Air Brake Practice Test

When a vehicle pulls to one side while checking the service brakes, it typically indicates issues with the service brakes. This pulling effect often results from unequal brake force being applied to the wheels, which can occur if one side's brakes are more effective than the other due to problems such as misalignment, uneven wear, or malfunctioning components.

For instance, if one brake is grabbing excessively or is out of adjustment, it can cause the vehicle to pull toward that side. Checking for proper adjustment and ensuring that both the left and right brakes are functioning equally is crucial to maintaining safe braking performance.

While incorrect tire pressure, faulty air compressors, or worn tires can impact vehicle handling and braking performance, the specific symptom of pulling during a brake check directly points to the service brakes themselves as the source of the issue.