Air Brakes #1
Air Brakes Endorsement Test | Oregon 2026 #1
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 2026, 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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1 . The application pressure gauge:
Shows the number of times the brakes have been used.
In an air brake system, the application pressure gauge shows how much air pressure is being applied to the brakes. Not all vehicles with an air brake system have this gauge.
2 . What happens if the air pressure in a system's air tanks falls below 60 psi?
The vehicle should stop.
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.
3 . Once the air tanks are at an air pressure level of 125 psi, the air compressor governor will:
An air compressor governor will stop the compressor from pumping air once the air tanks are at an air pressure level around 125 psi. This air pressure level is referred to as the "cut-out" level.
4 . Brake fading is caused when:
Brakes are wet.
Using the brakes excessively will cause them to overheat, making them less effective. This is referred to as "fading."
5 . An Anti-Lock Braking System (ABS):
Should only be used if all axles have ABS.
Anti-Lock Braking Systems (ABS) are compatible with air braking systems. ABS helps maintain control of a vehicle and prevents the wheels from locking up during hard braking on slippery surfaces. ABS can still provide benefits even if is present on only one axle.
6 . If one air system in a dual air brake system is very low on pressure:
Lights on the outside of the tractor will flash.
In a dual air brake system, if one of the air systems gets very low on pressure, either the front or rear brakes will not be operating fully. You should bring your vehicle to a safe stop and have the air system repaired.
See the exact questions that will be on the 2026 Oregon DMV exam.
99.2% of people who use the cheat sheet pass the FIRST TIME
Lillian MCcranie explains how our CDL study guide was helpful in passing the exam and recommends it to everyone.
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2026 Oregon | Frequently Asked Questions
To acquire a CDL Passenger endorsement in Oregon, you must first have a valid Oregon CDL. Next, study the passenger endorsement section in the Oregon CDL manual. Then, pass the written passenger endorsement test at your local DMV. You'll also need to pass a road skills test in the vehicle type you plan to drive.
In Oregon, to obtain a CDL Passenger license, you must have a valid Oregon CDL. You also need to pass a written knowledge test and a road skills test in the type of vehicle you plan to drive. Additionally, you must be at least 21 years old and have a clean driving record. A medical examination is also required to ensure you're physically fit to drive.
In Oregon, while no specific training or experience is legally required to secure a CDL Passenger endorsement, it's highly recommended. Training can help you pass the written knowledge and road skills tests. Experience driving similar vehicles can also be beneficial. Ultimately, you must demonstrate the ability to safely operate a passenger vehicle to obtain the endorsement.
Yes, in Oregon, to obtain a CDL Passenger endorsement, you are required to pass a written knowledge test specifically for passenger vehicles. This test covers topics like vehicle inspection, loading and trip start, on the road, after-trip vehicle inspection, prohibited practices, and use of brake-door interlocks. The state does not require an additional physical exam beyond the CDL requirements.
During the CDL Passenger endorsement skills test, you need to demonstrate your ability to safely load and unload passengers, respond to emergency situations, conduct pre-trip vehicle inspections, operate the vehicle safely (including starting, stopping, and turning), and perform tasks like parallel parking and backing up the vehicle. You'll also need to show proficiency in handling busy urban traffic.
No, you cannot legally transport passengers in Oregon without a valid CDL Passenger endorsement. This endorsement is required for drivers who wish to drive a vehicle designed to carry 16 or more passengers, including the driver. Driving such vehicles without the appropriate endorsement could result in serious penalties, including fines and suspension of your CDL.
Yes, it's possible to add a CDL Passenger endorsement to your existing commercial driver's license in Oregon. You don't need a new application. However, you must pass the passenger endorsement written test and pay the required fee. After successful completion, the endorsement will be added to your existing CDL.
Yes, drivers with a CDL Passenger endorsement in Oregon are subject to specific regulations. They must ensure seatbelts are worn, adhere to maximum passenger limits, and follow safety protocols. Any violation could result in the suspension or revocation of the endorsement. Also, drivers are subject to random drug and alcohol testing as part of federal regulations for commercial drivers.
Yes, there are age-related prerequisites and limitations for acquiring the CDL Passenger endorsement in Oregon. To obtain the endorsement, you must be at least 18 years old and hold a valid Oregon CDL. However, if you plan to operate a commercial vehicle that transports passengers across state lines or carries hazardous materials, you must be at least 21 years old.
With a CDL Passenger endorsement in Oregon, you'll be eligible to operate vehicles such as buses, shuttles, and any other commercial vehicles that are designed to transport 16 or more passengers, including the driver. This includes school buses if you also have a School Bus endorsement. However, specific vehicle operation might also depend on the class of your primary CDL.
