Air Brakes #1
Air Brakes Endorsement Test | Illinois 2025 #1 Page 4 of 4
Train for FREE online with our Illinois 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 IL 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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19 . Air tank drains:
Clean the air in the passenger compartment.
In an air brake system, air tanks have drains to remove accumulations of water and compressor oil. Allowing water and oil to accumulate in the system could cause damage to the brakes. Manually operated drains should be used daily.
20 . In a vehicle with dual air brakes, what happens if one system is low on pressure?
The low system will use an auxiliary system to fill the tank.
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.
21 . 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.
22 . In a newer vehicle, you apply the parking brake:
By using a black round knob.
In a newer vehicle with air brakes, the parking brake is controlled by a diamond-shaped yellow knob. The knob is pulled out to apply the parking brakes and pushed in to release them.
23 . How is the parking brake released?
By tapping the accelerator twice
In newer vehicles with air brakes, the parking brakes are controlled by a diamond-shaped yellow knob. Pull the knob out to activate the parking brakes and push it in to release them.
24 . Emergency brakes:
Are optional.
All trucks, truck tractors, and buses must be equipped with emergency brakes and parking brakes. These brakes must be held by mechanical force.
25 . Most heavy-duty vehicles use:
Quadruple air brake systems.
Most heavy-duty vehicles use dual air brake systems, in which there are two separate braking systems operated by a single set of controls. Each system operates the brakes on different axles.
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2025 Illinois | Frequently Asked Questions
To get a CDL Passenger endorsement in Illinois, you must first hold a valid Commercial Driver's License (CDL). Then, you need to pass a written passenger transport test. After passing the test, you'll need to pass a skills test in a vehicle of the same class that you plan to drive. Fees apply for testing and endorsement addition.
To obtain a CDL Passenger license in Illinois, you must hold a valid Commercial Driver's License (CDL), pass a written passenger transport test, and a skills test in a passenger vehicle. You must also be at least 21 years old, have a good driving record, pass a medical examination, and complete an application with the required fee.
While Illinois doesn't mandate specific training for a CDL Passenger endorsement, it's beneficial to have professional training or experience. This helps in passing the written and skills tests, which cover pre-trip vehicle inspection, safe driving practices, and emergency procedures. Studying the Commercial Driver's License Study Guide also helps prepare for the exams.
Yes, in Illinois, to secure a CDL Passenger endorsement, you need to pass an additional written test focused on passenger transport. This test covers topics like vehicle inspection, loading/unloading passengers, and emergency procedures. A skills test in a passenger vehicle is also required. These are in addition to the general CDL tests.
During the CDL Passenger endorsement assessment, you'll need to demonstrate skills such as inspecting the vehicle, safe loading and unloading of passengers, proper use of emergency exits and equipment, and safe driving practices. You may also need to perform maneuvers like turning, backing up, and parallel parking a large passenger vehicle.
No, you cannot legally transport passengers commercially in Illinois without a valid CDL Passenger endorsement. It's mandatory for drivers of vehicles designed to carry 16 or more passengers, including the driver. Violating this requirement can lead to fines, suspension of your CDL, or even legal penalties. Always ensure your endorsements are current and valid.
Yes, you can add a CDL Passenger endorsement to your existing CDL in Illinois. It doesn't require a new license application, but you will need to pass the Passenger Transport written test and the skills test in a passenger vehicle. Once you pass these tests, the endorsement can be added to your current CDL.
Yes, there are certain restrictions for drivers with a CDL Passenger endorsement in Illinois. Drivers are not allowed to consume alcohol or use controlled substances while on duty. They must also adhere to hours-of-service regulations to prevent fatigue. Additionally, drivers must follow safety procedures for loading and unloading passengers and handling emergencies.
Yes, to acquire a CDL Passenger endorsement in Illinois, you must be at least 21 years old. This is because federal law requires drivers of vehicles that can carry 16 or more passengers, including the driver, to be at least 21. However, there are no upper age limits as long as the driver can pass the required tests.
With a CDL Passenger endorsement in Illinois, you will be eligible to operate a variety of passenger vehicles. This includes buses, shuttle vans, and any vehicle designed to transport 16 or more passengers, including the driver. It's important to note that certain vehicles may require additional endorsements, such as a School Bus endorsement for school buses.
