District of Columbia CDL General Knowledge Practice Test 3 2026

This District of Columbia CDL practice test leans toward the drivers heading for a Class A or Class B rating, blending general knowledge with the mindset those bigger vehicles demand. Whether you want a CDL A practice test warm-up or Class B preparation, the written general knowledge exam is the shared starting line for both.

The test questions for CDL candidates here revisit weight limits, vehicle control, braking, and inspection, the fundamentals that matter whether you pull a combination rig or operate a single heavy unit. Remember that the general knowledge exam itself is 50 questions with an 80 percent passing bar, taken before your class is ever decided by the skills test.

Lean on the District of Columbia CDL Manual as you review, because it defines every rule these questions probe. Run this 2026 CDL class A and class B practice drill, mark the items you miss, and return until the answers come quickly. Consistent practice now shortens the road to your DC commercial license.

Keep going:

• District of Columbia CDL Practice Test
• District of Columbia CDL Practice Test 2
• District of Columbia CDL Practice Test 4
• District of Columbia CDL Practice Test 5
• District of Columbia Air Brakes Practice Test
• District of Columbia CDL Combination Practice Test
• District of Columbia CDL Pre-Trip Inspection Practice Test
• District of Columbia Hazmat Practice Test
• District of Columbia Class A CDL Practice Test
• District of Columbia CDL Practice Test

Every question traces back to the District of Columbia CDL Manual - skim the right-of-way and signs chapters before your retake.