Illinois CDL — General Knowledge Practice Test
The Illinois CDL — General Knowledge knowledge test has ~50 questions; you need ~40 correct (80%) to pass.
Or take one of 10 full-length practice tests
50 questions · pass with 40 correct. You get instant feedback and an explanation after every answer.
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The full-length test, with feedback and an explanation after every answer.
Illinois CDL — General Knowledge practice tests
10 full-length practice tests, each with 50 questions and a pass mark of 40, like the real test. You see the answers and explanations after you grade.
- Test 1
50 questions · pass with 40
A driver with a hazardous-materials endorsement is convicted of a disqualifying crime. How quickly must they surrender the endorsement?
- Test 2
50 questions · pass with 40
What is the best overall advice about driving in fog?
- Test 3
50 questions · pass with 40
Where must a driver keep the shipping papers for a hazardous-materials load?
- Test 4
50 questions · pass with 40
What does it mean when a yellow ABS malfunction lamp on the dash stays lit?
- Test 5
50 questions · pass with 40
When getting ready for winter driving, what should you add to the windshield washer system?
- Test 6
50 questions · pass with 40
Before you change lanes, what should you do about your blind spots?
- Test 7
50 questions · pass with 40
How can you warn drivers behind you that you are about to slow down?
- Test 8
50 questions · pass with 40
Applying for a hazardous-materials endorsement requires the applicant to complete what additional step?
- Test 9
50 questions · pass with 40
You see brake lights, backup lights, and exhaust coming from a stopped delivery truck ahead. What do these clues suggest?
- Test 10
50 questions · pass with 40
In winter, which part of the road is most likely to ice up first?