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The CDL general knowledge test is required to be taken by all CDL applicants. The Arizona 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 Arizona 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 AZ 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 height of the vehicle's center of gravity:
should only be a concern when driving a vehicle.
is very important for safe handling.
should only be a concern when loading a vehicle.
2. Which of these is NOT a thing to do when caring for the injured at the scene of a crash?
Keep the injured persons cool.
Move a severely injured person if the danger of fire or passing traffic makes it necessary.
If a qualified person is helping the injured, stay out of the way unless asked to assist.
3. When steering to avoid a crash, you should:
apply the brake while you are turning.
not turn any more than needed to clear the hazard.
lock your wheels while turning.
4. The distance you will continue to travel, in ideal conditions, before you physically hit the brakes in response to a hazard ahead is called:
Braking distance
Perception distance
Reaction distance
5. To prevent drowsiness before a trip, you should:
drink 2 cups of coffee.
drive with the windows rolled down.
avoid medications that cause drowsiness.
6. If your truck catches fire, the first thing you should do is to:
pull into a service station and call for help.
get the vehicle off the road and park near other vehicles.
pull off the road and park in an open area.
7. A low air pressure warning signal:
is required on all vehicles without air brakes.
is required on vehicles with air brakes.
is optional on vehicles with air brakes.
8. What are the two basic reasons for covering cargo?
To protect the cargo from weather and to avoid littering.
To protect people from spilled cargo and the cargo from weather.
To protect people from spilled cargo and the cargo from pilferage.
9. Confused drivers can be very hazardous. Clues to confusion include:
changing lanes for no apparent reason.
All of the above.
10. When crossing or entering traffic with a heavy vehicle:
you can count on other drivers to move out of your way so you can safely enter the flow of traffic.
you may need a much larger gap to enter traffic than you would in a car.
you should allow more room if your vehicle is not loaded.
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AZ CDL Practice Test

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