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The CDL general knowledge test is required to be taken by all CDL applicants. The Alabama 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 Alabama 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 AL 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. Weaving across the road or drifting from one side to another is typical of:
impaired drivers.
confused drivers.
slow drivers.
2. When feeling fatigued you should:
drink a cup of coffee.
continue driving.
increase your speed to get to your destination faster.
stop and rest.
3. Tar in the road pavement:
does not affect the road surface.
increases the ability to maintain traction on a vehicle.
can slow down your vehicle.
frequently rises to the surface in very hot weather.
4. You had to drive onto the right shoulder to avoid a crash. You are now driving at 40 mph on the shoulder. How should you move back onto the pavement?
Keep moving at the present speed and steer very gently back onto the pavement.
If the shoulder is clear, stay on it until your vehicle has come to a stop, then move back onto the pavement when it is safe.
Brake hard to slow the vehicle, then steer sharply onto the pavement.
None of the above.
5. When inspecting brakes, you should look for:
shoes worn dangerously thin.
cracked drums.
pads with oil, grease, or brake fluid on them.
All of the above.
6. Which of the following is a common cause of fire?
Short circuits due to loose connections.
Improperly sealed cargo.
Under-inflated tires and duals that touch.
All of the above.
7. When shifting down, after releasing the clutch for the first time you should:
brake gently.
press the accelerator.
shift to the lower gear.
push in the clutch again.
8. Federal, state, and local regulations for commercial vehicles:
do not apply to CMV's operated in intrastate commerce.
only apply to CMV's operated in interstate commerce.
only apply to US residents.
vary from place to place.
9. The height of the vehicle's center of gravity:
is very important for safe handling.
should only be a concern when driving a vehicle.
should only be a concern when driving in high winds.
should only be a concern when loading a vehicle.
10. If a load is 50 feet long, the minimum number of tie-downs required is:
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AL CDL Knowledge Test

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