ExxonMobil Test ExxonMobil Operations Knowledge 2 — Questions and Answers
Question 1: In upstream oil and gas operations, what does 'completion' refer to?
- The final processing of crude oil at a refinery
- The process of making a drilled well ready for production (Correct answer)
- Shutting down a well at the end of its life
- Finishing the pipeline connection to a wellhead
Correct answer: The process of making a drilled well ready for production
Well completion involves the activities after drilling to prepare the well for production, including casing, perforating, and installing production equipment.
Question 2: What is the purpose of gas flaring at ExxonMobil facilities?
- To generate electricity from waste gas
- To safely combust excess or waste gas that cannot be captured (Correct answer)
- To signal the location of the facility to aircraft
- To test the quality of natural gas produced
Correct answer: To safely combust excess or waste gas that cannot be captured
Flaring safely burns off excess gas that cannot be captured or processed, converting hydrocarbons to CO2 and water.
Question 3: In natural gas processing, what is a 'sweetening' unit designed to remove?
- Water vapor
- Hydrogen sulfide (H2S) and CO2 (Correct answer)
- Heavy hydrocarbons
- Nitrogen and oxygen
Correct answer: Hydrogen sulfide (H2S) and CO2
Gas sweetening removes 'sour' gas components — primarily H2S and CO2 — using amine solutions to produce 'sweet' pipeline-quality gas.
Question 4: What does 'barrel of oil equivalent' (BOE) measure?
- The volume of a standard oil barrel
- A unit standardizing different energy sources to the energy content of one barrel of crude oil (Correct answer)
- The cost of processing one barrel of crude oil
- The emissions generated from burning one barrel of oil
Correct answer: A unit standardizing different energy sources to the energy content of one barrel of crude oil
BOE is a unit of energy that allows different hydrocarbons (natural gas, LNG, oil) to be compared using the energy content of one barrel of crude oil.
Question 5: What is the primary function of a flue gas desulfurization (FGD) unit at an ExxonMobil refinery?
- To recover sulfur for sale as a byproduct
- To remove sulfur dioxide (SO2) from stack emissions (Correct answer)
- To process sour crude with high sulfur content
- To generate sulfuric acid for industrial use
Correct answer: To remove sulfur dioxide (SO2) from stack emissions
FGD units remove SO2 from combustion flue gases before they are released to the atmosphere, reducing air pollution.
Question 6: In a distributed control system (DCS) at a refinery, what is the primary role of the operator?
- To manually operate all valves and pumps on the plant floor
- To monitor process parameters and make control adjustments from a central console (Correct answer)
- To calibrate all instruments and sensors in the plant
- To generate daily production and maintenance reports
Correct answer: To monitor process parameters and make control adjustments from a central console
DCS operators monitor process variables (temperature, pressure, flow) from a central control room and adjust setpoints to maintain safe and efficient operations.
ExxonMobil Test ExxonMobil Operations Knowledge 2
In upstream oil and gas operations, what does 'completion' refer to?