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In addition to dehydrating gas dry desiccants can be used to:

A - Remove heavier hydrocarbons from a gas stream B - Sweeten and remove water from liquid hydrocarbons C - Remove mercaptan sulphur from a gas stream D - All of the above Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 4:

When compared to a glycol dehydration system, a solid desiccant unit:

A - Is a much simpler operation because it uses two or more towers B - Cannot handle gases at higher temperatures C - Can handle gases at higher temperatures D - Has a much lower initial cost Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 5:

During the operation of solid desiccant systems the presence of sulphide gases in the stream is bound to enhance the formation of carbonyl sulphide if:

A - Activated bauxite adsorbents are used B - Aluminum based adsorbents are used C - Ferrous oxide based adsorbents are used D - Silica based adsorbents are used Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 6:

Adsorption refers to the affect that natural forces have on the sufrace of a solid, intending to capture and hold vapours and liquids on its surface.

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

Question 7:

During the adsorption cycle of a solid desiccant system:

A - The gas is passed through a heat exchanger where it is cooled to condense the water removed B - The wet inlet gas flows downward through the tower where all the adsorbable gas components are adsorbed at different rates C - The wet gas is sent through a salt bath type heater and then piped to the tower D - The inlet gas flows upward through the tower where all the adsorbable gas components are adsorbed at similar rates Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 8:

The rate of adsorption:

A - Increases as pressure decreases B - Decreases as temperature increases C - Increases as temperature increases D - Increases as pressure increases Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 9:

The essential components of a solid desiccant dehydrator installation does not include:

A - Two or more adsorption towers B - An inlet gas stream separator C - A regeneration gas cooler D - A reboiler Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 10:

You observe the sudden failure of a bed in a solid desiccant system. The gas velocity through the pipe was recorded as normal and there were no abnormal pressure spikes. The most likely reason for the sudden failure would be:

A - Corrosion in the pipe B - A slug of free water C - Hydrogen sulphide in the gas D - Crushed desiccant Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct

Question 1:

One disadvantage of using a high temperature salt bath in a dry desiccant dehydration unit is that the:

A - Tube failure is greatly increased by decreasing the metal wall temperature B - Heat is not readily available for regeneration C - High-temperature bath varies widely in temperature D - Salt bath heater is more costly than a direct-fired tubular heater. Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 2:

The depth of the desiccant bed from saturation to initial adsorption is known as the:

A - Regeneration zone B - Adsorption zone C - Wet gas zone D - Mass-transfer zone Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 3:

Which of the following statements in regard to dry desiccants is false?

A - They are not resistant to chemical reactions and disintegration B - Their capacity is greatly affected by gas pressure C - They cannot suffer from poisoning if the gas contains a high percentage of acid gas D - They are easily reactivated Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 4:

During the adsorption cycle of a solid desiccant system:

A - The wet gas is sent through a salt bath type heater and then piped to the tower B - The wet inlet gas flows downward through the tower where all the adsorbable gas components are adsorbed at different rates C - The inlet gas flows upward through the tower where all the adsorbable gas components are adsorbed at similar rates D - The gas is passed through a heat exchanger where it is cooled to condense the water removed Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 5:

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