Illinois CDL Class B Practice Exam 2026

Straight trucks, dump trucks, transit and city buses, box trucks and refuse vehicles all sit under Class B, and this Illinois Class B CDL practice test is the 2026 rehearsal for the written stage. Whether you call it a CDL Class B test, a Class B license test, or a Class B license exam, the questions come from the same general knowledge pool.

Class B covers any single vehicle rated over 26,001 pounds, including one towing a trailer under 10,000 pounds. That is the line between it and Class A, and it is worth knowing the classes of CDL drivers licenses cold: Class A for heavy combinations, Class B for heavy single vehicles, and Class C for a smaller vehicle carrying 16 or more passengers or placarded hazmat - the class C commercial driver's license.

The exam runs 50 questions and 80 percent passes. Illinois warehousing, distribution, and municipal fleets hire Class B drivers constantly, so pair this CDL B practice test with the Illinois CDL Manual.

Keep going:

• Illinois Class A CDL Practice Test
• Illinois CDL Practice Test
• Illinois Air Brakes Practice Test
• Illinois CDL Combination Practice Test
• Illinois CDL Pre-Trip Inspection Practice Test
• Illinois Hazmat 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.