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The CDL general knowledge test is required to be taken by all CDL applicants. The North Carolina 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 North Carolina 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 NC 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. Regrooved tires:
cannot be used on the rear wheels of buses.
cannot be used on the wheels of buses.
cannot be used on the front wheels of buses.
None of the above.
2. The most common cause of skidding is:
spilled oil.
surface water.
driving too fast for conditions.
black ice.
3. Letting air out of hot tires:
will help relieve the extra pressure.
will cool the tires down.
will have no effect on the tires.
should not be done, because the pressure will be too low when the tires cool off.
4. When a vehicle goes around a corner, the rear wheels:
will lock up.
follow the same path as the front wheels.
follow a different path than the front wheels.
will turn freely.
5. Axle weight is:
the weight of all the axles added together.
the maximum safe weight your tires can carry at a specified pressure.
the value specified by the manufacturer as the loaded weight of one axle.
the weight transmitted to the ground by one axle or one set of axles.
6. To reduce driver distraction, you should do all of the following except:
Adjust mirrors before driving
Pre-program radio stations
Eat while driving.
Plan your route before driving
7. When conducting a pre-trip inspection:
the vehicle inspection report should not be reviewed unless your supervisor tells you to do so.
the inspection report should only be reviewed if you will be carrying passengers.
you should review the last vehicle inspection report.
None of the above.
8. In an emergency, if you have to drive off the road you should:
avoid using the brakes until your speed has dropped.
keep one set of wheels on the pavement, if possible.
stay on the shoulder (if possible) until your vehicle has come to a stop.
All of the above.
9. When steering to avoid a crash, you should:
steer with one hand so that you can turn the wheel more quickly.
apply the brakes while turning.
not turn any more than needed to clear what is in your way.
All of the above.
10. When starting your vehicle, the warning lights and buzzers:
should stay on for 2 minutes.
should stay on until you manually turn them off.
should stay on for 15-20 seconds.
should go out right away.
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NC CDL Practice Test

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