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If your test of the tractor protection valve is successful:

1. The tractor protection valve control (trailer air supply control) will pop out or go from "normal" to "emergency."
2. The parking brake valve will pop out.
3. The low air pressure warning signal will come on.

Answer :

Final answer:

The question is about testing the tractor protection valve in Engineering, specifically related to the functionality of the valve and its impact on the brake system.

Explanation:

The subject of this question is Engineering, specifically related to tractor protection valve testing.

According to the question, if the test of the tractor protection valve is successful, three things will happen:

  1. The tractor protection valve control (trailer air supply control) will pop out or go from "normal" to "emergency."
  2. The parking brake valve will pop out.
  3. The low air pressure warning signal will come on.

This test is important because if the tractor protection valve fails, it can lead to a loss of air pressure in the brake system, resulting in a potentially dangerous situation for the tractor and its connected vehicle.

Learn more about Tractor protection valve testing here:

https://brainly.com/question/31659755

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