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This quiz contains multiple-choice problems on process design and optimization, minimum stages and reflux, reflux stage relationships, existing column analysis with the Smith-Brinkley method, Smokers equation, Jeffrey, Douglas and McAvoy equations.
Energy balance optimization is a prime factor for setting
Tray efficiency depends correspondingly upon
Column diameter
Column throughput
Column length
Column feed
When a minor fraction of liquid flows to the tray below through the tray perforations, it is called
Weeping
Dumping
Entrainment
Feeding
When distillate contains highest possibility of light key, D/F approaches
Infinity
Zero
Unity
Double
At higher recovery, __ distillate is produced.
Low
More
Finite
Unwanted
The vertical D/F line indicates the
Maximum impurity level
Minimum impurity level
More separation
Less separation
Material balance optimization is also referred to as
L-V optimization
B-D optimization
D-B optimization
V-L optimization
Raising the column pressure results in
Lower relative volatility
Higher relative volatility
No effect
Higher boiling point
What does DCF represents?
Distillation corp factor
Damping correction factor
Down comer flow
Discounted cash flow
What does RVP stand for?
Reid vapour pressure
Reflux vapour pressure
Reid viscous Parameter
Right vary parameter
The number of theoretical stages depends on the
Stepping off the tray
Reflux ratio
Operating line
Flow rates
If x = 0.4, y = 0.6633 and point xD (0.9, 0.9), estimate R{min}.
0.9
0.4734
0.4
0.66
When R is infinite, the rectifying slope becomes
0
1
0.5
Cannot be specified
If distillate is 95%, withdrawal is four and α = 2.5, estimate the total number of trays.
7.7
10
6.7
5.7
To calculate the number of stages for non-ideal cases, we use
Point efficiency
Murphree efficiency
Tray efficiency
Overall efficiency
