What is the minimum speed a bumper system is rated to withstand?

What is the minimum speed a bumper system is rated to withstand?

• A. 0 mph
• B. 2.5 mph
• C. 5 mph
• D. 10 mph

Answer: (B)

Bumpers are built to tolerate everyday, low-speed contacts that can happen during vehicle stabilization or when tools and equipment are used nearby. The rating reflects the minimum impact speed at which the bumper system should still perform without permanent damage or loss of function. A minimum rating of 2.5 mph means the system is assured to handle gentle bumps typical in rescue operations.

Choosing a lower value like 0 mph would imply no impact testing at all, which isn’t practical for real-world use. Higher numbers (5 or 10 mph) describe greater endurance, but they aren’t the minimum required rating. Therefore, 2.5 mph is the appropriate minimum.