Free, full Wisconsin 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.
When driving a tanker through an on-ramp or off-ramp curve, you should:
A. Slow to well below the posted ramp speed because of the high rollover risk — Ramp speeds are set for ordinary vehicles, so a top-heavy tanker should enter well below them to avoid rolling over.
What does a CDL Medical Examiner's Certificate (MEC) prove?
B. That the driver meets the physical qualifications required to operate a CMV under 49 CFR Part 391 — The Medical Examiner's Certificate (Form MCSA-5876) confirms that the driver has been examined by a certified medical examiner and meets the physical qualification standards in 49 CFR Part 391.
Under FMCSA Hours of Service rules, a property-carrying driver may drive a maximum of how many hours after 10 consecutive off-duty hours?
A. 11 hours — Property-carrying drivers may drive a maximum of 11 hours after taking 10 or more consecutive off-duty hours. This is the 11-Hour Driving Limit under FMCSA regulations.
When transporting hazmat and parking temporarily, the vehicle must:
B. Be attended or parked in a safe, legal location — A loaded hazmat vehicle must be attended or parked in a designated safe area. Specific parking rules vary by class of material.
On a hazardous materials shipping paper, the hazard class tells you:
C. The type of danger the material presents, such as flammable or corrosive — The hazard class identifies the kind of risk — flammable, corrosive, poison, and so on — guiding placarding and emergency response.
When you must drive in fog, you should:
B. Slow down, use low beams, and turn on fog lights if you have them — Low beams cut glare off the fog and slowing down gives you time to react, while high beams reflect back and reduce visibility.
Off-tracking means that when a combination vehicle turns, the rear wheels:
C. Follow a shorter path, ending up off to the inside of the turn — In a turn, the trailer's rear wheels cut inside the path of the tractor's front wheels, so you must turn wide to clear curbs and objects.
A tank vehicle (N) endorsement is required to haul liquids or gases in a permanently mounted tank with a capacity of:
C. 1,000 gallons or more, or individual containers of 119 gallons or more totaling 1,000 gallons — The tank endorsement applies to tanks rated 1,000 gallons or more, or aggregated portable tanks meeting that threshold of liquid or gas.
A tanker endorsement is required when the tank capacity is:
D. 1,000 gallons or more — A tanker endorsement (N) is required for vehicles with permanently attached tanks rated at 1,000 gallons or more capacity.
The safety chains on a converter dolly are designed to:
B. Prevent the dolly's drawbar from dropping to the ground if it disconnects from the trailer — Safety chains on a converter dolly are there to keep the dolly's drawbar (tongue) from dragging on the road if it becomes disconnected from the trailer's pintle hook.
The Wisconsin 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.