During a required en-route safety stop after driving for two hours in high ambient temperatures, a commercial driver inspects the vehicle's tires and mechanical components. Which of the following procedures should the driver follow to ensure safe operation in hot weather?
- ABleed air from tires showing elevated pressure readings to restore them to the standard cold-inflation pressure.
- BActivate auxiliary engine retarders to maximum strength when traversing road sections where surface tar is bleeding.
- Allow tires that are hot to the touch to cool down naturally without releasing any air pressure.Answer
- DApply immediate, hard service braking if thermal stress leads to sudden steer tire failure at highway speeds.
Answer
The driver should allow tires that are hot to the touch to cool down naturally without releasing any air pressure.
In hot weather conditions, commercial drivers must check tires every two hours or 100 miles. Air pressure naturally rises as tires generate heat while rolling. Drivers must never let air out of hot tires; doing so will result in dangerously low pressure once the tires cool down. If tires become too hot to touch, the vehicle must remain parked until the tires cool down naturally.
Step-by-Step Solution
Key Concept
Tire thermal management and pressure dynamics during hot weather operations
Estimated Time:1m 0s