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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. The Gross Combination Weight (GCW) is:
the weight of the trailer and cargo.
the weight of the vehicle, trailer, and cargo.
the weight of the vehicle and its trailer(s).
the total weight of a single vehicle including its load.
2. At highway speeds, good drivers look at least _______ ahead.
1/2 feet
1/4 mile
150 feet
1 mile
3. If confronted by an aggressive driver, you should:
make gestures.
ignore gestures
try to stay in front of them.
react to gestures.
4. Which of the following statements about driving in slippery conditionsĀ is NOT true?
The roads are most slippery in the first half hour after it starts to rain.
Wet ice is more slippery than ice that is not wet.
When the temperature drops, bridges will freeze before the road will.
As the temperature rises to the point where ice begins to melt, the road becomes less slippery.
5. When making a turn you should:
make gestures to get the attention of other drivers.
turn the signal off before entering the turn.
honk your horn.
signal early.
6. Which of the following statements about engine belts and driving in hot weather is true?
You can check v-belt tightness by pressing on the belts.
Loose belts will result in overheating.
Loose belts will not turn the water pump and/or fan on properly.
All of the above.
7. Texting is:
safer than talking on a cell phone.
about as safe as adjusting the radio.
the most dangerous distraction.
safer thanĀ  engaging in conversation with a passenger.
8. The safety valve installed in the first tank the air compressor pumps air is set to open:
at 30 psi.
if there is too little pressure.
every 15 minutes.
if there is too much pressure.
9. The most important hand signal you should agree on with a helper is:
Keep backing
10. How many reflective triangles/emergency reflectors should you carry?
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CDL Knowledge Test NC

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