Combination #2
Combination Vehicles Practice Test | Illinois 2026 #2 Page 3 of 3
Train for FREE online with our Illinois CDL combination vehicle 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 combination 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 DMV requirements for issuing a combination license may vary from state to state.
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15 . When the wheels of a trailer lock up:
They will likely go flat.
A trailer may swing out and strike other vehicles if its wheels lock up. This is especially likely with lightly-loaded trailers.
16 . Starting in which year were newly manufactured trailers required to have ABS?
2004
All trailers and converter dollies manufactured on or after March 1, 1998 must be equipped with Anti-Lock Braking Systems (ABS).
17 . If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Parking on a slight incline.
If a parked trailer does not have spring brakes, wheel chocks should be used to prevent it from moving. Air brakes can only hold a parked trailer for as long as there is air pressure remaining in the air tanks, so wheel chocks will ensure safety.
18 . What is another name for the service line?
The power line
The trailer service air line is also referred to as the control line or signal line.
19 . If a load is placed on one side of a trailer, the trailer:
Have improved steering.
If the weight of a load is placed primarily one side of a trailer, the trailer may lean, increasing the risk of a rollover.
20 . When coupling a trailer:
Only one set of glad hands should be connected.
When coupling, make sure you couple matching glad hands. They are often color-coded to help drivers avoid mistakes. Typically, blue is used for service lines and red is used for emergency lines.
2026 Illinois | Frequently Asked Questions
To secure a CDL Bus endorsement in Illinois, you must first possess a Commercial Driver's License (CDL). Then, pass a passenger endorsement test which covers topics like bus inspection, loading/unloading passengers, and emergency procedures. Additionally, you may need to pass a skills test in the type of bus you wish to drive.
To obtain a CDL Bus license in Illinois, you must be at least 21 years old, have a valid Illinois driver's license, and pass a vision test. You will need to pass both a written and skills test for the Commercial Driver's License (CDL). For the bus endorsement, you must pass the Passenger Vehicles written test and perform a driving test.
Yes, specific training is necessary for a CDL Bus endorsement. You need to pass a written passenger endorsement test and a skills test in the type of bus you wish to drive. Some individuals may require additional training depending on their experience level, including hands-on driving practice and understanding safety regulations.
CDL Bus licenses in Illinois fall into three classifications: Class A, B, and C. Class A is for vehicles with a combined weight over 26,001 lbs. where the towed vehicle is over 10,000 lbs. Class B is for single vehicles over 26,001 lbs. or towing another vehicle not over 10,000 lbs. Class C is for vehicles designed to transport 16 or more passengers including the driver.
No, you cannot use your personal vehicle for the CDL Bus driving test. The vehicle used for the test must match the type and class of CDL you're applying for. For a bus endorsement, you must take the test in the type of bus you plan to drive. This ensures you can handle and operate that specific vehicle safely.
During the CDL Bus driving test, you are evaluated on specific skills like pre-trip vehicle inspection, basic vehicle control, and on-road driving. These may include maneuvers like backing up, parallel parking, making turns, and highway driving. You will also be evaluated on your ability to handle bus-specific situations like loading and unloading passengers safely.
Yes, there are additional medical prerequisites for a CDL Bus endorsement. You must pass a Department of Transportation (DOT) physical examination every two years. The exam evaluates your vision, hearing, blood pressure, and checks for diabetes and other potential health issues. You'll also need to self-certify your medical status with the Illinois Secretary of State's office.
No, it is not permissible to transport passengers without a valid CDL Bus endorsement in Illinois. This is a legal requirement, and driving a commercial passenger vehicle without the appropriate endorsement can result in significant fines, license suspension, and even jail time. It ensures the driver has the necessary skills and knowledge for passenger safety.
Yes, the CDL Bus endorsement can be added to your existing CDL in Illinois. You don't need to apply for a new CDL. However, you must pass the Passenger Transport Test and a skills test in the type of vehicle you'll be driving. Additionally, a background check is required for school bus drivers.
Yes, there are restrictions for drivers with a CDL Bus endorsement in Illinois. These include a zero-tolerance policy for alcohol and drugs, mandatory regular medical examinations to ensure fitness to drive, and adherence to hours-of-service regulations to prevent fatigue. Additionally, drivers must always wear seat belts and obey speed limits. Violations can lead to fines, license suspension, or revocation.