Illinois CDL General Knowledge: Vehicle Inspection Test 2026

Inspection knowledge shows up in the written exam, in the skills test, and in every roadside inspection you will ever sit through, which makes the Illinois CDL vehicle inspection test one of the highest-value drills here. This 2026 Illinois CDL inspection practice test covers the pre-trip walk-around, the en-route checks you make at stops, the post-trip report, and the defects that put a vehicle out of service.

Questions run across tires and tread depth, wheels and lug nuts, brake components and slack adjusters, steering and suspension, lights and reflectors, mirrors and glass, coupling devices, fluid levels and leaks, and the emergency equipment that must ride with you. The Illinois CDL Manual lays out the sequence the Illinois Secretary of State expects.

To answer the common question: the Illinois CDL general knowledge exam contains 50 items and 80 percent passes, which is 40 right. Repeat this Illinois CDL vehicle inspection practice test until the walk-around order recites itself.

Keep going:

• Illinois CDL Practice Test
• Illinois CDL Practice Test 2
• Illinois CDL Practice Test 3
• Illinois CDL Practice Test 4
• Illinois Air Brakes Practice Test
• Illinois CDL Combination Practice Test
• Illinois CDL Pre-Trip Inspection Practice Test
• Illinois Hazmat Practice Test
• Illinois Class A CDL Practice Test
• Illinois CDL Practice Test

Every question traces back to the Illinois CDL Manual - skim the right-of-way and signs chapters before your retake.