Question 4 of 20
Score: 0/0When coupling a tractor to a semitrailer, in what position should you place the tractor protection valve control to test the trailer air brakes?
ExplanationThe tractor protection valve control must be in the normal position to supply air to the trailer and test the trailer’s air brakes properly.
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Did you know? Off-tracking means your trailer cuts the corner; account for it on every tight turn.
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