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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. Empty vans are:
higher than fully loaded ones.
lower than fully loaded ones.
the same height as fully loaded ones.
2. When should you be particularly careful about high winds?
When going downhill
When emerging from a tunnel
When driving at night
3. Cargo should be properly covered:
to protect the weather from the cargo.
to block your view or someone else’s.
to protect people from spilled cargo.
4. The 2 special conditions where you should downshift are:
While going down hill and after finishing a curve.
Before starting up a hill and before finishing a curve.
Before starting down a hill and before entering a curve.
5. Commercial motor vehicles:
should have a properly charged and rated fire extinguisher and other emergency equipment.
are not required to have a fire extinguisher if they already have reflective warning triangles and other emergency equipment.
are only required to have a fire extinguisher when transporting hazardous materials.
6. The most important way to see the sides and rear of your vehicle is to:
look out the window.
get out and walk around the vehicle.
check your mirrors regularly.
7. When driving through a construction zone, you should:
watch for pavement drop-offs.
turn on your parking lights.
maintain your speed, unless there are people working on or near the roadway.
8. Before you back into an area, you should __________ overhanging hazards like trees, branches or electric wires.
get out of the vehicle and check for
check your mirrors to be aware of
ask someone else to check for
9. Black ice:
is thick enough that it makes the road look dry.
is thick enough that it makes the road look wet.
is a thin layer that is clear enough that you can see the road underneath it.
10. When taking a curve you should:
brake in the curve to avoid to locking the wheels.
slightly exceed the posted speed limit for the curve, as this will help you keep control.
be in a gear that will let you accelerate slightly in the curve.
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CDL Knowledge Test AZ

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