Top 550+ Solved Mass Transfer MCQ Questions Answer
Q. Solvent used in extractive distillation
a. Is of low volatility
b. Forms a low boiling azeotrope
c. Forms a high boiling azeotrope
d. Does not alter the relative volatility of the original components
Q. When the feed to a distillation column is a saturated liquid, slope of the feed line is
a. Zero
b. Unity
c. Infinity
d. None of these
Q. The absorption factor is defined as (where, L = liquid flow rate, G = gas flow rate and, m = slope of the equilibrium line).
a. L/mG
b. G/mL
c. mL/G
d. LG/m
Q. Chemisorption (chemical adsorption) is
a. Same as "Van der Waals" adsorption
b. Characterised by adsorption of heat
c. An irreversible phenomenon
d. A reversible phenomenon
Q. Inside the distillation column, the
a. Driving force for the vapour flow is the pressure drop
b. Liquids are not always at their bubble points
c. Pressure increases gradually from bottom to the top of the column
d. None of these
Q. Dry bulb temperature of unsaturated air is more than its __________ temperature.
a. Dew point
b. Wet bulb
c. Both 'a' & 'b'
d. Neither 'a' nor 'b'
Q. Boiling point diagram is not affected by the ambient
a. Pressure
b. Humidity
c. Temperature
d. Both (B) and (C)
Q. Total reflux in a distillation operation requires minimum
a. Reboiler load
b. Number of plates
c. Condenser load
d. All (A), (B) and (C)
Q. Inside the distillation columns, the
a. Highest temperatures is near the feed plate
b. Driving force for the liquid flow is its weight
c. Vapors are not always at their dew points
d. All (A), (B) and (C)
Q. An Azeotropic mixture is a __________ mixture.
a. Binary
b. Ternary
c. Constant boiling point
d. None of these
Q. The change in enthalpy per unit weight of adsorbed gas when adsorbed on gas free or "outgassed" adsorbent to from a definite concentration of adsorbate is called its
a. Integral heat of adsorption
b. Heat of wetting
c. Differential heat of adsorption
d. Heat of normal condensation
Q. 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 (A), (B) and (C)
Q. Which of the following remains constant during evaporative cooling process with recirculated water supply?
a. Relative humidity
b. Partial pressure of vapour
c. Wet bulb temperature
d. None of these
Q. Weight of 1 m3 of humid air as compared to 1 m3 of dry air, under the same conditions, is
a. Less
b. More
c. Same
d. Unpredictable