Top 550+ Solved Mass Transfer MCQ Questions Answer
Q. Which of the following is a suitable absorbent for removal of H2S from natural gas?
a. Vetrocoke solution
b. Monoethanolamine (MEA)
c. Dilute
d. Hot water
Q. Raoult's law is applicable to the
a. Ideal solutions
b. Real solutions
c. Mixture of water and alcohol
d. Non-ideal gases
Q. Humid volume is the total volume in m3 of 1 kg of
a. Vapour laden gas at 1 atm. and room temperature
b. Gas plus its accompanying vapour at 1 atm. and room temperature
c. Gas plus its accompanying vapour at 1 atm. and gas temperature
d. Vapour laden gas at 1 atm. and gas temperature
Q. Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer.
a. Rotary
b. Vacuum
c. Tunnel
d. Tray
Q. Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation.
a. Molecular
b. Extractive
c. Steam
d. Simple
Q. Pick out the system with minimum boiling azeotrope at 1 atm.
a. Benzene-toluene
b. Ethyl alcohol-water
c. Hydrochloric acid-water
d. All (A), (B) and (C)
Q. Unsaturated air (with dry bulb and wet bulb temperatures being 45°C and 25°C respectively) is passed through a water spray chamber maintained at 23°C. The air will be cooled and
a. Humidified with wet bulb temperature decreasing
b. Humidified at constant wet bulb temperature
c. Dehumidified
d. None of these
Q. The film penetration model of mass transfer was enunciated by
a. Gilliland
b. Toor and Marcello
c. Stefan
d. Fick
Q. Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture?
a. Anthracite coal
b. Rag paper
c. Bamboo
d. Inorganic solids
Q. (NRe . NSc) is termed in mass transfer operation as the __________ number.
a. Stanton
b. Sherwood
c. Peclet
d. None of these
Q. At a given equilibrium pressure, with increase in temperature, the concentration of adsorbed gas on solid adsorbent
a. Increases
b. Decreases
c. Remains unchanged
d. Increases exponentially
Q. With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux
a. Increases
b. Decreases
c. Remain same
d. May increase or decrease; depends on system
Q. 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
Q. The operation involved when the soluble material is largely on the surface of an insoluble solid and is merely washed off by the solvent is called
a. Decoction
b. Percolation
c. Elutriation or elution
d. None of these
Q. __________ number indicates the ratio of the rates of the heat and mass transfer incase of acooling tower.
a. Sherwood
b. Stanton
c. Lewis
d. Peclet