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In the fractionation tower, the top temperature is:

A - The highest temperature in the tower B - Controlled to maintain the quality of the bottom product C - The lowest temperature in the tower D - None of the above Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 8:

Why is it impossible to produce a 100% pure product using fractional distillation?

A - The more trays the fractionator contains, the lower the purity of the overhead product B - Because the vaporization and condensing actions on the trays are not 100% effective. C - Because the process uses heat repeatedly on each tray, diminishing the purity of the overhead product D - Because each time the vapours rise in the tower, the purity is decreased through condensation Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 9:

Feed is defined as:

A - The condensed product that is returned to the still to assist in making a more complete separation into the desired fractions B - The lighter hydrocarbon component(s) distilled from the feed C - The original feed mixture with the distillate removed D - The stream of hydrocarbons that enters the fractionation tower Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 10:

In a distillation process, the Initial Boiling Point (ibp) is defined as the temperature of the liquid when:

A - The first drop of distillate condenses into the receiver B - The first evidence of steam can be observed C - Partial vaporization of the desired component is achieved D - The last drop of liquid boils and distils into the receiver Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A

Question 1:

Top product is defined as:

A - The stream of hydrocarbons that enters the fractionation tower B - The original feed mixture with the distillate removed C - The lighter hydrocarbon component(s) distilled from the feed D - The condensed product that is returned to the still to assist in making a more complete separation into the desired fractions Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 2:

Reflux is defined as:

A - The stream of hydrocarbons that enters the fractionation tower B - The lighter hydrocarbon component(s) distilled from the feed C - The condensed product that is returned to the still to assist in making a more complete separation into the desired fractions D - The original feed mixture with the distillate removed Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 3:

Why is a simple distillation process not appropriate for the separation of various hydrocarbons contained in a Liquefied Petroleum Gas stream?

A - Because each component of the stream has its own boiling point and vapour pressure B - Because all components of the stream have the same boiling point C - Because the LPG is already a gas and cannot be treated by distillation D - Because components with lower boiling points and higher vapour pressures are the last to distill Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 4:

The top temperature of a fractionator is the temperature of the vapour above the top tray.

A - True B - False Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 5:

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