AZ License Mock Exam With Correct Answers Version 2026/2027

AZ License Mock Exam With Correct Answers Version
2026/2027
1. What is the purpose of the tractor protection valve?

 A) To regulate air pressure to the front wheels.

 B) To protect the tractor's air supply if the trailer breaks away.

 C) To increase the trailer’s braking power.

 D) To drain moisture from the service line.

 Correct Answer: B. It prevents a total loss of air from the tractor if the trailer lines
rupture or disconnect.

2. When should you drain your air tanks?

 A) Once a week.

 B) Every 1,000 kilometers.

 C) Daily.

 D) Only during the winter.

 Correct Answer: C. Draining daily removes water and oil that can cause brake failure
or freezing.

3. What is the maximum width of a commercial vehicle (including load)?

 A) 2.4 meters.

 B) 2.5 meters.

 C) 2.6 meters.

 D) 3.0 meters.

 Correct Answer: C. The legal limit in Ontario is 2.6 meters.

4. What color is the trailer supply line?

 A) Blue.

 B) Green.

 C) Red.

 D) Yellow.

 Correct Answer: C. Red signifies the emergency/supply line.

5. At what pressure should the low-air warning device activate?

 A) Below 40 psi.

 B) Below 60 psi.

 C) Below 80 psi.

,  D) Below 100 psi.

 Correct Answer: B. It must activate at or above 60 psi (414 kPa).

6. What does "brake fade" mean?

 A) The air compressor is failing.

 B) The brakes are freezing in cold weather.

 C) The brakes are overheating and losing stopping power.

 D) The air lines are leaking.

 Correct Answer: C. Overheating causes the drums to expand away from the shoes.

7. What is the "tug test" used for?

 A) Checking the engine's horsepower.

 B) Testing the strength of the air lines.

 C) Verifying that the fifth wheel is locked to the kingpin.

 D) Checking the trailer's tire pressure.

 Correct Answer: C. Gently pulling forward ensures the coupling is secure.

8. What is the minimum tread depth for a steering tire?

 A) 1.5 mm.

 B) 2.0 mm.

 C) 3.0 mm.

 D) 4.0 mm.

 Correct Answer: C. Front steering tires require at least 3.0 mm of tread.

9. When backing under a trailer, the trailer should be:

 A) High enough to see light under it.

 B) Low enough that the tractor lifts it slightly.

 C) Exactly level with the fifth wheel.

 D) Higher than the tractor's cab.

 Correct Answer: B. This ensures the kingpin doesn't jump over the fifth wheel.

10. What is the maximum "on-duty" time allowed in a 7-day cycle?

 A) 60 hours.

 B) 70 hours.

 C) 80 hours.

 D) 100 hours.