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To obtain a CDL, you will be required to pass a vehicle inspection test. The vehicle inspection test, formerly known as pre-trip, is a skills test to see if you identify which features and equipment on the test vehicle should be inspected before driving. During the test, you will be asked to do an inspection of your vehicle. You will be expected to show your knowledge of the inspection process and you will be tested to see if you know whether your vehicle is safe to drive. During the CDL inspection test, DMV does not allow the use of testing aids, other than the vehicle inspection guide in the Illinois CDL Manual. To prepare for the test, study the following sections of the CDL manual: Driving Safely and the Vehicle Inspection Test. If you do not pass the CDL inspection test, the other skills tests will be postponed.
1. Which of the following is not a braking system on a truck?
Service brake
Emergency brake
Steering brake
Parking brake
2. Key suspension system parts include:
Bearing plates
Lock rings
Tie rod
All of the above.
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?
Alternator belt
Water pump
Power steering fluid
Air compressor
5. What should be clean with no obstructions, illegal stickers, or damages to the glass?
The lighting indicators.
The windshield.
The headlights.
None of the above.
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:
the air / electric lines.
the mounting bolts.
the exhaust system.
the locking jaws.
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Inspection Test - IL CDL

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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