Ontario DZ Exterior Inspection Practice Exam

The correct answer indicates that the air pressure rise from 85 to 100 psi should take no more than 2 minutes to be considered a minor defect during an exterior inspection of a vehicle. This timing is significant because it reflects the efficiency of the vehicle's air braking system.

In practice, a system that can achieve this pressure increase within 2 minutes demonstrates a properly functioning and adequately maintained air compressor and air brake system. If it takes longer than this threshold, it might suggest issues such as air leaks, insufficient compressor performance, or maintenance needs that could impair the vehicle's braking effectiveness.

While the other options suggest shorter or longer time frames, they do not provide the balance that indicates an acceptable, yet cautious, range within which air systems should perform efficiently. Thus, recognizing 2 minutes as the benchmark highlights the importance of maintaining a reliable braking system for safety and compliance.