Pass the CDL knowledge tests
1,129 questions across 10 tests. Every answer quotes the federal regulation it comes from, so you can check it rather than take our word for it. Pass mark is 80%, the same as the real test.
General Knowledge
Everyone takes this one. Rules, control, inspection, cargo, hazards.
Air Brakes
Needed to drive anything with air brakes. Fail it and you get an L restriction.
Combination Vehicles
Required for a Class A. Coupling, handling and combination air brakes.
Pre-Trip Inspection
What to look at, what the limits are, and what puts a vehicle out of service.
Road Signs
Shape, color and meaning, from the federal sign manual.
Hazardous Materials
The H endorsement. Placards, papers, segregation, emergencies.
Tank Vehicles
The N endorsement. Surge, baffles, attendance and emergency systems.
Doubles and Triples
The T endorsement. Coupling through a dolly, and how a double behaves.
Passenger
The P endorsement. Loading, exits, baggage and braking with people aboard.
School Bus
The S endorsement. Danger zones, the stop arm and railroad crossings.