What is the acceptable air pressure range during a pre-trip inspection?

The acceptable air pressure range during a pre-trip inspection is typically between 100 to 140 psi. This range is important because it ensures that the air brake system is functioning correctly and effectively. Having air pressure within this range allows for optimal operation of the vehicle's braking system, which is vital for safety.

Air brakes rely on compressed air to function properly, and insufficient pressure can lead to inadequate braking performance, increasing the risk of accidents. Therefore, maintaining pressure within the established range is crucial, as it confirms that the system can adequately compress air, release it when needed, and maintain the necessary pressure to engage the brakes effectively when the driver commands. Regular checks during pre-trip inspections help ensure that the braking system will perform reliably on the road.

The other ranges presented out of this acceptable limit are too high or too low, which could indicate problems with the air brake system and would be unsafe for operation.