Ohio CDL Air Brakes practice test
The Air Brakes test covers Section 5 of the Ohio CDL Manual (HSY 7605) and is required if your vehicle has air brakes (1.1.1, p. 1-5). Skip or fail it and your CLP or CDL carries the L restriction, no air brakes (p. 1-3).
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Key facts
| Pass mark | 80% on this test | 49 CFR 383.135 |
|---|---|---|
| Who takes it | Anyone whose vehicle has air brakes, including air over hydraulic | HSY 7605 p. 1-5 |
| Covers | Section 5: air brake parts, dual systems, inspection, use | HSY 7605 Section 5 |
| If you skip it | Restriction L: no air-brake vehicles | HSY 7605 p. 1-3 |
Topics
What the Air Brakes test covers
Questions drivers ask
- What is on the Ohio CDL air brakes test?
- Section 5 of the Ohio CDL Manual: the parts of an air brake system, dual air brake systems, inspecting air brakes and using air brakes. You must take it if your vehicle has air brakes, including air over hydraulic brakes.
- Source: Ohio CDL Manual (HSY 7605, July 2026), Section 5 and p. 1-5
- What does the L restriction mean on a Ohio CDL?
- No air brakes: you may not drive a commercial vehicle with any type of air brakes. It is added if you skip or fail the air brakes knowledge test, or take the skills test in a vehicle without air brakes.
- Source: Ohio CDL Manual (HSY 7605, July 2026), p. 1-3
Sources
Ohio Commercial Driver License Manual (HSY 7605), revised July 2026, Ohio Bureau of Motor Vehicles. Page references are to its printed page numbers. CDL Mile is independent and not affiliated with the Ohio BMV.
Updated for the July 2026 Ohio CDL manual (HSY 7605). Last checked November 5, 2026.
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