Knowledge Test Class A #1
Class A Driving Test | Illinois 2025 #1 Page 5 of 7
Train for FREE online with our Illinois class A license 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 CDL class A permit 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 CDL class A requirements may vary from state to state.
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29 . Water and compressor oil are usually found in the compressed air within an air brake system. Water and compressor oil:
Are not concerns.
Compressed air in an air brake system usually contains a certain amount of water and compressor oil. The water and oil can damage the brakes if left to accumulate in the system. Manually operated air tank drains must be opened daily to remove this build-up.
30 . Overloading a vehicle with cargo can affect all of the following, except:
Cruise control.
Overloading can have negative effects on a vehicle's steering, braking and speed control.
31 . Why should rental trucks be approached with caution?
They do not respond to the driver as well as other vehicles.
You should be cautious when driving near rental trucks because the people driving them may not be used to operating vehicles with limited views to the sides and rear. Drivers who cannot see others on the roadway are hazardous.
32 . A school bus driver may not operate a school bus with a minimum blood alcohol concentration (BAC) of:
0.1 percent.
It is illegal to operate a school bus if your blood alcohol concentration (BAC) is above 0.00 percent. Operating a bus with a BAC of any detectable amount may result in license disqualification.
33 . The maximum height permitted for all vehicles on Illinois highways is:
19 feet.
In Illinois, the height of any vehicle is limited to 13 feet, 6 inches. Height measurements are taken from the underside of the tire to the top of the vehicle, load included.
34 . When performing a pre-trip inspection, you should make sure that:
There is something underneath the brake pedal.
When checking your vehicle's pedals during a pre-trip inspection, you should ensure that there is nothing under or around the pedals that will obstruct their use. Make sure the pedals are in proper working condition and that the surfaces of the pedals are grooved, if applicable.
35 . Regardless the size of the cargo, it should be secured by at least ____ tie-down(s).
Four
Cargo that is required to be tied down should be secured by at least one tie-down for every 10 feet of cargo length. However, at least two tie-downs should be used no matter how small the cargo is.
2025 Illinois | Frequently Asked Questions
A CDL Class A license in Illinois is a commercial driver's license that permits the holder to operate any combination of vehicles with a Gross Combination Weight Rating (GCWR) of 26,001 pounds or more, provided the vehicle(s) being towed is/are over 10,000 pounds. This typically includes tractor-trailers and truck and trailer combinations.
With a Class A CDL license in Illinois, you can operate vehicles such as tractor-trailers, truck and trailer combinations, tank vehicles, livestock carriers, and flatbeds. Additionally, it allows the operation of all vehicles covered by Class B and Class C, provided the driver has the appropriate endorsements.
To obtain a Class A CDL license in Illinois, you must be at least 18 years old (21 for interstate driving), possess a valid Illinois driver's license, pass a vision test, and complete a written knowledge exam. You're also required to pass a skills and road test in the type of vehicle you plan to drive. A medical examination report is also typically required.
To qualify for a Class A CDL license in Illinois, you must be at least 18 years old. However, to drive across state lines or to carry hazardous materials, you must be at least 21 years old. Also, you'll need to pass both a written knowledge test and a skills test.
While specific endorsements aren't required for a Class A CDL license in Illinois, additional endorsements can expand the types of vehicles you're allowed to drive or cargo you can transport. For example, an H endorsement permits the transportation of hazardous materials, while a P endorsement allows for the transportation of passengers.
The Class A CDL skills test in Illinois encompasses three parts: a pre-trip vehicle inspection, a basic vehicle control test, and a road test. Examinees must demonstrate their ability to inspect their vehicle, control the vehicle in various situations, and drive safely in normal traffic conditions.
Yes, limitations can be imposed on Class A CDL license holders based on factors like medical conditions or lack of certain skills. For example, a driver may receive a restriction if they can't operate a manual transmission or if they need adaptive equipment to drive. Restrictions are noted on the CDL and must be adhered to while operating commercial vehicles.
Yes, in Illinois, the written Class A CDL test is available in several languages besides English, including Spanish. However, federal law requires that all CDL holders understand English well enough to converse with the general public, understand highway traffic signs and signals, respond to official inquiries, and make entries on reports and records.
Yes, accommodations can be made for the Class A CDL written test if you have a disability. These may include providing the test in an alternate format or allowing additional time. It's important to contact the Illinois Secretary of State's office in advance to discuss your needs and make necessary arrangements.
Yes, you can retake the Class A CDL written test in Illinois if you don't pass on your first attempt. However, you'll need to wait at least 24 hours before retaking the test. Also, keep in mind that each retest may require an additional fee. It's advisable to study thoroughly before attempting the test again.