What is the detonation velocity of detonating cord?

• A. Approximately 15,000 feet per second
• B. Approximately 22,000 feet per second
• C. Approximately 30,000 feet per second
• D. Approximately 10,000 feet per second

Answer: (B)

The detonation velocity of detonating cord is approximately 22,000 feet per second. This speed indicates how quickly the detonation wave travels through the cord, which is crucial for effective initiation of explosives in mining and demolition applications. Detonating cords are commonly composed of a core of high explosives, typically a type of PETN (Pentaerythritol Tetranitrate), surrounded by a protective outer layer. The specific velocity is significant because it allows for precise timing and sequential detonation of charges, ensuring safety and effectiveness in blasting operations. Other velocities listed in the options do not accurately represent the speed typically observed for detonating cord, making 22,000 feet per second the appropriate choice.