More CDL Practice Questions
11 free sample cdl questions covering several smaller topics, with the correct answer, a full explanation, and a source reference for each. Want to test yourself instead of just reading the answers? Find your state's free practice test.
1. What does the "GOAL" technique stand for when backing a commercial vehicle?
GOAL stands for "Get Out And Look" — physically checking the area behind the vehicle before and during a backing maneuver.
Source: National: FMCSA (49 CFR)
2. What is a safety consideration when parking a commercial vehicle on or near a hill?
Using wheel chocks along with the parking brake provides a backup against rolling that the parking brake alone might not fully prevent on a grade.
Source: National: FMCSA (49 CFR)
3. Why does a commercial vehicle’s fire extinguisher need to be properly rated and charged, not just present?
Different fire types require different extinguisher ratings, and an expired or undercharged unit may simply fail when actually needed.
Source: National: FMCSA (49 CFR)
4. What should a driver generally avoid doing if a vehicle fire starts in the engine compartment?
Opening the hood on an engine fire can introduce more oxygen and make the fire worse, so it should generally be avoided.
Source: National: FMCSA (49 CFR)
5. What does it mean when a commercial vehicle or driver is placed "out of service"?
An out-of-service order means an inspector found a defect or violation serious enough that the vehicle or driver may not continue operating until it is fixed.
Source: National: FMCSA (49 CFR)
6. What can happen if a driver is found to have violated hours-of-service limits during a roadside inspection?
A driver found in violation of hours-of-service limits can be placed out of service on the spot until the required off-duty time has accumulated.
Source: National: FMCSA (49 CFR)
7. What does an out-of-service sticker placed on a vehicle during an inspection indicate?
An out-of-service sticker means the vehicle is prohibited from operating at all until the defects that triggered it are repaired and verified.
Source: National: FMCSA (49 CFR)
8. Under federal rules, how far from the nearest rail must certain commercial vehicles (such as buses and HazMat-placarded vehicles) stop at a railroad crossing?
Federal rules require certain commercial vehicles to stop between 15 and 50 feet from the nearest rail at a railroad crossing.
Source: National: FMCSA (49 CFR)
9. Which commercial vehicles are federally required to stop at railroad crossings, even without a stop sign present?
Federal rules single out passenger-carrying buses and HazMat-placarded vehicles as required to stop at railroad crossings, regardless of posted signs.
Source: National: FMCSA (49 CFR)
10. When approaching a railroad crossing without gates or flashing signals, what should a commercial driver do?
Without gates or flashing signals, a driver must slow down and actively look and listen in both directions before crossing.
Source: National: FMCSA (49 CFR)
11. Why should a driver avoid shifting gears while crossing railroad tracks in a manual-transmission commercial vehicle?
Shifting gears while crossing risks a stall, which is especially dangerous with a train crossing directly ahead.
Source: National: FMCSA (49 CFR)