Evaluation


Please answer the following questions without referring to the tutorial pages. This will allow a more accurate evaluation of the effectiveness of this web site.


Please enter second code given on sheet

Question 1:
Infinite number of stages are necessary at:
Minimum reflux
Total reflux
Total condenser
Partial reboiler
Saturated feed

Question 2:
When the feed is saturated vapor, the slope of the q-line is:
1
0
infinity
45 degrees
1 or infinity

Question 3:
Based on the following diagram, the column is at:

min/max Maximum reflux
Constant temperature
Maximum height
Minimum height
Minimum pressure

Question 4:
The portion of the distillation column above the feed is the:
Stripping section
Distilling section
Rectifying section
Temperate section
Rising section

Question 5:
No separation will occur if the constant relative volatility is:
0
1
infinity
above 90
negative

Question 6:
The upper operating line intersects the y-axis at:
(D*xD)/V
L/V
q/(q-1)
V/L
(V*xD)/L

Question 7:
Based on the following diagram, the optimum feed plate location is:

feed-plate 1
2
3
4
unknown

Question 8:
A partial reboiler can be used to produce two overhead products:
True
False

Question 9:
The light key is the:
Lightest of the light products
Lightest of the top products
Lightest of the heavy products
Heaviest of the heavy products
Heaviest of the light products

Question 10:
The xy-Diagram depicts:
Mole fractions of a component (A) in the vapor and liquid phases at equilibrium at constant pressure.
Mole fractions of a component (A) in the vapor and liquid phases at equilibrium at constant temperature.
Mole fractions of a component (A) in the vapor and liquid phases on the various trays of the column.
Mole fractions of the two components in the binary mixture (A and B) in the liquid phase at constant (column) pressure.
Mole fractions of the two components in the binary mixture (A and B) in the vapor phase at constant (column) pressure.

Question 11:
Based on the following diagram, the feed is:

proced Saturated liquid
Saturated vapor
Super saturated
Subcooled liquid
Superheated vapor

Question 12:
Generally, it is easier to separate a binary system with a _____________ relative volatility.
Higher
Lower
Similar
Closer
Wide

Question 13:
A column is designed for a hexane-heptane separation. The heavy key is:
Hexane
Heptane
Neither is the heavy key
Either can be the heavy key
Key components cannot be specified for binary distillation, only for multicomponent distillation

Question 14:
The portion of the distillation column below the feed is the:
Rectifying section
Distilling section
Stripping section
Temperate section
Rising section

Question 15:
Based on the following diagram, and an overall efficiency of 85%, how many real stages are needed (theoretical number rounded):

feed-plate 2
3
5
8
9

Question 16:
The following equation represents the:

equation Upper operating line
Lower operating line
Feed line
Rectifying section operating line
Reboiler duty

Question 17:
The McCabe-Thiele Method is valid for ____________ distillation.
Fractional
Flash
Batch
Constant
Free

Question 18:
A system is found to have a minimum reflux ratio of 0.76. Based on the information given in this tutorial, what is a reasonable actual reboiler rate?
1.06
1.14
0.38
1.76
0.85

Question 19:
The composition of the product from the stripping section is represented on the McCabe-Thiele Diagram as:
xB
xS
xV
xT
xD

Question 20:
Although physically attainable, this condition produces no product:
Minimum reflux
Total reflux
Constant temperature
Total reboiler
Saturated feed