Skip to main content
DMV Test Free
ENES

Practice test 4 of 10

Georgia CDL — Air Brakes Practice Test 4

The Georgia CDL — Air Brakes knowledge test has ~25 questions; you need ~20 correct (80%) to pass.

This practice test follows that format: 25 questions, pass with 20 correct. Answer every page, then grade it to see the answers and explanations.

Questions 1–10 of 25

  1. 1.Unlike hydraulic brakes, air brakes do not act the instant you press the pedal. How long does the air take to travel through the lines and apply the brakes?
  2. 2.In newer air-braked vehicles, the parking brake control is a:
  3. 3.The governor stops the air compressor from pumping once the tanks reach the cut-out level, which is around:
  4. 4.During stab braking in an emergency, when do you release the brake pedal — and when do you press it again?
  5. 5.How are the brake lights turned on in a vehicle with air brakes?
  6. 6.Your brakes are soaked and the temperature is below freezing. How can you dry them before you park?
  7. 7.Some dash-mounted control handles let you put the spring brakes on a little at a time. Why is that gradual action useful?
  8. 8.While you are driving, pressure in one half of your dual air brake system falls very low. What should you expect from the vehicle?
  9. 9.Only the tractor of your combination has antilock brakes. During a hard stop you see the trailer beginning to swing out. What does the manual tell you to do?
  10. 10.You are making a normal stop in an air-braked vehicle with a manual transmission. When should you push the clutch in?

0 of 25 answered