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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. You should downshift in advance before:
crossing a bridge.
entering the highway.
starting down a hill or entering a curve.
entering a tunnel.
2. Overloading can have bad effects on all of the following except:
Exhaust system
Speed control
3. Most heavy trucks with manual transmissions require ____ to change gears.
single clutching
triple clutching
double clutching
None of the above.
4. Total stopping distance equals:
Braking distance + viewing distance
Perception distance + reaction distance + braking distance
Perception distance + braking distance
Reaction distance - following distance + braking distance
5. Shaded parts of the road:
will melt before open areas.
will remain icy and slippery after other areas have melted.
usually are not slippery.
usually don't freeze.
6. Key suspension system parts include:
Tie rod
Lock rings
Bearing plates
All of the above.
7. Vehicles must be equipped with emergency equipment, including:
2 battery-operated flashlights.
spare electrical fuses.
a safety valve.
8. Backing is dangerous because:
cargo may fall out.
you cannot see everything behind your vehicle.
you need to back toward the passenger driver side so you can see.
you have to turn the steering wheel toward the direction you want to go.
9. The weight of a truck:
has no effect on stopping distance.
has an impact on stopping distance.
is not as important as the vehicle's center of gravity in determining stopping distance.
None of the above.
10. Which of the following statements is FALSE?
If a tire blows, you should put the brakes on hard to stop quickly.
The other statements are all TRUE.
ABS (Antilock Braking Systems) only activate when wheels are about to lock.
You can almost always turn to miss an obstacle more quickly than you can stop.
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NC CDL Practice Test

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