If corrosion inhibitors are injected upstream of a molecular sieve system:

A - A coalescer and/or a layer of activated carbon on the inlet end of the bed should be installed B - The kind of product components that can be adsorbed will be altered C - The bed must be thoroughly regenerated and purged with nitrogen before treating D - A filter should be added on the feed inlet line Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 8:

To prevent the loss of molecular sieve during an upset condition, inlet and outlet nozzles should be covered with:

A - Baffle plates or equivalent distributors B - Deflectors C - A coarse screen D - A fine screen Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 9:

One disadvantage of a molecular sieve hydrocarbon treating system is that:

A - These systems can only handle small streams of hydrocarbons B - Difficulty in disposing of sour regeneration gas may occur C - The molecular sieve material is corrosive D - Its capacity is affected by pressure variations Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 10:

During the molecular sieve treating cycle, the feed pressure must be high enough to:

A - Maintain the flow in the gas phase B - Maintain the flow in the liquid phase C - Allow sweet, ambient temperature fuel gas to flow through the bed D - Regenerate the bed Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct

Question 1:

Adsorption occurs only on the surface of a:

A - Molecular sieve B - Nonpolar paraffin C - Liquid D - Solid E - a and d Correctness Rule: Single Correct Answer Required Answer(s) Given: E Correct Answer(s): E Marked as: Correct _______________________________________________

Question 2:

Of the following, the compound that is most effectively adsorbed by a molecular sieve is:

A - Heavy mercaptans B - Light mercaptans C - Carbonyl sulphide D - Hydrogen sulphide Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 3:

During the molecular sieve cool and fill cycle, when the treating direction is downflow, the entire vessel must be filled with liquid prior to switching in order to drive all gas from void spaces to ensure that:

A - No channelling occurs from two-phase flow B - The adsorber repressurizes to the incoming product pressure C - The temperature of the regeneration gas is controlled D - Product contamination with the regeneration medium does not occur Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 4:

The adsorbing capacity of a molecular sieve depends on the:

A - Contaminants in the mixture B - Pressure variation C - Vessel fluid flow rate D - Kind and amounts of components to be adsorbed Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 5:

One advantage of a molecular sieve hydrocarbon treating system is that:

A - High temperature gas regeneration is required B - Molecular sieve degradation does not occur when corrosion inhibitors are present C - Removal of all polar compounds is achieved in a series of simple steps D - The regeneration process is simple Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 6:

To prevent the loss of molecular sieve during an upset condition, inlet and outlet nozzles should be covered with:

A - Deflectors B - A coarse screen C - A fine screen D - Baffle plates or equivalent distributors Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 7:

Which phase of the molecular sieve operating cycle occurs after the bed has been cooled and the bed is brought up to operating condition by applying product from the storage vessel?

A - Treating B - Cool and fill C - Regeneration D - Repressurize Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 8:

One disadvantage of a molecular sieve hydrocarbon treating system is that:

A - These systems can only handle small streams of hydrocarbons B - The molecular sieve is corrosive C - Their capacity is affected by pressure variations D - Molecular sieve degradation occurs when corrosion inhibitors are present Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 9:

Which phase of the molecular sieve operating cycle occurs when adsorption capacity is exhausted and beds are switched so that the exhausted bed is taken off treating?

A - Regeneration B - Repressurize C - Drain D - Cool and fill Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 10:

During the molecular sieve regeneration cycle, sweet fuel gas is circulated through the adsorber at moderate pressure. This gas is heated in the regeneration gas heater to temperatures ranging from:

A - 225 - 260°C B - 260 - 315°C C - 240 - 275°C D - 360 - 415°C Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct

Question 1:

To prevent the loss of molecular sieve during an upset condition, inlet and outlet nozzles should be covered with:

A - Baffle plates or equivalent distributors B - A fine screen C - A coarse screen D - Deflectors Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): B Marked as: Incorrect _______________________________________________

Question 2:

One disadvantage of a molecular sieve hydrocarbon treating system is that:

A - Product loss occurs when the beds are drained, depressured, or regenerated with hot gas B - Its capacity is affected by pressure variations C - Removal of all polar compounds is achieved in a series of simple steps D - The molecular sieve material is corrosive Correct Answer(s): A Marked as: Incorrect _______________________________________________

Question 3:

One advantage of a molecular sieve hydrocarbon treating system is that:

A - Product loss does not occur when the beds are drained B - Molecular sieve degradation does not occur when corrosion inhibitors are present. C - Removal of all polar compounds is achieved in one step D - High temperature gas regeneration is required Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 4:

During the molecular sieve regeneration cycle, sweet fuel gas is circulated through the adsorber at moderate pressure. This gas is heated in the regeneration gas heater to temperatures ranging from:

A - 260 - 315°C B - 225 - 260°C C - 360 - 415°C D - 240 - 275°C Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 5:

Of the following, the compound that is most effectively adsorbed by a molecular sieve is:

A - Carbonyl sulphide B - Heavy mercaptans C - Light mercaptans D - Hydrogen sulphide Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 6:

A molecular sieve vessel has exhausted the catalysts inside. The catalysts will be shipped away to be re-conditioned. You are in charge of removing the catalyst and preparing it for shipping. What safety issues are going to be most important during the process?

A - Wearing of breathing apparatus B - Wearing of protective clothing C - The catalyst catching fire D - a & b E - b & c Correctness Rule: Single Correct Answer Required Answer(s) Given: E Correct Answer(s): E Marked as: Correct _______________________________________________

Question 7:

During the molecular sieve treating cycle, the feed pressure must be high enough to:

A - Regenerate the bed B - Allow sweet, ambient temperature fuel gas to flow through the bed C - Maintain the flow in the liquid phase D - Maintain the flow in the gas phase Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 8:

One advantage of a molecular sieve hydrocarbon treating system is that:

A - Removal of all polar compounds is achieved in a series of simple steps B - High temperature gas regeneration is required C - The regeneration process is simple D - Molecular sieve degradation does not occur when corrosion inhibitors are present Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 9:

One advantage of a molecular sieve hydrocarbon treating system is that:

A - Molecular sieve degradation does not occur when corrosion inhibitors are present B - Removal of all polar compounds is achieved in a series of simple steps C - Its capacity is not affected by pressure variations D - High temperature gas regeneration is required Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 10:

During the molecular sieve cool and fill cycle, when the treating direction is downflow, the entire vessel must be filled with liquid prior to switching in order to drive all gas from void spaces to ensure that:

A - No channelling occurs from two-phase flow B - The temperature of the regeneration gas is controlled C - The adsorber repressurizes to the incoming product pressure D - Product contamination with the regeneration medium does not occur Correct Answer(s): A Marked as: Incorrect

Question 1:

Which phase of the molecular sieve operating cycle occurs after the bed has been cooled and the bed is brought up to operating condition by applying product from the storage vessel?

A - Regeneration B - Repressurize C - Treating D - Cool and fill Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 2:

Of the following, the compound that is most effectively adsorbed by a molecular sieve is:

A - Carbonyl sulphide B - Hydrogen sulphide C - Light mercaptans D - Heavy mercaptans Correct Answer(s): C Marked as: Incorrect _______________________________________________

Question 3: