Ohio CDL — General Knowledge Practice Test

The Ohio 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.

Ohio 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
The X-shaped cross-buck posted at a grade crossing is a sign that directs drivers to do what?
Test 2
50 questions · pass with 40
Which factors together determine a person's blood alcohol concentration?
Test 3
50 questions · pass with 40
Why is a leaking exhaust system especially dangerous in cold weather with the cab closed up?
Test 4
50 questions · pass with 40
To measure your following distance in seconds, what should you do?
Test 5
50 questions · pass with 40
If your vehicle carries hazardous materials in amounts that require placards, what must you have?
Test 6
50 questions · pass with 40
What is a hazard, as the manual defines it?
Test 7
50 questions · pass with 40
At a grade crossing with no stop line painted on the pavement, a driver required to stop must halt within what distance of the closest rail?
Test 8
50 questions · pass with 40
In which language must the vehicle inspection and basic control skills tests be administered?
Test 9
50 questions · pass with 40
What is the stab braking method?
Test 10
50 questions · pass with 40
What is the only thing that will actually lower a drinker's blood alcohol concentration?