CDL Mastery logo CDL Mastery Driver Knowledge Center
STRUCTURED CDL LEARNING

Choose what you need to master.

Build your CDL knowledge by subject. Start with a core test area, strengthen an endorsement, or review an inspection topic before test day.

CORE KNOWLEDGE

General Knowledge

Review inspections, safe driving, hazards, speed and space management, railroad crossings, emergencies, and test strategy.

Guide available Open guide →
BRAKING SYSTEMS

Air Brakes

Understand system components, pressure warnings, spring brakes, leakage checks, brake lag, and safe downgrade control.

Guide available Open guide →
VEHICLE INSPECTION

Pre-Trip Inspection

Build a repeatable inspection sequence and connect each component with what to inspect, what to say, and why it matters.

Guide available Open guide →
CLASS A KNOWLEDGE

Combination Vehicles

Learn coupling, fifth-wheel inspections, trailer air lines, off-tracking, rollover prevention, backing, and safe operation.

Guide available Open guide →
ENDORSEMENT

Hazardous Materials

Study ELDT and TSA requirements, hazard classes, shipping papers, placards, segregation, routing, security, and emergencies.

Guide available Open guide →
ENDORSEMENT · COMING SOON

Tank Vehicles

Prepare for liquid surge, outage, bulk-tank inspections, rollover risk, valves, loading, and safe tanker operation.

In development Coming soon
ENDORSEMENT · COMING SOON

Doubles and Triples

Learn converter dollies, coupling order, inspections, handling, rollover risk, and emergency decisions for multiple trailers.

In development Coming soon
ENDORSEMENT · COMING SOON

Passenger Transport

Review passenger safety, loading and unloading, vehicle inspection, emergency procedures, prohibited practices, and safe operation.

In development Coming soon
ENDORSEMENT · COMING SOON

School Bus

Prepare for danger zones, student loading, railroad crossings, emergency evacuation, inspections, and student management.