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The CDL general knowledge test is required to be taken by all CDL applicants. The New Hampshire 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 Hampshire 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 NH 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 service brake system:
applies and releases the brakes when you use the brake pedal during normal driving.
applies and releases the emergency brake.
applies and releases the parking brakes.
None of the above.
2. Retarders:
improve gas mileage.
help slow a vehicle, reducing the need for using brakes.
reduce braking distance.
reduce the danger of slipping.
3. Controlled braking:
involves pumping the brakes while keeping steering wheel movements very small.
involves locking the wheels and then releasing the brakes.
must be used when you need to turn sharply while braking.
can be used to keep your vehicle in a straight line and allow you to turn if necessary.
4. Suspension systems:
specify the loaded weight of a single vehicle.
have a minimum weight rating.
have a weight capacity rating.
are rated for the maximum weight the vehicle can pull.
5. Distracted driving can cause accidents. To avoid distractions while on the road, you should:
turn off all communication devices.
limit the use of your mobile phone to the first hour of driving.
plan your route while driving only if there are no cars around you.
smoke, eat, and drink only when traffic conditions allow.
6. When shifting up, you should release accelerator, push in clutch and shift to neutral at the same time, and then?
Push in the clutch again
Release the clutch
Shift up
Press the accelerator
7. When you discover a fire, if the trailer doors are hot you should not open them because:
with air many fires do less damage.
opening the doors lets air in and may make the fire flare up.
the temperature of the trailer should not be changed in any way.
you should use the fire extinguisher on the door.
8. Brakes out of adjustment can cause the other brakes to:
overheat and fade.
work better.
apply more braking power.
last longer.
9. If there is a fire in your vehicle, do NOT:
park in an open area.
park away from buildings and other vehicles.
pull into a service station.
notify emergency services.
10. Wheel rims that have had welding repairs:
should not be used.
should be placed in the front.
are safe.
None of the above.
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NH CDL Knowledge Test

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