Practice question

What must be done before backing under a trailer?

  1. Before backing under a trailer, secure it with locked brakes or wheel chocks.
  2. release every brake
  3. stand between moving units
  4. leave it on a grade unsecured

Answer: A — Before backing under a trailer, secure it with locked brakes or wheel chocks.

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: Ohio CDL Doubles and Triples Endorsement Test Practice Questions - Ohio CDL Doubles and Triples Endorsement Test Exam →