Top 550+ Solved Mass Transfer MCQ Questions Answer
Q. Heat sensitive materials with very high latent heat of vaporisation may be economically separated using
a. Liquid extraction
b. Distillation
c. Evaporation
d. Absorption
Q. The reciprocal of stripping factor is termed as
a. Selectivity index
b. Relative volatility
c. Absorption factor
d. Murphree efficiency
Q. A distillation column with N plates is being operated under normal conditions. At some point of time, the operation is shifted to total reflux condition (i.e., no product and residue are being withdrawn and feed to the column is stopped). At the new steady state,
a. Composition of vapors and that of liquid do not vary throughout the column
b. Reboiler load and condenser load are minimum
c. The top and bottom compositions are unchanged with and without total reflux
d. The top and bottom compositions correspond to the maximum enrichment available
Q. In distillation columns, the number of bubble caps per tray primarily depends upon the
a. Allowable liquid velocity
b. Allowable gas velocity
c. Allowable gas and liquid velocities
d. Feed composition
Q. Batch tray dryers suffers from the disadvantage of
a. High maintenance cost
b. Non-uniform & low production rate
c. High labour cost & low heat economy
d. All 'a', 'b' & 'c'
Q. For absorbing a sparingly soluble gas in a liquid
a. Gas side mass transfer co-efficient should be increased
b. Liquid side mass transfer co-efficient should be increased
c. Liquid side mass transfer co-efficient should be decreased
d. Mass tr
Q. Smoke is an example of
a. Solid dispersed in liquid
b. Solid dispersed in gas
c. Liquid dispersed in gas
d. Gas dispersed in liquid
Q. Low viscosity absorbent is preferred for reasons of
a. Rapid absorption rates and good heat transfer characteristics
b. Improved flooding characteristics
c. Low pressure drop on pumping
d. All (A), (B) and (C)
Q. The wetted wall tower is used to determine
a. Individual mass transfer co-efficient (M.T.C.) in gaseous system
b. M.T.C. of individual components in a liquid-liquid system
c. M.T.C. of liquid in liquid-gas system
d. The overall M.T.C. of the system
Q. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is
a. 0.50
b. 0.60
c. 1
d. 2
Q. Small dia distillation column can be a
a. Packed column
b. Sieve tray
c. Bubble cap
d. Any of these
Q. The commonly used solvent in supercritical extraction is
a. Methyl ethyl ketone
b. Water
c. Carbon tetrachloride
d. Carbon dioxide
Q. Dried finished product sampled from various parts of a __________ dryer exhibits nonuniformity in the moisture content.
a. Rotary
b. Tray
c. Freeze
d. None of these