CDL Combination Vehicles TestInspecting Combination VehiclesMedium
During a pre-trip inspection of a combination vehicle, you notice that the trailer's glad hands are corroded and show signs of air leakage when the brakes are applied. What is the immediate and most appropriate action you should take?
- AReplace the corroded glad hands before starting the trip.
- BProceed with the trip but plan for a replacement at the next service stop.
- CReduce the maximum air pressure in the system to minimize leakage.
- DApply a temporary sealant to the glad hands and monitor them during the trip.
Show answer & explanationAnswer & explanation
Correct answer: A. Replace the corroded glad hands before starting the trip.
Corroded glad hands indicate a compromised air seal, which can lead to brake failure. Replacing them immediately ensures the integrity of the air brake system and safe operation.
Why the other options are wrong
- B. Operating a vehicle with known air brake system defects is unsafe and illegal.
- C. Reducing air pressure would compromise braking capability and is not a solution for leaking components.
- D. Temporary sealants are not a reliable or safe fix for air brake components.
Glad Hand Inspection
Glad hands are connectors for the air lines between the tractor and trailer. Proper function requires them to be clean, free of corrosion, and to seal tightly.
- Connects tractor and trailer air lines.
- Must be clean and free of damage/corrosion.
- Ensures airtight seal for air brake system.
- Red (emergency) and blue (service) lines.
Memory trick: Glad hands must be happy, or the brakes will be sad.