Free, full Delaware 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 must you do before crossing a state line while transporting hazardous materials?
B. Verify that the HazMat regulations of the state you are entering allow the materials and routing — HazMat routing rules vary by state. Some materials require specific routes or are prohibited on certain roads within specific states. Before crossing state lines with HazMat, verify the destination state allows your specific cargo and chosen route.
A first conviction for driving a CMV while using a controlled substance results in disqualification for at least:
A. One year — A first major offense such as driving under the influence disqualifies a CDL holder from operating a CMV for at least one year.
You should never load a liquid tank completely full because:
A. Liquids expand and need room — Leave outage (empty space) in liquid tanks because liquids expand with temperature changes. A full tank can rupture.
A 34-hour restart allows a driver to:
A. Reset the 60- or 70-hour on-duty total to zero after at least 34 consecutive hours off duty — Taking at least 34 consecutive hours off duty restarts the weekly 60- or 70-hour clock, letting the driver begin a fresh cycle.
The 'applied leakage test' for a combination vehicle should not show more than what pressure loss per minute?
C. 4 psi — With brakes fully applied, a combination vehicle should not lose more than 4 psi per minute. A single vehicle should not lose more than 3 psi. Greater losses indicate dangerous brake system leaks.
If you move a load forward in a trailer, what effect does this have on axle weights?
B. It decreases rear axle weight and increases front axle weight (steer axle and drive axles) — Moving cargo forward shifts weight toward the front of the vehicle, increasing weight on the steer axle and drive axles, and reducing weight on the trailer axle. Weight distribution affects braking, steering, and legal compliance.
A bus driver's number one responsibility is:
D. The safety of the passengers — Passenger safety comes before schedule or any other duty, since the driver is responsible for everyone aboard the bus.
During the applied leakage test, air loss for a combination vehicle should not exceed:
D. 4 PSI per minute — Combination vehicles can leak up to 4 PSI per minute with service brakes applied; single vehicles up to 3 PSI per minute.
Standees on a bus may be allowed only when:
B. There is a legal standee line marked on the floor and the bus is not on a highway — Standees are only allowed behind a standee line marked on the floor (typically behind the front axle). Standing passengers are generally not allowed when the bus is operating on a highway.
What does a 'pintle hook' do in a combination vehicle?
B. Connects the drawbar of a converter dolly or full trailer to the preceding unit — A pintle hook is a heavy-duty hook on the back of a trailer or dolly that connects to the eye (lunette ring) of a drawbar. This is the primary connection point for converter dollies and pup trailers.
The Delaware 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.