CRE Awareness and Operations Practice Test

DOT 407 cargo tanks are non-pressurized highway tanks used for flammable liquids and built to carry substantial volumes. Because they’re designed for road transport, their capacities fall in the thousands of gallons, not hundreds. A typical DOT 407 tank ranges roughly from 2,000 to 7,000 gallons, which aligns with the option describing 2000–7000 gallons. Capacities around 100–500 or 500–1,000 gallons are too small for highway tankers, while 8,000–12,000 gallons would exceed the common size for this type of tank.