CDL General Knowledge/Topics & Blueprint
CDL General Knowledge Topics & Blueprint Breakdown
Explore all 6 testing domains covered in the 2026 examination blueprint. Practice individual subtopics or take full simulated exams.
Exam structure at a glance
CDL General Knowledge Blueprint Summary
The CDL General Knowledge is divided into 6 core subject domains containing a total of 146 verified questions. To pass, test-takers must achieve at least 80%.
- Passing target: 80% (Multiple-choice knowledge test · 80% to pass (49 CFR 383.135) · item count set by your state)
- Testing modules: 6 distinct domains
- Verified questions: 146 items
Select a Topic to Practice
Safe Commercial Driving Operations & Hazards
33 practice questions mapped to official blueprint
Commercial Vehicle Systems & Controls
29 practice questions mapped to official blueprint
Air Brakes & Vehicle Braking Systems
22 practice questions mapped to official blueprint
Doubles & Triples Combination Vehicles
21 practice questions mapped to official blueprint
Night Driving
21 practice questions mapped to official blueprint
Pre-Trip Inspection & Vehicle Safety Checks
20 practice questions mapped to official blueprint
Frequently Asked Questions About CDL General Knowledge Topics
The CDL General Knowledge tests knowledge across 6 primary domains: Safe Commercial Driving Operations & Hazards, Commercial Vehicle Systems & Controls, Air Brakes & Vehicle Braking Systems, Doubles & Triples Combination Vehicles, Night Driving, Pre-Trip Inspection & Vehicle Safety Checks.
QuizCram covers 146 verified practice questions categorized by testing module, each citing official handbook rules.
The standard passing mark is 80% (Multiple-choice knowledge test · 80% to pass (49 CFR 383.135) · item count set by your state).