Back to Practice Tests

Q

Test the tractor protection valve by:

Combination Vehiclesmedium

AInspecting it visually

BReleasing air with the brake pedal

CChecking the pressure gauges

Detailed Explanation

The correct answer is "Releasing air with the brake pedal". This is based on federal CDL regulations and safety standards.

Correct Answer: Releasing air with the brake pedal

Advertisement

Ready to practice for real?

Take our free, full-length Combination Vehicles practice test. Simulates the actual DMV exam with timed questions.

Start Practice Test

Related Questions

96. A driver crosses the airlines when hooking up an old trailer with no spring brakes.

combination-vehiclesmedium

In a double or triple combination:

combination-vehiclesmedium

8. Why should you be sure that the fifth wheel plate is greased as required?

combination-vehiclesmedium

11. Before you back under a trailer, make sure the:

combination-vehiclesmedium

To test the trailer service brakes, you should:

combination-vehiclesmedium

Advertisement