New Jersey General Knowledge CDL Prep Test (NJ) 4

5 out of 5 (105 votes)
80% Passing score
20 Questions
4 Mistakes allowed
As a New Jerseyan preparing for your CDL in 2026, understanding the specific driving laws and regulations of our state is crucial. That's exactly what our fourth New Jersey CDL practice test offers. With 20 carefully selected DMV written test questions, this CDL prep test provides an in-depth look into the unique road rules and signage you'll encounter on New Jersey's roads. Each driving test question is crafted to reflect the real challenges you'll face on the actual DMV test in 2026, offering a true-to-life experience. What sets our New Jersey CDL prep test apart is the relaxed, no-pressure environment it fosters. We understand that preparing for your CDL can be stressful, and our goal is to ease this stress. The NJ CDL practice test is designed to be a tool for learning and confidence-building, rather than a hurdle. You can take it multiple times, ensuring you're thoroughly prepared for every question type and scenario. Moreover, our NJ DMV CDL prep test mirrors the actual 2026 DMV written test not just in content, but also in format. You'll find yourself navigating through driving test questions and answers that are similar in style and complexity to what you'll face on test day. This level of similarity is invaluable in helping you get comfortable with the CDL test structure and question formats. Remember, to pass, you need to correctly answer at least 16 out of the 20 sample permit test questions. But don't worry, the consistent question set means you can retake the CDL practice test as many times as you need to feel confident and ready. In summary, our fourth New Jersey-specific CDL practice test is more than just a set of sample written test questions; it's a comprehensive preparation tool tailored to your state, designed to provide a stress-free learning experience, and crafted to closely resemble the actual 2026 DMV written test. Prepare with us, and you'll be navigating New Jersey roads with your CDL in no time!
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Sample New Jersey CDL Test Questions - General Knowledge

Question 1

What is the main safety benefit of an antilock braking system?

  1. A It permits higher speeds and shorter following distances
  2. B It prevents every type of skid
  3. C It always reduces stopping distance
  4. D It helps prevent wheel lockup and maintain control during hard braking

Correct answer: D – It helps prevent wheel lockup and maintain control during hard braking

ABS helps prevent wheel lockup during hard braking, allowing the driver to maintain better vehicle control. It may help the driver steer around an obstacle and avoid skids caused by overbraking. ABS does not necessarily shorten stopping distance and cannot compensate for defective or poorly maintained brakes.

Source: New Jersey Commercial Driver’s License Manual — § 2.18.4, “How ABS Helps You”

Question 2

Before making a permitted right turn at a red signal, what must a driver do?

  1. A Slow down but continue moving if the intersection appears clear
  2. B Sound the horn to warn pedestrians
  3. C Wait until another vehicle completes the same turn
  4. D Come to a full stop, observe traffic, and yield as required before turning

Correct answer: D – Come to a full stop, observe traffic, and yield as required before turning

In New Jersey, a right turn at a red signal is permitted unless an official sign prohibits it. The driver must first come to a full stop, observe traffic in all directions, and yield to traffic traveling in the direction of the turn. The driver must also remain stopped for pedestrians crossing the roadway into which the vehicle is turning.

Source: N.J.S.A. § 39:4-115(b) — Making right or left turn

Question 3

Which condition is a suspension-system defect?

  1. A A leaking shock absorber
  2. B An underinflated tire
  3. C A loose wheel lug nut
  4. D A cracked brake drum

Correct answer: A – A leaking shock absorber

New Jersey’s CDL manual lists leaking shock absorbers among the suspension defects a driver should look for during a vehicle inspection. Tire pressure, wheel fasteners, and brake drums must also be inspected, but they belong to other vehicle systems. A leaking shock absorber indicates a suspension problem that requires attention.

Source: New Jersey Commercial Driver’s License Manual — § 2.1.3, “What to Look For”

Question 4

What is the minimum tread depth for a front tire on a commercial truck or bus?

  1. A 2/32 inch
  2. B 4/32 inch
  3. C 6/32 inch
  4. D 1/4 inch

Correct answer: B – 4/32 inch

A front tire on a bus, truck, or truck tractor must have at least 4/32-inch tread depth when measured at any point on a major tread groove. Other tires generally require at least 2/32 inch. A tire also may not have body-ply or belt material exposed through its tread or sidewall.

Source: New Jersey Commercial Driver’s License Manual — § 2.1.3, “What to Look For”, 49 CFR § 393.75(a)–(c) — Tires

Question 5

Using the recommended reduction for wet pavement, about how fast should you travel when the posted limit is 55 mph?

  1. A 45 mph
  2. B 55 mph
  3. C 35 mph
  4. D 30 mph

Correct answer: C – 35 mph

The New Jersey CDL manual advises reducing speed by about one-third on a wet road and gives 55 mph to approximately 35 mph as its example. Wet pavement can double stopping distance because traction is reduced. This is an approximate safety adjustment; the actual speed may need to be lower when water, visibility, traffic, or other conditions worsen.

Source: New Jersey Commercial Driver’s License Manual — § 2.6.2, “Matching Speed to the Road Surface”

Question 6

When possible, how should you position a commercial vehicle when parking?

  1. A Where the inspection area is closest
  2. B So you can pull forward when leaving
  3. C So backing will be limited to 10 feet
  4. D As close as possible to the entrance ramp

Correct answer: B – So you can pull forward when leaving

The New Jersey CDL manual recommends parking so that you can pull forward when you leave. Backing is dangerous because the driver cannot see everything behind a commercial vehicle. If backing cannot be avoided, inspect the path, use both mirrors, move slowly, and use a helper when possible.

Source: New Jersey Commercial Driver’s License Manual — § 2.2.4, “Backing Safely”

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