Characteristics of Natural Gas Practice Test

These questions are part of the practice quiz. Start practicing

• What is the typical methane content range in pipeline natural gas?
• Which common process is used to remove acidic gas (CO2 and H2S) from natural gas?
• Which sulfur-containing species are included in total sulfur in natural gas?
• Damaged regulator station control lines can cause which pressure condition?
• What is added to natural gas when it is processed?
• Combustion is a chemical reaction that requires which 3 elements?
• How do processing plants accommodate feed gas variability to maintain product specs?
• H2S content in pipeline gas is typically described using which unit?
• How far will the gas temperature drop for every 14 psi reduction in pressure?
• Broken gas lines or other damage by construction may cause which pressure condition?
• What does a frost ball of frozen soil do to an underground pipe?
• What does sweet gas refer to in natural gas processing?
• How do engineers manage variations in gas composition along a distribution system?
• What is the ignition temperature of propane?
• What kind of soil can absorb the odorant?
• Which trio must be present for natural gas to burn?
• What method is commonly used to maintain gas spec when composition varies along the network?
• During an under pressure event, what two actions should you take?
• The gas will travel along the path of least resistance. This tendency is most influenced by which factor?
• Which statement best describes the behavior of gas when moist soil is present?
• What term describes improper odorization?
• What governs odorant addition to natural gas?
• Explain the effect of H2S on corrosion and safety in gas systems.
• Which of the following is not one of the three elements of combustion listed in the material?
• Define the Wobbe index and explain why it matters for gas appliances.
• Why are moisture content and dew points critical for natural gas in pipelines?
• What is the ideal percentage for burning gas?
• What are the three requirements for natural gas combustion?
• Does natural gas move faster or slower in a low pressure system than in a high pressure system?
• Which statement best describes the effect of reducing pressure on gas temperature as described?
• What is the typical dew point target for moisture control in pipeline gas?
• What gas has an ignition temperature of 1110 degrees Fahrenheit?
• What kind of flame indicates normal operating conditions?
• Exposed or damaged gas pipes or unsupported gas lines are considered abnormal ______ _______?
• Which soil can absorb the odorant?
• Which pairing of gas and ignition temperature is listed correctly in the material?
• Which of the following best describes the 'total sulfur' specification in natural gas?
• How is odorant concentration controlled and verified in a natural gas system?
• Lack of gas at an appliance is best described by which pressure condition?
• What kind of soil tends to permit upward gas migration?
• What is the primary factor influencing how gas travels through the ground?
• Which is more likely to ignite: a leak on a low pressure system or on a high pressure system?
• What is the role of regulators and standards bodies in natural gas quality specification?
• Which statement is true about glycol dehydration?
• Which component distinguishes natural gas from other gases?
• If you encounter an abnormal operating condition related to gas service to a customer, what two actions should you take?
• What is the purpose of differential pressure control in gas processing units?
• Which condition can cause high pilots on stoves and other equipment?
• What is hydrocarbon dew point and why is it important in gas transport?
• What two steps should be followed if an overpressure event occurs?
• Which statement describes the combustion components?
• The ethane content of natural gas is approximately which percentage?
• What are the four steps to take when a high level of gas is detected in a building?
• What is the role of glycol dehydration in natural gas processing?
• Why might standards specify limits on impurities in natural gas?
• What happens to water removed during dehydration before it is sent to refining or sale?
• What is the energy content of one scf in kilowatt-hours?
• The explosive range of natural gas is ____% - ____% of gas in the air.
• What percentage of methane is natural gas composed of?
• What do scf and Nm3 express in gas measurement?
• What is a typical H2S limit in many pipeline gas specifications?
• What gas has an ignition temperature of 84 degrees Fahrenheit?
• What effect does moist soil have on natural gas migration?
• Explain the purpose of drying gas to a target dew point before pipeline transmission.
• Which statement about natural gas composition is false?
• Approximately how much energy does one standard cubic foot (scf) of natural gas contain?
• Why is composition analysis critical for regulatory compliance in gas pipelines?
• Name the two primary acid gas contaminants in natural gas and one safety concern for each.
• Which statement best describes the most common indication of a natural gas leak?
• What is the first action recommended when a high level of gas is detected in a building?
• What is the purpose of a gas quality specification in the natural gas industry?
• What kind of pressure can damaged control lines at regulator stations cause?
• What happens when natural gas is cooled to hydrocarbon dew point?
• What is a hydrocarbon dew point and how is it measured?
• Gas can migrate through sewers and underground duct lines. This implies what about leakage safety?
• What does sweetening a natural gas stream entail?
• What is the ignition temperature of natural gas?
• A release of gas with no odor detected indicates which condition?
• How does the presence of heavier hydrocarbons affect hydrocarbon dew point?
• Propane and heavier hydrocarbons make up approximately what percentage of natural gas?
• If the pilot flame is unusually high due to pressure issues, what is the likely cause?
• What is the primary reason for verifying odorant strength in natural gas systems?
• Which glycol is commonly used in glycol dehydration systems for natural gas?
• What effect does frozen soil have on gas migration?
• Exposed or damaged gas pipes or unsupported gas lines are considered abnormal ______ ______?
• Which soil condition would cause gas to accumulate underground rather than rise?
