Answer :
Final answer:
The park and emergency valves in a vehicle's braking system activate when there is an air loss to ensure safety. They are primarily connected to the trailer's air supply system. Therefore, the correct answer is option b: Trailer.
Explanation:
Understanding Park and Emergency Valves
The park and emergency valves are crucial safety features found in vehicle braking systems, particularly in large vehicles like trucks and trailers. These valves are designed to pop out or engage in the event of air loss to prevent the vehicle from rolling or losing braking capability.
When there is a significant air leak, the tractor or trailer's braking system can become compromised. Both the park valve and the emergency valve are typically connected to the air supply of the trailer. If there is air loss in the trailer, both valves will pop out to apply the brakes automatically, ensuring the vehicle comes to a stop safely.
Thus, the correct answer to the question, "The park/emergency and trailer supply valves both pop out in case of air loss in the...", is b. Trailer.
Learn more about braking systems here:
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