86. A slurry is to be dried to produce flaky solid. Which dryer would you recommend?

Answer & Solution

87. Channelling is most severe

Answer & Solution

88. CO2 can be absorbed by

Answer & Solution

89. Pick out the correct statement.

Answer & Solution

90. Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.

Answer & Solution

Read More Section(Mass Transfer)

81.
If a two phase system is in physical equilibrium; then it means that, the

82.
Mass transfer co-efficient is directly proportional to D_AB^0.5, according to __________ theory.

83.
Which of the following provides maximum contact surface for a liquid-vapour system?

84.
In distillation where q is defined as the moles of liquid flow in the stripping section per mole of feed introduced, for saturated liquid feed

85.
Pick out the wrong statement.

86.
A slurry is to be dried to produce flaky solid. Which dryer would you recommend?

87.
Channelling is most severe

88.
CO₂ can be absorbed by

89.
Pick out the correct statement.

90.
Diffusion in concentrated solutins differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution.