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Question 10:

A sweet gas well has a high wellhead temperature of 35°C. The gas is to be transported under high pressure a distance of 50 km without the use of line heaters. The preventative hydrate control measure most suited would be:

A - Diethylene glycol injection B - Ethylene glycol injection C - Methanol injection D - Triethylene glycol injection Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct Question 1:

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 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 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: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 2:

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

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

Question 3:

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:

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

Question 5:

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

A - They are easily reactivated 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 not resistant to chemical reactions and disintegration Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 6:

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

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

Question 7:

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

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

Question 8:

A regeneration gas separator is used to:

A - Condense water from the hot regeneration gas B - Remove water from the regeneration gas stream C - Control the flow of gases according to process requirements D - Provide hot regeneration gas for drying the desiccant in the towers Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 9:

The rate of adsorption:

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

Question 10:

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

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

Question 1:

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

A - Heat is not readily available for regeneration B - Tube failure is greatly increased by decreasing the metal wall temperature 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:

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

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

Question 3:

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