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The CDL general knowledge test is required to be taken by all CDL applicants. The New Mexico 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 Mexico 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 NM 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. When driving in fog, drivers should:
use high beams.
use the windshield wipers.
use low beams.
2. You should reject a vehicle until which of the following gets rectified?
Faulty headlights
Faulty flashers
All of the above.
3. When you are involved in an accident and not seriously hurt, you need to:
care for the injured.
protect the area and notify authorities.
All of the above.
4. When driving on slippery surfaces, a lack of spray from other vehicles indicates that:
ice has formed on the road.
the pavement is dry.
there is no ice on the road surface.
5. To calculate how much space you should keep in front of you:
count off the seconds until you reach the vehicle ahead.
count off the seconds from when the vehicle ahead of you passes some clear landmark to when you reach that same landmark.
add 4 seconds for each 10 feet of vehicle length at speeds below 40 mph.
6. When preparing to make a right turn, you should NOT turn wide to the left as you start the turn. Why?
A following driver may try to pass you on the right.
Turning wide to the left can cause your vehicle to tilt.
It makes the turn harder.
7. A driver distraction is anything that takes your attention away from driving, such as:
adjusting the radio.
All of the above.
8. Which of the following is checked in a pre-trip inspection?
Wiper blades
Steering wheel
All of the above.
9. The heavier the vehicle:
the more work the brakes must do to stop it.
the less work the brakes must do to stop it.
the higher the center of gravity will be.
10. To test the service brake:
gently try to pull forward with the trailer parking brake on, then release the brake.
push the brake pedal firmly while going about 5 mph.
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
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NM CDL Practice Test

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