Air Brake Practice Test

The loss of air pressure in a combination vehicle exceeds 1 psi per minute when the brake pedal is under pressure. Is this statement true or false?

1. True

2. False

The correct answer is: False

The statement is false. In a well-functioning air brake system, the loss of air pressure during a brake application should not exceed 1 psi per minute. This threshold is an indicator of the integrity of the air brake system, as significant air loss can signify a leak or other malfunction that compromises brake performance. It's essential for safety that the system maintains air pressure during operation, and regular checks are conducted to ensure that the air loss is within acceptable limits. If the rate of air pressure loss exceeds this, it signals a need for a thorough inspection and potential repairs to prevent brake failure.