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Mass Transfer
Mass Transfer Multiple Choice
Quiz 1
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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,
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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