Lux Bus America School Pupil Activity Bus (SPAB) Practice Test 2026 - Free SPAB Practice Questions and Exam Prep Guide

The correct answer regarding the minimum BC requirement for a fire extinguisher on a School Pupil Activity Bus (SPAB) is that it must not be less than 4 BC. This requirement is in place to ensure that the bus is equipped with a fire extinguisher that is adequately rated to handle potential fire emergencies that may arise during pupil transport. A fire extinguisher with a BC rating of 4 indicates that it is designed to effectively combat fires involving flammable liquids and electrical equipment, which are critical considerations in a school bus environment.

Moreover, this rating helps ensure the safety of passengers, particularly children, by providing a means to address small fires before they escalate into larger emergencies. Having an appropriately rated fire extinguisher is a vital aspect of safety compliance for all SPABs, which prioritize the well-being of students during transport.