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The first step of a dual-circuit integrity test involves draining the front axle reservoir to 0 psi and then verifying which of the following?

Select one:

A. The trailer park brakes should apply only after the tractor protection valve closes.

B. The front axle brakes should apply and release.

C. The rear axle reservoir does not lose any pressure.

D. The trailer park brakes should apply and release.

Answer :

Final answer:

In a dual-circuit integrity test, after draining the front axle reservoir to 0 psi, it is important to verify that the front axle brakes apply and release properly. This step ensures the braking system's integrity is intact. Dual-circuit systems are critical for safety as they provide redundancy in case of a failure.


Explanation:

Understanding the Dual-Circuit Integrity Test

In a dual-circuit air brake system, the first step of the integrity test is crucial for ensuring safety and functionality. After draining the front axle reservoir to 0 psi, you need to verify a key aspect of the braking system's performance.

Answer Explanation

The correct verification after draining the front axle reservoir involves the functionality of the brakes. Specifically, the answer is:

  • O b. The front axle brakes should apply and release.

When the front axle reservoir is drained to 0 psi, it's essential that the front axle brakes still apply and release properly. This indicates that the system is functioning correctly and that the integrity of the hydraulic connection is maintained. If the front axle brakes do not apply or release correctly, it could suggest a failure in the brake system.

Importance of Dual-Circuit Systems

Dual-circuit systems are designed to provide redundancy. If one circuit fails, the other can still provide braking power, which is essential for the safe operation of vehicles, particularly those carrying heavy loads such as trailers.


Learn more about brake system integrity testing here:

https://brainly.com/question/37994966


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