Which factor makes bomber aircraft high hazard?

• A. Low fuel capacity
• B. Single engine operation
• C. No crew members
• D. Large fuel quantities and high explosives stored internally or externally

Answer: (D)

The main concept is the overall hazard potential created by both large fuel loads and stored explosives on a bomber aircraft. When an aircraft carries substantial quantities of fuel, fires can spread rapidly, reach extremely high heat, and overwhelm firefighting capabilities. If the aircraft also contains internal or external high-explosive payloads, there is a real risk of detonation or a powerful blast if those explosives are heated, breached, or subjected to shock waves from the fire or aircraft collapse. The combination of a major fuel fire with the potential for a catastrophic explosion makes this scenario far more dangerous than aircraft that lack either factor.

Other factors described don’t inherently raise the fire hazard to the same level: having a smaller amount of fuel reduces the fuel-fire threat; operating with a single engine isn’t, by itself, a determinant of overall hazard in a fire situation; and the absence of crew members changes rescue and evacuation dynamics but does not change the intrinsic danger posed by large fuel quantities and stored explosives.