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In a solid desiccant dehydration system that uses two or more towers:

A - All the towers will be on the drying cycle at all times B - One tower will be on the drying cycle at all times C - The towers will be on the adsorbing cycle one at a time D - All towers will be on the adsorbing cycle at all times Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 6:

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

Question 7:

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

A - Is adaptable to plants handling extremely wet gas B - Cannot handle gases at higher temperatures C - Has a much lower initial investment D - Is unadaptable to load changes Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 8:

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

Question 9:

The rate of adsorption:

A - Decreases as temperature increases B - Increases as pressure decreases C - Increases as pressure increases D - Increases as temperature increases Correct Answer(s): A Marked as: Incorrect _______________________________________________

Question 10:

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

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

Question 1:

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

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

Question 2:

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

A - Has a much lower initial investment B - Is adaptable to plants handling extremely wet gas C - Is unadaptable to load changes D - Cannot handle gases at higher temperatures Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 3:

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

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

Question 4:

During the adsorption cycle of a solid desiccant system:

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

Question 5:

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

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

Question 6:

Regeneration gas is:

A - Gas containing water vapour prior to flowing through the adsorber towers B - Gas that has been dehydrated by flowing through the adsorber towers C - Dry gas that has been heated in the regeneration gas heater D - Wet gas that has been heated in the regeneration gas heater Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 7:

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