Alabama Double CDL Test 1 - DMV Exam Practice

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Question 1 of 20

1. Question
On low bridges:
- Height warnings must always be posted.
- Height warnings must be posted at least twice.
- Height warnings may be posted, but do not have to be.
- Height warnings are often, but not always, posted on low bridges. If you are unsure if you will be able to clear an overhead object, go slowly.
Correct

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Question 2 of 20

2. Question
What is a shut-off valve?
- A device that prevents air from escaping an air brake system
- The ignition switch
- An object connected to the spring brake system
- A coupling device
Correct

Shut-off valves are used in air supply lines to control the passage of air from one trailer to another. The rear shut-off valve should always be closed to prevent air from leaving the braking system.

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Shut-off valves are used in air supply lines to control the passage of air from one trailer to another. The rear shut-off valve should always be closed to prevent air from leaving the braking system.
Question 3 of 20

3. Question
If another driver is following you too closely, you should do all of the following, except:
- Avoid quick changes.
- Increase the distance between you and the vehicle in front of you.
- Speed up.
- Avoid relying on tricks to help others pass.
Correct

If you are being followed too closely, you should increase your following distance, avoid making quick moves, and avoid relying on tricks (such as flashing your lights) to help other drivers pass. Speeding up may only increase the danger by causing the tailgater to continue tailgating you at a higher speed.

Incorrect

If you are being followed too closely, you should increase your following distance, avoid making quick moves, and avoid relying on tricks (such as flashing your lights) to help other drivers pass. Speeding up may only increase the danger by causing the tailgater to continue tailgating you at a higher speed.
Question 4 of 20

4. Question
If you don’t pull the dolly out from beneath the rear trailer before unlocking the pintle hook:
- The tow bar may cause injury.
- The landing gear may break.
- The pintle hook may detach.
- Nothing bad could happen.
Correct

Never unlock the pintle hook with the dolly still under the rear trailer. This could cause the dolly tow bar to fly up, possibly causing serious injury.

Incorrect

Never unlock the pintle hook with the dolly still under the rear trailer. This could cause the dolly tow bar to fly up, possibly causing serious injury.
Question 5 of 20

5. Question
When driving with trailers, you should:
- Make quick, sudden changes.
- Avoid making sudden moves.
- Accelerate by pushing the accelerator to the floor.
- To reduce the risk of tipping over when driving with a trailer, you should steer gently and smoothly. Avoid making sudden movements.
Correct

Incorrect
Question 6 of 20

6. Question
____ are the cause of more than half of all accident-related truck driver deaths.
- Truck rollovers
- Motorcycles
- Slippery roads
- Pedestrians
Correct

More than half of all accident-related truck driver deaths are a result of truck rollovers. To help prevent a rollover, be sure to load cargo low to the ground and centered on your rig. Take corners slowly and carefully.

Incorrect

More than half of all accident-related truck driver deaths are a result of truck rollovers. To help prevent a rollover, be sure to load cargo low to the ground and centered on your rig. Take corners slowly and carefully.
Question 7 of 20

7. Question
A truck should be parked:
- So that it must be backed up to leave the space.
- So that it can be pulled forward to leave the space.
- On the grass.
- Because you can't see everything behind you, backing is always dangerous and should be avoided whenever possible. Choose parking spaces from which you can pull forward when you leave.
Correct

Incorrect
Question 8 of 20

8. Question
Both systems in a dual air brake systems share:
- Air tanks.
- Hoses.
- Air lines.
- An air compressor.
Correct

Both systems in a dual air brake system share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.

Incorrect

Both systems in a dual air brake system share a single air compressor. If the air compressor is damaged, neither system will be able to operate properly.
Question 9 of 20

9. Question
Combination vehicles are usually:
- Easier to drive than single commercial vehicles.
- Lighter than single commercial vehicles.
- More difficult to drive than single commercial vehicles.
- Driving combination vehicles requires more skill than driving single commercial vehicles. Combinations are generally longer, generally heavier, and are more vulnerable to rollover.
Correct

Incorrect
Question 10 of 20

10. Question
Driving a combination vehicle ____ than driving a single vehicle.
- Is easier
- Requires more driving skill
- Is better for training
- Is safer in inclement weather
Correct

Driving a combination vehicle usually requires more skill than driving a single vehicle. Combination vehicles are generally longer and heavier than single commercial vehicles.

Incorrect

Driving a combination vehicle usually requires more skill than driving a single vehicle. Combination vehicles are generally longer and heavier than single commercial vehicles.
Question 11 of 20

11. Question
Which of the following is not a part of an air brake system?
- A service brake system
- A parking brake system
- An emergency brake system
- An axle brake system
Correct

Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system.

Incorrect

Air brakes consists of three separate braking systems: the service brake system, the parking brake system, and the emergency brake system.
Question 12 of 20

12. Question
When checking your vehicle’s lights before driving:
- The vehicle should be running and in gear.
- The engine should be turned off.
- The check can be done from inside the vehicle.
- The check can be done by looking at a reflection from a shiny surface.
Correct

To check your vehicle’s lights before a trip, you should set the parking brake, turn off the engine, remove the key from the ignition, and take the key with you. Turn on your low beam headlights and four-way flashers. Get out of the vehicle to make sure the lights are working properly.

