2026 New Mexico Combination CDL Practice Test 2

If your vehicle is equipped with dummy couplers, why should you connect the glad hands to them?

It will keep dirt and water out of the lines. If you don't, you will never build system pressure. The connected brake circuit becomes a backup air tank.

Correct Answer:

It will keep dirt and water out of the lines.

Access more questions from this quiz

Continue to 2026 New Mexico Combination CDL Practice Test 2 for more practice questions and the full quiz experience.

Access More Questions