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

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

Question 3:

One difference between fractional distillation and simple distillation is that fractional distillation requires additional:

A - Stills B - Receivers C - Heat D - Condensers Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 4:

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

Question 5:

Top product is defined as:

A - The lighter hydrocarbon component(s) distilled from the feed B - The stream of hydrocarbons that enters the fractionation tower C - The original feed mixture with the distillate removed 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: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 6:

The feed stream to the fractionation tower should be:

A - Completely vaporized B - Partly vaporized C - Totally liquid D - None of the above Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 7:

The fractionator reflux flow rate is determined by:

A - Relative vapour pressure X reflux product flow rate B - Reflux ratio X liquid product flow rate C - Reflux ratio X overhead product flow rate D - Reflux product flow rate X relative temperature Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 8:

What determines the top temperature of a fractionator and what factor limits this temperature?

A - It is the dew point temperature of the overhead product and is limited by the amount of heating that can be accomplished by the reflux B - It is the hottest temperature in the tower and is limited by the amount of heating that can be accomplished by the reflux C - It is the hottest temperature in the tower and is limited by the amount of cooling that can be accomplished by the reflux D - It is the dew point temperature of the overhead product and is limited by the amount of cooling that can be accomplished by the reflux Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

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