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The CDL general knowledge test is required to be taken by all CDL applicants. The New Jersey CDL test consists of 50 questions. To pass, you must correctly answer at least 40 questions (80%). The general knowledge test covers the contents of the New Jersey CDL Manual. All CDL applicants (Class A, B and C) must study the following sections: Driving Safely, Transporting Cargo Safely, Air Brakes (if you plan to operate vehicles equipped with air brakes), Vehicle Inspection Test, Basic Control Skills Test, Road Test. In addition, the Class A CDL test will include questions based on the Combination Vehicles section. Take this CDL practice test now to prepare for the actual NJ general knowledge test! To get your CDL, you must pass both the knowledge and skills tests. CDL knowledge tests include: General Knowledge, Passenger Transport, Air Brakes, Combination Vehicles, Hazardous Materials, Tanker Vehicles, Doubles/Triples, School Bus, Firefighter. Depending on what class of license (A, B or C) and endorsements you need, you must take one or more knowledge tests. A special endorsement is also required to drive certain types of vehicles. The following endorsements may be used with a Class A, B or C CDL: HazMat (H), Tank Vehicles (N), Tank Vehicles Transporting Hazardous Materials (X) and Passenger Transport (P). The School Bus endorsement (S) is only available for Class A or B CDL, and the Doubles/Triples endorsement (T) is only available for Class A driver's licenses.
1. Brake fade results from:
excessive wear.
excessive speeding.
excessive smoke.
excessive use of the service brakes.
2. Distracted driving may be caused by _________ while driving.
listening to music
maintaining constant speed
All of the above.
3. When you check your tires, you should look for all of the following EXCEPT:
Tires from different manufacturers
Dual tires that come in contact with parts of the vehicle
Tread separation
Mismatched sizes
4. Tar in the road pavement often rises to the surface in very hot weather. Spots where the tar "bleeds":
have good traction.
will cause your vehicle to slide back and forth.
will help you get better gas mileage.
are very slippery.
5. You, as a driver, are NOT responsible for:
making sure the truck is not overloaded.
inspecting the cargo.
ensuring the freshness of sealed cargo.
making sure that cargo is properly secured.
6. You should downshift:
before starting up a hill.
before exiting a curve.
before starting down a hill or entering a curve.
None of the above.
7. Which of the following is NOT checked in a pre-trip inspection?
The amount of fuel in the vehicle
Safety equipment
Cargo securement
Brake controls
8. Which of the following is NOT a hazard?
Work zones
A freeway/highway exits that go downhill
An escape ramp
A cardboard box on the road
9. Hazardous materials placards are:
Signs put on top of a vehicle that identify the hazard class of the cargo.
Signs put on the outside of a vehicle that identify the hazard class and weight of the vehicle.
Signs put on the outside of a vehicle to warn others of hazardous materials.
None of the above.
10. To test your hydraulic brakes for leaks:
pump the brake pedal three times, then hold it down for five seconds.
apply firm pressure to the brakes for five seconds, then pump them three times.
turn off the engine and and listen for leaks.
None of the above.
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NJ CDL Practice Test

Number of questions: 50
Correct answers to pass:40
Passing score:80%
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