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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. When changing lanes, you should:
do it quickly.
not use your turn signals.
None of the above.
2. You hear a loud "bang" which sounds like a tire blowout. You should:
check the tires at the next stop.
assume you have a tire failure.
keep driving as normal.
3. To determine a safe speed for a downgrade, you should consider:
The total weight of the vehicle and cargo.
Trip origin and destination city.
Oncoming traffic.
4. Brake fade results from:
excessive speeding.
excessive use of the service brakes.
excessive wear.
5. Two of the most common causes of tire fires are:
Loose lug nuts and duals that touch.
Driver smoking and bleeding tar.
Duals that touch and under-inflated tires.
6. Before unloading explosive materials, you should:
connect heater power sources.
turn your engine off.
keep the engine running.
7. Traction is:
the distance your vehicle will travel while you are braking.
friction between the front and rear tires.
friction between the tires and the road.
8. HAZMAT placards are:
regulatory signs
speed signs
warning signs
9. If your vehicle gets stuck on a railroad track, you should:
try to re-start the vehicle.
stay in the vehicle and call for help.
get out of the vehicle and walk as far away from the tracks as possible.
10. Hanging meat in a refrigerated truck:
will not affect safe driving ability.
can be a very unstable load.
should never be transported.
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AZ CDL Practice Test

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