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 NJ-CDL questions are organized by exam domain, so you can see how each part of the New Jersey CDL Permit Test blueprint is tested. Reveal the answer and explanation under each question.
A 70-foot combination vehicle is traveling 45 mph on dry pavement. The driver counts a 6.5-second gap to the vehicle ahead. Using the CDL rule of 1 second per 10 feet of vehicle length, plus 1 additional second above 40 mph, what adjustment is required?
Correct answer: C - Increase the gap to at least 8 seconds
A 14-foot, 12,000-pound rectangular crate is not blocked or braced against forward movement on a flatbed. Each tiedown will pass over the crate and anchor on opposite sides, so its full working load limit counts. Which securement plan meets both the minimum tiedown count and aggregate working load limit?
Correct answer: A - Three tiedowns rated at 2,500 pounds each
On a long downgrade, a driver selects 40 mph as the safe speed and uses snub braking. After a firm brake application produces a definite slowdown, which technique is correct?
Correct answer: D - Release near 35 mph and let speed return to 40
At highway speed, a steering-axle tire blows and the truck pulls sharply. Which immediate response best preserves control?
Correct answer: B - Hold the wheel firmly; ease off the accelerator and do not brake yet
Cargo was inspected and found secure at mile 50. Since that check, the truck has traveled 155 miles in 2 hours and 20 minutes, and the driver has not taken a break. When is the next securement inspection due?
Correct answer: B - Now, at the next safe place to stop
During startup, the ABS warning lamp remains on after the normal self-check, but the service brakes respond normally. What does this most accurately indicate?
Correct answer: D - Service brakes may work, but ABS may not
While crossing standing water at about 35 mph, the steering suddenly feels light and the tires stop responding normally. Which action is most appropriate?
Correct answer: A - Ease off the accelerator and keep steering steady without braking
With the wheels chocked and the air system fully charged, a driver performs a static leakage test on a combination vehicle. After the pressure stabilizes, the engine is off, the parking brakes are released, and the service brake is not applied. The gauges lose 3.5 psi in one minute. How should the result be interpreted?
Correct answer: C - Fail; static loss exceeds 3 psi in one minute
During an air-brake inspection of a dual system, the low-air warning activates at 56 psi, the parking-brake controls pop out at 35 psi, and pressure builds from 85 to 100 psi in 44 seconds at governed operating rpm. What is the overall result?
Correct answer: D - Pass; all three results meet the CDL limits
Pulling out the red, eight-sided control knob on a tractor-trailer does what?
Correct answer: A - Cuts trailer air supply and applies its emergency brakes
The NJ-CDL exam also covers these domains. Drill them in the full free practice test:
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