North Carolina CDL — General Knowledge Practice Test

The North Carolina 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.

North Carolina 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
During the seven-step inspection, why should the driver take the ignition key along while walking around the vehicle?
Test 2
50 questions · pass with 40
In roadway work zones, what is the leading cause of injuries and deaths?
Test 3
50 questions · pass with 40
In heavy traffic, what is generally the safest speed to travel?
Test 4
50 questions · pass with 40
If a hill or curve blocks the view of your stopped vehicle, how should you adjust your warning-device placement?
Test 5
50 questions · pass with 40
Going from 20 mph up to 40 mph roughly multiplies your braking distance by how much?
Test 6
50 questions · pass with 40
A railroad crossing that has no traffic control device installed at it is called what kind of crossing?
Test 7
50 questions · pass with 40
When you park at the roadside and stop, which lights should you turn on, especially at night?
Test 8
50 questions · pass with 40
When you flash your brake lights to warn of trouble ahead, why is this especially important in a large vehicle?
Test 9
50 questions · pass with 40
How often should you inspect your tires when driving in very hot weather?
Test 10
50 questions · pass with 40
How many identical placards must a placarded hazardous-materials vehicle display?