Manitoba Airbrake Practice Exam 2025 - Free Airbrake Practice Questions and Study Guide

When air loss in a vehicle exceeds the maximum allowable limit, this indicates a significant issue that requires immediate attention. Minor defects, as suggested in option A, refer to small issues that do not impact vehicle safety or operation. Option B, "standard condition," is incorrect as it implies that air loss is a normal occurrence in a vehicle when it is actually a problem. Similarly, option D, "normal operation," is incorrect as it suggests that it is common for a vehicle to lose air, which is not the case. Option C, "major defect," is the best answer as it accurately reflects the severe consequence of excess air loss in a vehicle.