In a road acceptance test, a fully loaded pumper must be able to come to a full stop from 20 mph within how many feet?

• A. 30 feet
• B. 35 feet
• C. 40 feet
• D. 45 feet

Answer: (B)

Braking distance for a heavy fire apparatus hinges on dissipating the vehicle’s kinetic energy through friction in the brakes and tires, plus how weight affects that energy. In road acceptance testing, that braking capability is defined as a maximum distance the pumper must cover from 20 mph to a complete stop under loaded conditions. For a fully loaded pumper, the standard sets this limit at 35 feet. That means if the vehicle can come to a complete stop within 35 feet, it passes the test; longer stopping distances would fail the test. While stopping even shorter, like 30 feet, would also meet safety expectations, the test specifies 35 feet as the threshold to account for variations in road conditions, tire grip, and braking effectiveness. Practically, keep the braking system well maintained, tires in good condition, and be mindful that heavier weight increases stopping distance, hence the importance of testing against that 35-foot limit.