How can you check that air is actually getting all the way to the second trailer?

Answer options

Why

When that valve at the very end of the rig is opened, air should rush out, proving the supply line is charged through every trailer. If nothing comes out, check that the shut-off valves along the way are open, because without air all the way back the rear brakes will not work.

About this question

Topic: Doubles and triples   License: CDL

Part of these practice sets:

• Inspecting Doubles and Triples

Where it applies: Asked in every state.

Practice the whole set

This question is part of Inspecting Doubles and Triples (15 questions). Take the full set and check your score.

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