Illinois CDL Doubles And Triples Practice Questions - Illinois CDL Doubles And Triples Endorsement Test Exam

Before disconnecting dolly lines, what should be closed?

Air shut-offs at the rear of the first semitrailer and on the dolly if equipped The tractor fuel cap The fifth-wheel jaws The cab windows

Correct Answer:

Air shut-offs at the rear of the first semitrailer and on the dolly if equipped

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