Air Brakes #1
Air Brakes Endorsement Test | Oregon 2025 #1 Page 3 of 4
Train for FREE online with our Oregon 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 OR 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.
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13 . You should not use the parking brake:
If your vehicle's other braking systems seem to be working adequately.
A parking brake should not be used if the vehicle's brakes are very hot from use on a steep downgrade or if the brakes are very wet and temperatures are freezing. Using the parking brake when brakes are hot could cause damage to the brakes, and using the brakes when they are wet in freezing weather may cause the brakes to ice up, rendering the vehicle immobile.
14 . During an applied leakage test, what is the maximum leakage rate that is safe for a single vehicle with air brakes?
It is important to know the maximum air loss rate that is safe for your specific vehicle. A single vehicle with air brakes should have a leakage rate no higher than 3 psi in a minute during an applied leakage test.
15 . Foundation brakes are used:
Foundation brakes are used on each wheel of a CMV. The most common type of foundation brake is the s-cam drum brake.
16 . What can happen if parking brakes are used in very wet weather with temperatures below freezing?
The brakes may become too smooth to be used.
Parking brakes should not be used in very wet weather when temperatures are below freezing. The brakes could become frozen in place, making it impossible to move the vehicle.
17 . When only the tractor is equipped with an Anti-Lock Braking System (ABS):
The brakes will become more sensitive.
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.
18 . To inspect slack adjusters on S-cam brakes, you need to:
Chock the wheels and disengage the parking brake.
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.
2025 Oregon | Frequently Asked Questions
To acquire a CDL Hazmat endorsement in Oregon, you need to pass a written test. First, you must apply at a DMV office, provide proof of U.S. citizenship or lawful permanent residency, and pass the Hazmat knowledge test. After passing the test, you'll need to undergo a federal TSA background check. Once cleared, your new endorsement will be added to your CDL.
To obtain a CDL Hazmat license, you must have a Commercial Driver's License (CDL). You should also be at least 21 years old, a U.S. citizen or have lawful permanent residency. You must pass the Hazmat knowledge test and a Transportation Security Administration (TSA) background check. Lastly, you should have a clean driving record and no disqualifying criminal offenses.
When applying for a CDL Hazmat endorsement, you need to provide proof of U.S. citizenship or lawful permanent residency. This could be a passport, birth certificate, or Permanent Resident Card. You also need your current valid Commercial Driver's License (CDL). Finally, you must complete and pass the TSA background check, and the Hazmat knowledge test results are required.
Yes, there is a dedicated written test for the CDL Hazmat endorsement. The test covers topics like loading and unloading hazardous materials, bulk packaging marking, driving and parking rules, and emergency response procedures. This knowledge test is required in addition to the general CDL written test. You must pass this test to receive your Hazmat endorsement.
The written test for the CDL Hazmat endorsement covers various subjects related to hazardous materials. These include understanding hazard classifications, proper loading and unloading procedures, use of placards and labels, transport rules and regulations, emergency response procedures, and the handling and transport of specific types of hazardous materials.
Yes, there are extra charges associated with acquiring a CDL Hazmat endorsement. These fees cover the written test, fingerprinting, and a background check. The exact cost can vary based on the state you're in, but in Oregon, the total fee is typically around $100. It's advisable to check the exact costs with your local DMV office.
Yes, to obtain a CDL Hazmat endorsement, you must pass a Transportation Security Administration (TSA) background check. This includes a review of your criminal, immigration, and FBI terrorist watch list status. The purpose is to ensure you are not a security risk and can safely transport hazardous materials.
Yes, specialized training or certification is mandatory for the CDL Hazmat endorsement. Applicants must pass a written knowledge test on hazardous materials regulations and safety procedures. Additionally, they must undergo a Transportation Security Administration (TSA) background check. The training ensures drivers can safely handle and transport hazardous materials.
No, you cannot legally transport hazardous materials without a valid CDL Hazmat endorsement in Oregon or any other state. The endorsement ensures that drivers have the necessary training and knowledge to handle and transport hazardous materials safely. Violating this regulation can lead to severe penalties, including fines and suspension of your CDL.
Yes, you can add a CDL Hazmat endorsement to your existing CDL license. You don't need to apply for a new CDL. However, you must pass the Hazmat knowledge test, undergo a TSA background check, and pay the required fees. The endorsement is then added to your existing CDL upon approval.