78. What is the emergency air line?

Combination Vehiclesmedium

Aa. Air lines connecting the parking brake to the trailer brakes.

Bb. Air lines that control the emergency brakes of the tractor.

Cc. Air lines that control the emergency brakes on combination vehicles.

Detailed Explanation

The correct answer is "c. Air lines that control the emergency brakes on combination vehicles.". This is based on federal CDL regulations and safety standards.

Correct Answer: c. Air lines that control the emergency brakes on combination vehicles.

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

78. What is the emergency air line?

Detailed Explanation

Ready to practice for real?

Related Questions

63. To stop a trailer skid you should:

To help prevent rollovers, you should:

When uncoupling a trailer, landing gear should be:

One way to prevent a rollover is to:

When backing a trailer, how should you turn the steering wheel?