Which statement about fuels in acquired live burn structures is true?

• A. Diesel fuel is permissible
• B. Propane is permissible
• C. Natural gas is permissible
• D. None of these are correct

Answer: (D)

The situation tests fuel control and safety in acquired live-fire evolutions. In these setups, fuels must come from a purpose-built, training-approved system that is designed for controlled ignition, monitoring, and shutdown. Portable fuels such as diesel, propane, or natural gas stored in cylinders or containers present hazards—uncontrolled flame spread, toxic smoke, vapor buildup, and spills—that are difficult to manage inside an acquired structure. Because of these safety concerns, none of those common fuels are permitted in acquired live burn structures, making the statement that none of them are correct the right choice. In practice, instructors rely on the facility’s approved, built-in gas-fired training system rather than bringing in individual fuel sources.