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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 your vehicle has power steering, during your pre-trip external inspection you must check that:
there's a function light.
there are 2 lit red lights indicating it's there.
there are no power steering fluid leaks or damage to the power steering hoses.
the engine rpm is down close to idle.
2. If you recognize a distracted driver on the road, you should:
flash your brake lights at them.
give them plenty of room.
follow them closely.
try to pass them.
3. When you have to back, use a helper whenever possible. Before you begin backing, work out a set of hand signals that you both understand. It is especially important to agree on a signal for:
"Get closer"
4. When checking the engine compartment in a vehicle inspection, you should check all of the following except:
Shock absorbers
Coolant level in radiator
Windshield washer fluid level
Engine oil level
5. When your drive wheels have poor traction, you should:
only use the retarder on the front wheels.
turn the retarder on.
only use the retarder on the rear wheels.
turn the retarder off.
6. You should hold your steering wheel:
gently with both hands.
firmly with one hand.
firmly with both hands.
with both hands on the same side of the wheel.
7. Which of these can cause your vehicle to skid?
Over acceleration
Braking any harder than necessary on slippery roads
Over steering
All of the above.
8. The safety valve installed in the first tank the air compressor pumps air is set to open:
at 30 psi.
every 15 minutes.
if there is too little pressure.
if there is too much pressure.
9. Dry bulk tanks require special care because:
are heavier than other CMVs.
they have a high center of gravity.
take up more space than other CMVs.
they have a low center of gravity.
10. _________ is the distance it takes to stop in ideal conditions once the brakes are applied.
Perception distance
Stopping distance
Braking distance
Safe following distance
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AL CDL Practice Test

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