California · California DMV
Commercial driver (CDL) knowledge tests
0%learned
2,396questions
PracticeGeneral knowledge0 / 1112
- Licenses, endorsements and tests0 / 105
- Disqualifications and state rules0 / 110
- Vehicle inspection0 / 80
- Basic control and shifting gears0 / 47
- Seeing and communicating0 / 46
- Controlling your speed0 / 62
- Managing space0 / 40
- Seeing hazards0 / 49
- Distracted and Aggressive Driving0 / 71
- Night, Fog, Winter and Hot Weather0 / 124
- Railroad Crossings and Mountain Driving0 / 65
- Emergencies, ABS and Skids0 / 102
- Accident Procedures and Fires0 / 49
- Alcohol, Drugs and Illness0 / 41
- Hazardous Materials Rules for All Drivers0 / 42
- Transporting Cargo Safely0 / 79
Air brakes0 / 223
Combination vehicles0 / 196
Passenger transport0 / 130
Doubles and triples0 / 50
Tank vehicles0 / 62
Hazardous materials0 / 421
–best2,396 questions · A different exam every time
General knowledge40 / 50 to pass Air brakes20 / 25 to pass Combination vehicles16 / 20 to pass Passenger transport16 / 20 to pass Doubles and triples16 / 20 to pass Tank vehicles16 / 20 to pass Hazardous materials24 / 30 to pass School bus16 / 20 to pass
Questions from the California Commercial Driver Handbook 2019, checked Oct 10, 2026.