Ontario Air Brake Z Test Practice Questions - Ontario Air Brake (Z Endorsement) Knowledge Test Exam

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If air exhausts from the disconnected trailer service line during the tractor protection valve test, what is the result?

Pass - air should flow there Pass only if the trailer has ABS Ignore it because the supply valve is red Fail - the tractor protection valve is defective

Correct Answer:

Fail - the tractor protection valve is defective

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