If you were asked to design a fractionation system for a stream where the mixture consists of c3, c4, and c5, how many towers would your system contain?

A - 1 B - 2 C - 3 D – 4

Correct Answer(s): B Marked as: Incorrect _______________________________________________

Question 4:

You are working in a sour gas plant and one of the products created there is propane for commercial sale. Lab testing has come back on the propane and it indicates a higher than acceptable level of ethane in your propane product. What is the most likely cause of the contamination?

A - The de-ethanizer is being operated at too low a temperature B - The H2S scrubber is malfunctioning C - The depropanizer is being operated at too high a temperature D - The debutanizer is being operated at too low a temperature Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 5:

With a mixture of C3, C4, and C5 in a two tower fractionation system, the overhead product of the depropanizer (first tower) is:

A - C5 B - C3 C - C4 D - C4 and C5

Correct Answer(s): B Marked as: Incorrect _______________________________________________

Question 6:

In a fractionating system used in a large sour gas plant, when a mixture of propane and butane is split in the depropanizer, the overhead product is:

A - Butane B - Pentane C - Ethane D - Propane Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 7:

In the following illustration, what is produced as top product from the lean oil fractionator?

A - Pentane-plus B - Octane C - Propane D - Ethane Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 8:

Depending on the purity requirements of the product, a de- isobutanizer can contain up to:

A - 100 trays B - 65 trays C - 95 trays D - 75 trays Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 9:

In a gas plant, when discussing fractionation components, the common abbreviation used for octane is:

A - C8 B - C4 C - C3 D - C1 Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 10:

When a system is designed to separate the components of a four-component mixture:

A - Three towers are required B - One tower is required C - Two towers are required D - Four towers are required Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Question 1:

In the illustration, which is produced as bottom product from the debutanizer?

A - Butane B - Propane, butane, sulphur C - Pentane and octane D - Propane and butane Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 2:

In a fractionating system used in a large sour gas plant, when a mixture of propane and butane is split in the depropanizer, the overhead product is:

A - Propane B - Pentane C - Butane D - Ethane Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 3:

The de-isobutanizer is employed in a few installations to split isobutane (i-C4) from normal butane (n-C4) and requires very close pressure and temperature control. The tower is controlled by maintaining a temperature differential of _________ from the top to the bottom of the tower.

A - 2 to 4 degrees C B - 4 to 6 degrees C C - 6 to 8 degrees C D - 8 to 10 degrees C Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 4:

With a mixture of C3, C4, and C5 in a two tower fractionation system, the overhead product of the depropanizer (first tower) is:

A - C4 B - C4 and C5 C - C3 D - C5 Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 5:

You are working in a sour gas plant and one of the products created there is propane for commercial sale. Lab testing has come back on the propane and it indicates a higher than acceptable level of ethane in your propane product. What is the most likely cause of the contamination?

A - The H2S scrubber is malfunctioning B - The debutanizer is being operated at too low a temperature C - The depropanizer is being operated at too high a temperature D - The de-ethanizer is being operated at too low a temperature Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 6:

Fractionators are named by:

A - The heaviest bottom product B - The lightest bottom product C - The heaviest overhead component D - The lightest overhead component Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 7:

In a gas plant, when discussing fractionation components, the common abbreviation used for octane is:

A - C8 B - C4 C - C3 D - C1 Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 8:

Depending on the purity requirements of the product, a de- isobutanizer can contain up to:

A - 75 trays B - 100 trays C - 95 trays D - 65 trays Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 9:

In a gas plant, when discussing fractionation components, the common abbreviation used for propane is:

A - C8 B - C4 C - C3 D - C1 Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 10:

The de- isobutanizer tower is controlled by maintaining a temperature differential from the top to the bottom of the tower of:

A - 4 to 7 degrees C B - 5 to 9 degrees C C - 1 to 3 degrees C D - 4 to 6 degrees C Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct

Question 1:

The component used with a fractionation tower that provides reflux to the tower is called the:

A - Reflux pump B - Bottom heat exchanger C - Reboiler D - Overhead condenser Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 2:

Which type of heating equipment used in a fractionation system uses only convection to produce circulation?

A - Fired heater reboiler B - Assisted thermal siphon reboiler C - Thermal siphon reboiler D - Fractionator feed heater Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 3:

The component labeled "F" on the illustration of the horizontal fired heater shown is called the:

A - Firebox B - Burner C - Convection tubes D - Breeching Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 4:

If a fractionator is used to condense LPG and heavier products, the type of condenser used is a:

A - Reflux accumulator B - Total condenser C - Fin fan cooler D - Water-cooled condenser Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 5:

If the fractionator bottom temperature is too hot:

A - The reflux accumulator must be shut down B - Some of the overhead product will condense out in the bottom product C - The tower temperature must be adjusted by changing the reflux flow D - Some of the bottom product will be driven overhead Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 6:

A fractionator feed heater is a:

A - Accumulator B - Condenser C - Reboiler D - Heat exchanger Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 7:

The component used with a fractionation tower that provides a volume of overhead condensed liquid to the tower is called the:

A - Reboiler B - Reflux accumulator C - Bottom heat exchanger D - Overhead condenser Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 8:

The component labeled "B" on the illustration of the horizontal fired heater shown is called the:

A - Breeching B - Refractory lining C - Stack D - Radiant tubes Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 9:

In a fin fan cooler, air is forced across the tubes by:

A - Convection B - Fans C - Compressors D - Atmospheric pressure Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 10:

In a thermal siphon reboiler, the bottom product flows to the bottom of the reboiler by using:

A - Convection B - Induction C - Gravity D - Centrifugal force Correct Answer(s): C

Question 1:

When the overhead product contains light ends having a high vapour pressure, the gases will not be condensed but will need to be pressure-controlled from the:

A - Bottom heat exchanger B - Overhead condenser C - Reboiler D - Reflux accumulator Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 2:

The reflux accumulator, or reflux drum, is part of the condensing equipment. The accumulator pressure corresponds to the bubble point pressure of the liquid at its temperature in the vessel.

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

Question 3: