10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
These 10 free DE-CDL questions are organized by exam domain, so you can see how each part of the Delaware CDL Permit Test blueprint is tested. Reveal the answer and explanation under each question.
On a wet downgrade, a tractor's drive wheels lock during hard braking. The rear of the tractor begins sliding right while the trailer remains nearly straight. Which response gives the driver the best chance of preventing a jackknife?
Correct answer: C - Release braking to restore wheel roll, countersteer smoothly, then use controlled braking
A 60-foot combination is traveling at 48 mph on a dry, level highway. Using the standard CDL following-distance rule before adding any extra margin for conditions, what is the minimum interval?
Correct answer: D - 7 seconds
A 21-foot boxed article weighing 8,000 pounds is not blocked or braced against forward movement. Each proposed arrangement would meet the aggregate working-load-limit requirement. Under the general minimum rule, how many tiedowns are required?
Correct answer: A - 4
During the applied air-loss test on a tractor-semitrailer, pressure falls from 118 psi to 113 psi in one minute while the service brake is held fully applied. How should the result be evaluated?
Correct answer: A - Fail: the 5-psi loss exceeds the 4-psi combination limit
A driver completes a gentle tug test and the trailer does not move. The visual check then shows a small gap between the trailer apron and fifth wheel, and the locking jaws are around the kingpin head rather than the shank. What is the correct conclusion?
Correct answer: D - The trailer is falsely coupled and must be recoupled before travel
A double will use one loaded trailer weighing 31,000 pounds and one weighing 18,000 pounds. Axle limits will be legal in either arrangement. How should the units be positioned?
Correct answer: C - Place the 31,000-pound trailer immediately behind the tractor
A passenger bus approaches a drawbridge controlled by a traffic signal. The light is green, the span is visibly closed, and no attendant is directing a stop. Which approach is proper?
Correct answer: C - Slow, verify the bridge is safe, and proceed without a mandatory full stop
A half-full smooth-bore tanker is approaching a signal that has just turned red. What driving technique best controls the load's strongest expected surge?
Correct answer: B - Brake early and smoothly, then hold steady pressure after stopping
A vehicle is loaded with 20 pounds of Division 2.3 poison gas in non-bulk packages. No other hazardous material is aboard. Which placarding decision is required?
Correct answer: B - Display the POISON GAS placard
At a school-bus stop, a student drops a phone beside the right front wheel and bends down to retrieve it. The driver can still see the student in the crossover mirror. What should happen next?
Correct answer: A - Keep the bus secured; direct the student to a safe visible place and resolve the hazard before moving
The DE-CDL exam also covers these domains. Drill them in the full free practice test:
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