What is the minimum distance required for smoking or open flames from high power rocket motors?

The correct answer is based on safety protocols concerning the use of high power rocket motors. A minimum distance of 25 feet is mandated to ensure that any potential ignition or explosion does not harm individuals or cause property damage. This distance is established to allow for sufficient separation between the hazards associated with the fuel and the potential ignition sources, such as smoking materials or open flames.

High power rocket motors can contain highly volatile propellants, and the risk of fire or explosion increases significantly in their presence. By maintaining a safe distance, it helps to minimize risks and ensures the safety of individuals in the vicinity. Other distances listed are out of standard guidelines established for such activities, which reinforce the necessity for a clear safety zone.