An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.

There is something wrong with the brakes.

Truck tractors with air brakes built on or after March 1, 1997, and other vehicles with air brakes built on or after March 1, 1998, must be equipped with anti-lock brakes.

An Anti-Lock Braking System (ABS).

In a vehicle with dual parking control valves, there is a separate air tank that can be used to temporarily release the spring brakes if they have been activated due to low air pressure. Pushing in the proper control will release the spring brakes for a short period of time, allowing the driver to move the vehicle in an emergency.

To temporarily release the spring brakes.

To make the air brakes work more effectively.

To temporarily release the spring brakes.

To charge the brakes on the rear trailer.

Always apply the parking brake when leaving your vehicle unattended.

The parking brake must be always be used.

The parking brake should never be used.

Windows in the cab should be lowered.

The purpose of an Anti-Lock Braking System (ABS) is to prevent a vehicle's wheels from locking up when the driver brakes hard on a slippery surface.

Prevent your vehicle from accelerating when going uphill.

Air Brakes Endorsement Test | Louisiana 2024 #2 Page 4 of 4

Train for FREE online with our Louisiana CDL air brake test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a LA Class A/Class B driver license in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that the requirements for CDL may vary from state to state.

Number of Question 25

Passing Score 20

Number of Tests 20

Air Brakes Endorsement Test | Louisiana 2024 #2 Page 4 of 4

19 . What is removed when an air tank is drained?

20 . If the safety relief valve in the air brake system releases air:

21 . Truck tractors with air brakes built on or after March 1, 1997 must have:

22 . In a vehicle with dual parking control valves, a separate air tank can be used:

23 . When leaving your vehicle unattended:

24 . Do not operate a vehicle if any brake drums have cracks that are larger than ____ of the width of the friction area.

25 . ABS brakes:

Search the best driving school in your neighbourhood

Wait, before you go