InspectionQuestion 75 of 116
What must you do first in the tractor protection check?
- Push the red button and check that the yellow button is pulled
- Disconnect the trailer air lines
- Hold a full brake application
- Build the pressure to cut-out
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Correct answer: Push the red button and check that the yellow button is pulled
The first task is to push the trailer air supply valve (red button). The yellow button must be pulled.
Questions last reviewed: 18 October 2026