Free, full Virginia CDL general knowledge test practice right here in your browser — real exam format (50 questions, 80% to pass), diagnostic and adaptive modes, spaced-repetition review, and a readiness dashboard. No signup, no paywall — your progress is saved automatically on this device.
What should a driver inspect on the tires during a pre-trip inspection?
B. Tread depth (minimum 4/32" on steering axle, 2/32" on other axles), inflation, and no cuts or bulges — Inspect tires for: minimum tread depth (4/32" on steering axle; 2/32" on other axles), proper inflation (no flat or severely under-inflated tires), and no visible damage (cuts, bulges, exposed cords).
When checking the cab during pre-trip, verify that all mirrors are:
D. Clean, properly adjusted, and not cracked or broken — All mirrors must be clean, properly adjusted for the driver, and free of cracks or damage that would impair visibility.
What is the 'FMCSA Special Configuration' requirement for triples?
B. Triples are federally regulated — they require a combination CDL-A with doubles/triples (T) endorsement — Operating a double or triple trailer combination requires the CDL-A license plus the 'T' (doubles/triples) endorsement, which requires passing an additional knowledge test.
A high center of gravity in a liquid tanker means:
B. It has a higher risk of rollover, especially in curves — Liquid tankers have a higher center of gravity than many other vehicles. This increases rollover risk, particularly when rounding curves or making turns, even when the tank is not full.
During inspection, you should check wheels and rims for:
C. Cracks, damage, and missing or loose lug nuts — Cracked rims and missing or loose lug nuts can cause a wheel to come off, so inspect them carefully before every trip.
The proper way to test your service brakes is to:
C. Drive at 5 mph and apply brakes firmly — Test service brakes by moving forward slowly (about 5 mph) and applying brakes firmly. The vehicle should stop in a straight line.
Before starting down this long, steep grade in a heavy truck, you should:
B. Select a low gear before the descent and use light, intermittent braking — Choose a low gear before the grade so engine braking controls speed, using brief snub braking to avoid overheating the brakes.
Bobtailing (driving a tractor without a trailer) is dangerous because:
D. The rear axles have less traction so stopping takes longer — Bobtailing is dangerous because without a trailer, there is less weight on the drive axles, reducing traction and increasing stopping distance.
When should you use the trailer hand valve (trolley valve)?
D. Only to test trailer brakes — Use the trailer hand valve only for testing trailer brakes. Using it while driving can cause a trailer skid because only the trailer brakes apply.
Hazardous materials a bus may NOT carry as passenger baggage include:
A. Tear gas, explosives, and most other hazardous materials — Buses are barred from carrying most hazardous materials, including explosives and tear gas, to protect the passengers aboard.
The Virginia CDL general knowledge test has 50 questions, and you need 80% to pass — at least 40 correct answers. The practice tests on this page use the same format. The 80% passing score is a federal FMCSA standard used by every state.
80%. You can miss at most 10 of the 50 questions. The readiness dashboard on this page tracks whether you're consistently scoring above that bar.
Yes. Every practice test on this page and everything in the DMVPrep iPhone app is free — no ads, no paywall, no account.
Federal motor carrier safety regulations (FMCSA) — the same rules every state's CDL exam is drawn from. Every question in the DMVPrep app cites the regulation or handbook section it comes from.
Yes — the DMVPrep app includes all 3,745+ questions in Spanish, and the whole app works in Spanish.