Free, full New Hampshire 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.
The 30-minute rest break rule requires property-carrying drivers to take a break after how many hours of driving time?
C. 8 hours — Drivers using the 60/70-hour rule must take a 30-minute rest break after driving for 8 cumulative hours without at least a 30-minute interruption. The break can be off-duty or sleeper berth time.
CDL safety scenario 42: Why does liquid surge make tanker driving harder?
A. The moving liquid can push the vehicle after you brake or turn — The moving liquid can push the vehicle after you brake or turn. Commercial drivers are expected to manage this situation before it becomes a crash risk. The CDL manual emphasizes controlling the vehicle, inspecting safety-critical systems, and correcting hazards promptly.
What is a 'defect correction' entry on a DVIR (Driver Vehicle Inspection Report)?
B. Written documentation by the motor carrier that all reported defects have been repaired or that no repair was necessary before the next driver certifies the vehicle as safe — Before the next driver can sign the DVIR to accept the vehicle, the motor carrier must certify that defects reported on the previous DVIR were repaired (or were not safety hazards requiring repair). This is the 'defect correction' entry.
Sleeper berth time can be split into two periods as long as:
D. One period is at least 7 hours and the other at least 2 hours, totaling 10 — The sleeper berth split provision allows one period of at least 7 hours and another of at least 2 hours, totaling at least 10 hours.
When a vehicle is following you too closely, the best response is to:
A. Increase your following distance from the vehicle ahead and avoid sudden moves — Opening more space ahead lets you brake gently and gives the tailgater more room, lowering the chance of a rear-end crash.
What is the primary hazard of a partially filled tanker compared to a full or empty tanker?
B. More liquid surge due to free liquid movement in the tank — A partially filled tanker has free liquid that can surge violently. A full tank has no room to surge, and an empty tank has no liquid. The half-full condition is most dangerous.
What is a 'converter dolly' used for?
B. To connect a second semitrailer to a lead trailer, forming a double combination — A converter dolly is a set of one or two axles with a fifth wheel, used to convert a semitrailer into a full trailer. It connects two trailers to make a double (B-train) combination.
While on the road, you should inspect your vehicle and cargo:
B. Periodically — checking tires, cargo, and securement during stops — En-route checks at stops catch developing tire, cargo, and securement problems before they cause a breakdown or spilled load.
When should a CDL driver use stab braking on a vehicle without ABS?
B. In emergency stops — apply full pressure until the wheels lock, release, and reapply — Stab braking is an emergency technique for vehicles without ABS: apply brakes fully until wheels are about to lock, release until wheels roll freely, then reapply. Releasing prevents complete lockup and maintains steering control.
During the engine compartment check, you should verify the levels of:
B. Engine oil, coolant, and power steering fluid — Checking oil, coolant, and power steering fluid levels helps catch low fluids that could cause engine or steering failure on the road.
The New Hampshire 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.