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In a refluxed stabilizer when the vapour pressure of the natural gasoline gets too high:

A - The setpoint of the stabilizer bottom temperature controller is raised to increase the fuel to the heater B - The setpoint of the stabilizer bottom temperature controller is lowered to decrease the fuel to the heater C - The setpoint of the stabilizer feed drum pressure controller is raised to increase the pressure in the drum D - The setpoint of the stabilizer reflux accumulator level controller is raised to increase the reflux rate to the tower Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 5:

The emergency shutdown valve provided in the fuel gas line and the pilot of a fired heater may be activated to shut down by all the following conditions except:

A - Low fuel gas pressure to pilot B - High heater outlet temperature C - Loss of flame D - Low stack temperature Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 6:

To detect the presence of free sulphur in gasoline, plant laboratory personnel conduct a:

A - Specific gravity test B - Dryness test C - Reid vapour pressure test D - Copper strip test Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 7:

The bottom temperature in a condensate stabilizer is kept close to:

A - 150 degrees C B - 300 degrees C C - 200 degrees C D - 400 degrees C Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 8:

The purpose of grounding condensate transport trucks is:

A - Enables loading pumps to run B - Elimination of static electricity C - Provides truckers indication of tank level D - Informs Control Centre of loading operations Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 9:

Salts present in the raw condensate may be removed by:

A - Increasing the amount of heat in the stabilizer reboiler B - Filtration of the inlet condensate C - Injecting a water/chemical mixture into the condensate prior to the stabilizer tower D - Injecting a water/chemical mixture into the condensate prior to the stabilizer feed drum Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 10:

Excessive concentrations of heat at the tube fins in a fired heater may cause:

A - Internal coking and weak spots B - Liquid surging C - Hydrate formation D - External coking and weak spots Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct

Question 1:

When discussing the glycols used in gas dehydration, ethylene glycol (EG) is not:

A - The most hygroscopic of the glycols used in dehydration B - Used where greater amounts of dew point depression are required C - Prone to higher vapour losses than diethylene glycol (DEG) D - The least expensive of the glycols used in dehydration Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 2:

In the glycol dehydration plant the lean glycol solution flows downward concurrent to the wet gas stream in the:

A - Still column B - Accumulator C - Contactor D - Reboiler Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 3:

In the regeneration section of the TEG plant, the reboiler temperature requirements are:

A - The same as in a DEG plant B - Dependent on the design limits of the reflux equipment C - Higher than in a DEG plant D - Lower than in a DEG plant Correctness Rule: Single Correct Answer Required Answer(s) Given: C Correct Answer(s): C Marked as: Correct _______________________________________________

Question 4:

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

Question 5:

The possibility of glycol decomposition in a regeneration system occurs above:

A - 100°C B - 55°C C - 135°C D - 205°C Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 6:

Preventive dehydration controls the moisture content in gas by injecting certain inhibitors or chemicals. One drawback of ammonia inhibitors is that they:

A - Combine with the carbon dioxide in the gas, forming ammonium carbamate B - Promote hydrate formation at high pressures C - Combine with the carbon dioxide in the gas, forming ammonium chloride D - Mixes with the hydrogen sulphate in the gas to create ammonium sulphate Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

Question 7:

Since water and TEG have widely varying boiling points, the two liquids can be separated easily by:

A - Using an open pot to drive off the water as steam B - Fractional distillation C - Simple distillation D - Chemical separation Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 8:

An operator wishes to increase the dew point depression from 30°C to 36°C on a plant's TEG dehydration unit. The action required to reach this is:

A - Increase circulation of glycol B - Increase reboiler temperature C - Decrease gas flow rate D - Reduce operating pressure in absorber Correctness Rule: Single Correct Answer Required Answer(s) Given: B Correct Answer(s): B Marked as: Correct _______________________________________________

Question 9:

In the regeneration section of a TEG plant the solution is heated in a coil immersed in the glycol surge tank and then discharged into the:

A - Absorber B - Flash drum C - Pump suction D - Still column Correctness Rule: Single Correct Answer Required Answer(s) Given: D Correct Answer(s): D Marked as: Correct _______________________________________________

Question 10:

Dewpoint depressions of 72°C to 78°C are possible with glycol dehydrators using TEG and the high concentration glycol regenerators.

A - True B - False Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct Question 1:

In a glycol dehydration plant the absorbed gases are removed from the solution minimizing the danger of glycol oxidation and corrosive tendencies in the:

A - Flash drum B - Surge tank C - Incinerator D - Accumulator Correctness Rule: Single Correct Answer Required Answer(s) Given: A Correct Answer(s): A Marked as: Correct _______________________________________________

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