CDL Air Brakes Test (2024) - FREE Arizona CDL Practice Test

1. When you apply the brakes, the brake shoes and linings are pushed against:

2. An alcohol evaporator:

is used to reduce the risk of ice in air brake valves and other parts during cold weather.
used to reduce the chance of the front wheels skidding.
protects the air brake system from too much pressure.

3. Perception Distance + Reaction Distance + Brake Lag Distance + Braking Distance = ?

Total Stopping Distance
Stopping Distance - (minus) Brake Fade Distance
Total Air Pressure

4. A dual air brake system:

has a single air brake system, which uses a single set of brake controls.
has two separate air brake systems, which use two separate sets of brake controls.
has two separate air brake systems, which use a single set of brake controls.

5. On front tires, tread should be at least:

6. If a load is 10 feet long, the minimum number of tie-downs required is:

7. Most heavy vehicles require ________ change gears.

8. Excessive use of the service brakes results in overheating and leads to:

9. Overloading a vehicle with cargo can have negative effects on all of the following except:

10. Emergency brakes and parking brakes must be held on by:

ARIZONA CDL AIR BRAKES PRACTICE TEST