Free District of Columbia CDL practice tests
Pick a test and start. Every answer is explained, so each question teaches you something. No sign-up needed for the free tests.
Questions built from the federal FMCSA CDL driver manualBuilt from the federal CDL manualFree tests
Open to everyone. Take them as many times as you like.
Start here A quick mixed check
General knowledge Required for every CDL
Air brakes For any vehicle with air brakes
Combination vehicles For Class A: tractor-trailers and doubles
Finish the trail, win 10% off
Score 80% or higher on all 7 free tests to unlock a discount on Premium.
Premium tests
The full exam-style tests. You can read about each one before you upgrade.
General knowledge Required for every CDL
- Test 8Premium
CDL vehicle control test
Steering, speed, space and turns.
15 questionsUnlock - Test 9Premium
CDL seeing and communicating test
Scanning, mirrors, signals and horns.
12 questionsUnlock - Test 10Premium
CDL hazards and emergencies test
Skids, brake failure, fires and escape ramps.
15 questionsUnlock - Test 11Premium
CDL night, weather and mountains test
Fog, ice, hot weather and long downgrades.
15 questionsUnlock - Test 12Premium
CDL cargo and weight test
Securing loads and staying within weight limits.
12 questionsUnlock - Test 15Premium
CDL General Knowledge Rehearsal
A fixed set drawn from every general knowledge topic.
50 questionsUnlock - Test 17Premium
CDL General Knowledge Round 2
Practice questions on general knowledge. Every answer is explained.
32 questionsUnlock - Test 18Premium
CDL General Knowledge Round 3
Practice questions on general knowledge. Every answer is explained.
32 questionsUnlock - Test 19Premium
CDL General Knowledge Round 4
Practice questions on general knowledge. Every answer is explained.
32 questionsUnlock - Test 20Premium
CDL General Knowledge Round 5
Practice questions on general knowledge. Every answer is explained.
32 questionsUnlock - Test 21Premium
CDL General Knowledge Round 6
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 22Premium
CDL General Knowledge Round 7
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 23Premium
CDL General Knowledge Round 8
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 24Premium
CDL General Knowledge Round 9
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 25Premium
CDL General Knowledge Round 10
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 26Premium
CDL General Knowledge Round 11
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 27Premium
CDL General Knowledge Round 12
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 28Premium
CDL General Knowledge Round 13
Practice questions on general knowledge. Every answer is explained.
31 questionsUnlock - Test 29Premium
CDL General Knowledge Long Haul
100 mixed General Knowledge questions in one sitting. A longer session to build focus and stamina.
100 questionsUnlock
Air brakes For any vehicle with air brakes
- Test 13Premium
CDL Air Brakes Rehearsal
The full air brakes knowledge test, all topics.
25 questionsUnlock - Test 30Premium
CDL Air Brakes Round 2
Practice questions on air brakes. Every answer is explained.
25 questionsUnlock - Test 31Premium
CDL Air Brakes Round 3
Practice questions on air brakes. Every answer is explained.
25 questionsUnlock - Test 32Premium
CDL Air Brakes Round 4
Practice questions on air brakes. Every answer is explained.
25 questionsUnlock - Test 33Premium
CDL Air Brakes Round 5
Practice questions on air brakes. Every answer is explained.
24 questionsUnlock - Test 34Premium
CDL Air Brakes Long Haul
50 mixed Air Brakes questions in one sitting. A longer session to build focus and stamina.
50 questionsUnlock
Combination vehicles For Class A: tractor-trailers and doubles
- Test 14Premium
CDL Combination Vehicles Rehearsal
The full combination vehicles knowledge test.
20 questionsUnlock - Test 35Premium
CDL Combination Vehicles Round 2
Practice questions on combination vehicles. Every answer is explained.
19 questionsUnlock - Test 36Premium
CDL Combination Vehicles Round 3
Practice questions on combination vehicles. Every answer is explained.
19 questionsUnlock - Test 37Premium
CDL Combination Vehicles Round 4
Practice questions on combination vehicles. Every answer is explained.
19 questionsUnlock - Test 38Premium
CDL Combination Vehicles Round 5
Practice questions on combination vehicles. Every answer is explained.
19 questionsUnlock - Test 39Premium
CDL Combination Vehicles Long Haul
40 mixed Combination Vehicles questions in one sitting. A longer session to build focus and stamina.
40 questionsUnlock
Test-day rehearsal Mixed questions from every part
Study the CDL manual
Read the source the real test is written from, then print a one-page cheat sheet.
District of Columbia CDL rules test
20 questions on District of Columbia's own commercial driver rules: permit timing, testing, age limits and disqualifications. Each answer links back to the official source it came from.
Take the District of Columbia rules test
District of Columbia CDL basics
- A DC commercial driver license is valid for 8 years.
- The CDL general knowledge test is timed at 90 minutes, and each endorsement test at 60 minutes.
District of Columbia can add its own rules on top of the federal manual. Check the official site for District of Columbia Department of Motor Vehicles (DC DMV) before your test. DMVZone is not affiliated with any state agency.
Official source: CDL driver information