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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. If confronted by an aggressive driver, you should:
make gestures.
ignore gestures
react to gestures.
try to stay in front of them.
2. Which of these is FALSE? The spare tire must:
not be damaged.
be the proper size.
be approved by the truck manufacturer.
be properly inflated.
3. When switching gears, if you remain too long in Neutral:
the ABS won't work.
the vehicle will speed up.
the brakes won't work.
you may have difficulty putting the vehicle into the next gear.
4. Your chances of avoiding an accident depend upon how well you take action. When you are about to hit an obstacle ahead, you should remember that:
leaving the road is more risky than hitting another vehicle.
you can almost always turn to miss an obstacle more quickly than you can stop.
stopping is always the safest thing to do in an emergency.
All of the above.
5. Placards must be placed:
on the front only.
on the front, rear and both sides of the vehicle.
on the rear only.
on the driver's side of the vehicle.
6. When checking the steering system for defects, you should look for:
cut or cracked valve stems.
bent, loose, or broken parts, such as tie rods.
loose, broken, or missing tailpipes.
missing or broken leaves in any leaf spring.
7. When only the tractor has ABS:
there is a greater chance of jackknifing.
the ABS won't work.
you should be able to maintain steering control during braking.
the trailer is less likely to swing out.
8. Which of the following is NOT a common cause of vehicle fires?
Flammable cargo
Under-inflated tires
Broken fuel pipe
Headlights out of adjustment
9. When parked on the side of the road, you should:
use the 4-way emergency flashers.
activate the right turn signal.
turn off all lights.
flash your brake lights.
10. Which of the following statements about driving in very hot weather is true?
If a tire is too hot to touch, keep driving to cool it off.
As the temperature of the tire increases, the air pressure of a tire decreases.
You should inspect the tires every 2 hours or every 100 miles.
None of the above.
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AL CDL Knowledge Test

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