Q.1
Large number of flash distillation equals a differential distillation.
  • a) True
  • b) False
Q.2
The column used for differential distillation is_______________
  • a) Still
  • b) Differential column
  • c) Batch column
  • d) None of the mentioned
Q.3
Simple distillation is a___________ process.
  • a) Batch
  • b) Continuous
  • c) Adiabatic
  • d) None of the mentioned
Q.4
The initial portion of the distillate will be a low volatile component.
  • a) True
  • b) False
Q.5
After the separation by differential distillation, the high volatile and low volatile components are stored in _____________
  • a) Batch
  • b) Cuts
  • c) Distill
  • d) None of the mentioned
Q.6
For a ternary mixture, the number of cuts required is_________
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.7
The differential distillation in order to maintain the equilibrium the process should be slow.
  • a) True
  • b) False
Q.8
Pre-cooling is required before passing the vapour to the condenser in a still.
  • a) True
  • b) False
Q.9
The equation applicable for batch distillation is _________
  • a) Frenske’s equation
  • b) Rayleigh equation
  • c) Wilke-chan equation
  • d) None of the mentioned
Q.10
Estimate the feed rate, if the composition of the more volatile component in the feed isand the residue isand the equilibrium relation is given by y*= 1.975x. Also, the rate of residue ismol/hr.
  • a) 213 mol/hr
  • b) 313 mol/hr
  • c) 413 mol/hr
  • d) 513 mol/hr
Q.11
Find the feed rate by analysing the graph,
Questionmass-transfer-questions-answers11.jpg
  • a) 153 mol/hr
  • b) 163 mol/hr
  • c) 173 mol/hr
  • d) 183 mol/hr
Q.12
Find the composited distillate composition,
  • a) 0.52
  • b) 0.62
  • c) 0.72
  • d) 0.82
Q.13
Find the value of relative volatility for a constant pressure process if
  • a) 1
  • b) 2
  • c) 2.43
  • d) Data inadequate
Q.14
Find the distillate rate, if a differential condenser is used and the equilibrium relation is given as x*= 0.2y. Also the rate of feed ismol/hr.
  • a) 12 mol/hr
  • b) 22 mol/hr
  • c) 33 mol/hr
  • d) 44 mol/hr
Q.15
Find the rate of distillate, if the composition of the more volatile component in the feed isand the residue isand the equilibrium relation is given by y*= 1.975x. Also the rate of residue ismol/hr.
  • a) 153 mol/hr
  • b) 253 mol/hr
  • c) 353 mol/hr
  • d) 453 mol/hr
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