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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.
Traction is:
the maximum safe weight a tire can carry at a specified pressure.
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friction between the tires and the road.
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friction between the front and rear tires.
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the distance your vehicle will travel while you
are braking.
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2.
Before each trip, you must make sure the truck is not overloaded and the cargo is balanced and secured properly. Hard steering can be caused by:
too little weight on the driving axles.
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under loaded front axles.
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high center of gravity.
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too much weight on the steering axles.
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3.
With a dual air brake system:
each system has its own air tanks, hoses and lines.
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one system is the main braking system while the other is a back-up system.
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each system shares air tanks.
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each system shares the same lines and hoses.
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4.
If you are feeling drowsy behind the wheel, the only safe cure is to:
pull off the road and get some sleep.
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drink a cup of coffee.
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open your windows, allowing fresh air inside your vehicle.
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drink energy drinks.
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5.
You are driving on a two-lane road. If an oncoming driver has drifted into your lane:
you should brake as hard as you can.
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you should downshift.
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a move to your right is best.
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a move to your left is best.
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6.
ABS malfunction lamps are located:
under the hood.
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on the instrument panel.
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on the driver'door.
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None of the above.
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7.
Before transporting sealed loads, you should check that:
the load is properly secured.
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the seal numbers match the placard numbers.
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the load can be inspected.
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All of the above.
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8.
When driving at night, you should use ________ when you can.
emergency flashers
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indicator lights
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low beams
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high beams
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9.
What should you do if you doubt you have safe space to pass under a low bridge?
Go slowly, and take another route if you are not sure you can make it.
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If no warnings are posted, assume there is enough clearance under the bridge and proceed slowly.
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Assume that the height posted at the bridges is correct.
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Increase the weight of your vehicle to clearing under the bridge.
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10.
Containerized loads:
should exceed gross weight and axle weight limits.
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must be inspected before and after the trip.
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are generally used for freight carried part way by rail or ship.
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All of the above.
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