IL CDL Inspection Test (2024) - FREE CDL Practice Test

1. Which of the following is not a braking system on a truck?

2. Key suspension system parts include:

3. What should you do to test your vehicle's low air pressure warning signal?

Release the parking brake valve and the tractor protection valve and reduce the air pressure by stepping on and off the brake pedal.
Pump the brakes until the air pressure drops below 80 psi.
With the engine running, put the vehicle in a forward gear and attempt to drive forward.
With the key in the "on" or "battery charge" position, rapidly apply and release the foot brake.

4. What maintains air pressure in the air brake system?

5. What should be clean with no obstructions, illegal stickers, or damages to the glass?

6. During the vehicle inspection, when checking the tires you should:

ensure that valve caps are missing.
ensure that the tread is evenly worn.
check for the minimum tread depth (4/32 on all tires).
ensure the middle of the tires is more worn than the outside.

7. During the vehicle inspection test, you may be asked to:

check the engine oil level.
replace the electrical and brake lines.
change the coolant.
remove a spare electrical fuse.

8. Exhaust system parts should NOT:

rub against tires.
rub against fuel system parts.
be loose.
All of the above.

9. Which of the following is true about the skills test?

It doesn't matter what vehicle you use to take these tests.
You must take the skills tests in a vehicle that has components marked or labeled.
You don't have to take the skills tests in the type of vehicle for which you wish to be licensed.
You must take the skills tests in the type of vehicle for which you wish to be licensed.

10. If you are checking that the air hoses and electrical lines are not spliced, cut, chafed or worn, you are inspecting:

VEHICLE INSPECTION CDL TEST ILLINOIS