Free California Air Brakes CDL Test 2025
Master the air brakes knowledge test with real California DMV questions and expert explanations
10 Questions
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What is the Air Brakes Test?
The Air Brakes knowledge test is required for commercial vehicles equipped with air brake systems. Passing this test demonstrates your knowledge of air brake operation, inspection procedures, and safety protocols, and removes the 'L' restriction from your CDL.
Test Details:
- 25 questions, 80% to pass, 30 minutes
- Required for: Vehicles with air brake systems
- Included in CDL permit fee; no separate charge for air brakes knowledge test
Career Opportunities:
- Long-haul trucking companies
- Local delivery services
- Construction vehicle operators
- Municipal transportation
California Air Brakes Test Topics
Air Brake System Components (8 questions)
- • Compressor and reservoir systems
- • Brake chambers and slack adjusters
- • Air lines and fittings
Inspection and Testing (7 questions)
- • Pre-trip inspection procedures
- • Air pressure tests
- • Brake adjustment checks
Safe Driving Practices (6 questions)
- • Proper braking techniques
- • Following distance requirements
- • Downhill braking procedures
Emergency Procedures (4 questions)
- • Air pressure loss procedures
- • Emergency braking systems
- • Brake failure protocols
California Air Brakes Study Tips
- 1Understand the air brake system components thoroughly
- 2Practice air pressure testing procedures
- 3Memorize safe following distances
- 4Know emergency braking procedures
- 5Review California air brake regulations and inspection requirements
What to Expect on the Test
Frequently Asked Questions About California Air Brakes
Do I need to pass the air brakes test in California?
If you plan to drive a commercial vehicle equipped with air brakes, you must pass the air brakes knowledge test to remove the 'L' restriction from your CDL.
How many questions are on the air brakes test?
The air brakes knowledge test consists of 25 multiple-choice questions. You need to answer 20 correctly (80%) to pass.
How long do I have to complete the air brakes test?
California DMV allows 30 minutes to complete the air brakes knowledge test. This time limit is standard across all California testing locations.
Other California CDL Tests
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10 Questions
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