Air Brakes #1
Air Brakes Endorsement Test | Illinois 2025 #1 Page 3 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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13 . How is the parking brake released?
By tapping the accelerator twice
In vehicles with air brakes, the parking brake is controlled by a knob. The knob is pulled out to apply the brakes, and pushed in to release them.
14 . Which type of brakes do most heavy-duty vehicles have?
Gravity brakes
For safety, most heavy-duty vehicles are equipped with dual air brake systems.
15 . Vehicles with dual air brake systems:
Maintain air pressure when shut off for periods of less than four hours.
Before driving a vehicle with a dual air brake system, allow time for the air compressor to build up pressure of at least 100 psi in both the primary and secondary systems.
16 . In a dual air brake system:
One system is the main braking system and a second system is ready to be used if the first one fails.
A dual air brake system is made up of two separate air brake systems. The systems share a single set of brake controls, but each has its own air tanks, hoses, and lines.
17 . What does the air compressor governor do?
Controls the temperature of the air leaving the air storage tanks.
In an air brake system, the air compressor governor controls when the air compressor pumps air into the air storage tanks.
18 . The safety valve located on the first tank opens:
After every stop.
In an air brake system, the first tank that receives compressed air has a safety valve that releases air if the pressure gets too high. It is usually set to open at 150 psi. If the valve must open, there is a fault in the system that should be repaired by a mechanic.
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.