Which unit is used to measure gas quantities in the example?

Which unit is used to measure gas quantities in the example?

• A. liters
• B. gallons
• C. cubic feet
• D. barrels

Answer: (C)

Gas quantities are expressed by volume, and for many practical applications in US practice the standard unit is cubic feet. This reflects that gases fill the volume of a container or a pipeline, so the amount of gas is described by how much space it occupies. Liters and gallons are typically used for liquids, and barrels are common for oil products, not gaseous quantities. If the example uses US customary practice, cubic feet makes the most sense, and you might also encounter standard cubic feet (SCF) to specify gas at standard temperature and pressure, or cubic feet per hour when talking about flow rate.

Gas quantities are expressed by volume, and for many practical applications in US practice the standard unit is cubic feet. This reflects that gases fill the volume of a container or a pipeline, so the amount of gas is described by how much space it occupies. Liters and gallons are typically used for liquids, and barrels are common for oil products, not gaseous quantities. If the example uses US customary practice, cubic feet makes the most sense, and you might also encounter standard cubic feet (SCF) to specify gas at standard temperature and pressure, or cubic feet per hour when talking about flow rate.