• What is the ignition temperature of butane?
• The most common indication of a gas leak is which of the following?
• What standard conditions are commonly used for measuring natural gas volumes?
• Gasoline, kerosene, and fuel oil have an ignition temperature of what?
• Which operations are typically adjusted in a gas processing train to meet final product specifications?
• How does the presence of CO2 in natural gas influence the dew point and the Wobbe index?
• Which soil type would allow gas to move freely?
• What percentage of propane and heavier hydrocarbons does natural gas contain?
• Which three substances have an ignition temperature of 490 degrees Fahrenheit?
• Distinguish between sweet gas and sour gas.
• Which of the following is NOT a characteristic of natural gas?
• Which of the following is NOT one of the four steps to take when a high level of gas is detected in a building?
• Which statement about the density of natural gas relative to air is true?
• What increases when gas is compressed?
• In an overpressure event, what is the first recommended action?
• Differentiate between Higher Heating Value (HHV) and Lower Heating Value (LHV) for natural gas.
• Which component is present in natural gas in the largest percentage by volume?
• How is H2S content in pipeline gas typically described and controlled?
• Which statement is true about ignition temperatures given in the material?
• How water dew point and hydrocarbon dew point differ conceptually?
• Mercaptan is which of the following?
• What is the primary constituent of pipeline natural gas and its typical share by volume?
• Natural Gas will only burn with the right mix of what two things?
• Why does inert gas like nitrogen reduce the energy content of natural gas?
• What impurity reduces heating value and increases corrosion risk?
• Why can't combustion occur when there is more than 15% natural gas in the air?
• Which flame color best indicates proper combustion?
• To respond to an abnormal operating condition related to a customer's gas service, which two actions are required?
• What safety benefit does mercaptan provide in natural gas?
• What factor plays a big role in the way gas travels through the subsurface?
• What is 'gas quality monitoring' and why is it essential?
• Which heating value includes the latent heat of condensation?
• What gas has an ignition temperature of 806 degrees Fahrenheit?
• Which factor is affected by odorant concentration in natural gas?
• Natural gas will follow which path?
• Why is a dew point specification important for downstream distribution?
• What determines the Wobbe index?
• What is the overall impact of moisture removal on hydrates and corrosion risk in natural gas pipelines?
• Combustion is a chemical reaction between ____________ and a ________________________?
• Which factor primarily promotes water condensation in natural gas?
• Which range defines the explosive mixture for natural gas in air?
• What kind of soil tends to allow the gas to migrate freely in an upward manner?
• What happens to natural gas when cooled?
• What is the typical relative density (specific gravity) of natural gas relative to air, and why is it important?
• A high pilot flame is an indication of which pressure condition?
• What processing unit is typically used to remove water from natural gas?
• How does increasing methane fraction influence heating value per volume?
• Which term describes the situation where there is no odor due to masking and that needs reporting?
• Which statement about amine treating in natural gas processing is correct?
• What can happen to soil if gas falls below 32 degrees Fahrenheit?
• Which condition can cause gas lines to rupture?
• What color flame indicates normal gas combustion?
• What condition causes lack of gas at an appliance?
• What is the approximate percentage of ethane in natural gas?
• How does the gas composition affect the Wobbe index and appliance compatibility?
• How does the relative density of gas affect leak detection and safety in pipelines?
• If soil is frozen, what is the effect on gas migration?
• Which of the following is NOT a component required for combustion?
• Which statement about Wobbe index is true?
• Where will propane, gasoline, and fuel oil settle after a ground-level release?
• List two common impurities that pipeline operators control in natural gas.
• Which elements are required for combustion according to the material?
• Which two quality parameters are typically used to specify pipeline natural gas?
• How does H2S content influence corrosion protection strategies in gas pipelines?
• Can gas migrate sideways? If so, through what?
• What happens to natural gas when heated?
• What do pipeline heaters do before reducing pressure? Why?
• Where should fire extinguishers be positioned for effective use?
• Steady blue flames indicate which condition?
• What is the typical nitrogen content in natural gas?
• No gas odor is present due to pipeline masking. What term completes the sentence?
• What is a common method to measure H2S in natural gas?
• What is the typical methane share by volume in pipeline natural gas?
• Wobbe index is defined as HHV divided by the square root of SG. Why is it used in natural gas systems?
• Which gas is the main component of natural gas?
• Which soil type allows natural gas to move freely?
• What is removed from natural gas when it is processed?
• How is hydrogen sulfide removed from natural gas in processing plants?
• What is odorization and why is it applied to natural gas?
• What happens to the possibility of combustion when natural gas concentration exceeds 15% in air?
• How do pressure and temperature influence dew points in natural gas?
• Does a gas leak always stay near its source? If not, how does it travel?
• How does natural gas flow?
• If gas is heated, what happens to its volume when pressure is held constant?
• Which statement about compression of natural gas is true?
• How do impurities like CO2 and N2 affect burner operation?
• In natural gas measurement, what does scf stand for?
• Which unit is commonly used to express natural gas volumes?
• The main component of natural gas is _________.
• Why is nitrogen often present in natural gas and what is its effect on energy content?
• What does Nm3 stand for in gas measurement?
• When natural gas is released into the atmosphere, what does it do?
• What 3 things must be present for combustion to occur?