In an air brake system, a low pressure warning signal should activate if the pressure in the air tanks falls to a level below 60 psi. This signal may be in the form of a warning light or a wig wag.

The vehicle will not shift out of gear.

The parking brake in a vehicle with air brakes should be used every time the vehicle is parked.

Used whenever you park your vehicle.

Set when driving in bad weather.

Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

Chock the wheels and disengage the parking brake.

Park on a hill and test the brakes.

Put on gloves and push in the slack adjusters.

Remove the drum and look inside.

Chock the wheels and disengage the parking brake.

If a tractor is equipped with an Anti-Lock Braking System (ABS) but the trailer is not, the risk of jackknifing will be reduced and the driver should still be able to maintain steering control. If only the trailer is equipped with ABS, it is less likely that the trailer will swing out to one side.

There is a decreased risk of jackknifing.

There is an increased risk of jackknifing.

The brakes will not work as effectively as they would without ABS.

The brakes will become more sensitive.

In an air brake system, the air storage tanks must be drained to remove accumulated water and compressor oil. Failing to do so can cause damage. Manually operated drains should be used at the end of each day of driving.

Are used to drain water and compressor oil from the air tank.

Allow rain water to enter the tank.

Are used to drain water and compressor oil from the air tank.

Must remain open during transit.

Air Brakes Endorsement Test | New York 2025 #2 Page 3 of 4

Train for FREE online with our New York 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 NY Class A/Class B driver license in 2025, 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 | New York 2025 #2 Page 3 of 4

13 . What happens if the air pressure in a system's air tanks falls below 60 psi?

14 . The parking brake should be:

15 . To inspect slack adjusters on S-cam brakes, you need to:

16 . When only the tractor is equipped with an Anti-Lock Braking System (ABS):

17 . Air tank drains:

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

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