Practice question

For the Wisconsin CDL Doubles and Triples test, what is correct about emergency line role?

  1. charges trailer air tanks and supplies emergency brake air
  2. powers marker lights
  3. measures cargo weight
  4. locks the kingpin

Answer: A — charges trailer air tanks and supplies emergency brake air

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

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