Incorrect

To check your vehicle’s lights before a trip, you should set the parking brake, turn off the engine, remove the key from the ignition, and take the key with you. Turn on your low beam headlights and four-way flashers. Get out of the vehicle to make sure the lights are working properly.
Question 13 of 20

13. Question
Hydraulic brakes can fail for one of two reasons. Which of the following is one of those reasons?
- There is a loss of hydraulic pressure.
- You are driving uphill.
- The brakes get too cold.
- The brakes are used too much in one day.
Correct

Most hydraulic brake failures occur for one of two reasons. A first likely cause of brake failure is that the brakes have been overused on a downgrade, causing them to fade. The second likely cause is that there has been a loss of hydraulic pressure in the braking system. Brakes kept in good condition will rarely fail, but you should know which steps to take in case they do.

Incorrect

Most hydraulic brake failures occur for one of two reasons. A first likely cause of brake failure is that the brakes have been overused on a downgrade, causing them to fade. The second likely cause is that there has been a loss of hydraulic pressure in the braking system. Brakes kept in good condition will rarely fail, but you should know which steps to take in case they do.
Question 14 of 20

14. Question
If the safety relief valve in the air brake system releases air:
- The compressor needs more air.
- The air pressure has become too high.
- The brakes are fully operational.
- An air brake system has a safety relief valve, which releases air from the tanks if the pressure gets too high. If the valve must operate, something in the system is wrong and should be addressed by a mechanic.
Correct

Incorrect
Question 15 of 20

15. Question
If hydraulic brakes fail, a driver can reduce their speed by:
- Shifting into a higher gear.
- Shifting into a lower gear.
- Finding a hill.
- Letting the truck run out of gas.
Correct

If your hydraulic bakes fail, shifting into a lower gear can help slow your vehicle down.

Incorrect

If your hydraulic bakes fail, shifting into a lower gear can help slow your vehicle down.
Question 16 of 20

16. Question
Rough acceleration:
- Can damage a vehicle.
- Is necessary to warm up parts of the engine.
- Is encouraged to improve gas mileage.
- Should be done on surfaces with poor traction.
Correct

Accelerate smoothly and gradually. Rough acceleration can cause mechanical damage.

Incorrect

Accelerate smoothly and gradually. Rough acceleration can cause mechanical damage.
Question 17 of 20

17. Question
Steering wheel play of more than ____ can make steering difficult.
- 10 degrees
- 25 degrees
- 50 degrees
- A steering wheel should have no more than 10 degrees of play. This is equal to about two inches of movement at the rim of a 20-inch wheel. If there is more play than this, it may be difficult to steer.
Correct

Incorrect
Question 18 of 20

18. Question
Rims with welding repairs:
- Are not safe to be used.
- Are acceptable to be used on tires on the rear of a vehicle.
- Are acceptable to be used only when carrying a heavy load.
- Wheels or rims that have had welding repairs should never be used.
Correct

Incorrect
Question 19 of 20

19. Question
An application pressure gauge shows:
- How much air pressure is being applied to the brakes.
- How much air pressure is available.
- How much air pressure is required to stop a vehicle.
- If a vehicle is equipped, an application pressure gauge shows how much air pressure is being applied to the brakes. This gauge can help a driver identify if their brakes are beginning to fade.
Correct

Incorrect
Question 20 of 20

20. Question
When starting an engine:
- The brakes will lock up.
- Warning lights should turn on, then quickly turn off.
- Coolant temperatures should decrease.
- After a vehicle is started, the warning lights and buzzers should go out after a few seconds. If the warning signals do not turn off, there may be something wrong with the vehicle.
Correct

Incorrect

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Related FAQs

What is a Class A CDL license in Alabama?

A Class A Commercial Driver’s License (CDL) in Alabama allows you to operate large combination vehicles with a total weight of 26,001 pounds or more, provided the vehicle being towed weighs more than 10,000 pounds. It is commonly used for operating tractor-trailers and similar heavy-duty vehicles.

What vehicles can I operate with a Alabama Class A CDL license?

With a Class A CDL in Alabama, you can drive vehicles like semi-trucks, tractor-trailers, truck and trailer combinations, livestock carriers, flatbeds, and tanker vehicles. You can also operate Class B and Class C vehicles if you have the appropriate endorsements.

What are the requirements to obtain a Class A CDL license in Alabama?

To obtain a Class A CDL in Alabama, you must: (1) be at least 18 years old (21 for interstate driving), (2) hold a valid non-commercial driver’s license, (3) pass a Department of Transportation (DOT) medical exam, (4) get a Commercial Learner’s Permit (CLP), and (5) pass knowledge and road skills tests after completing entry-level driver training (ELDT) from an FMCSA-approved provider.

What is the minimum age requirement for a Class A CDL license in Alabama?

The minimum age to apply for a Class A CDL in Alabama is 18 years old for intrastate driving (within Alabama). To drive across state lines or transport hazardous materials, you must be at least 21 years old.

Do I need any endorsements for a Alabama Class A CDL license?

Yes, depending on the type of vehicle or cargo, endorsements may be needed. Common endorsements for Class A CDL holders include: (T) Double/Triple Trailers, (N) Tank Vehicles, (H) Hazardous Materials, (X) Tanker and Hazmat Combined, and (P) Passenger Vehicles. Each endorsement requires passing additional written tests.

What is involved in the Class A CDL skills test in Alabama?

The Class A CDL skills test in Alabama includes three parts: (1) Pre-trip Inspection to show you understand how to check vehicle safety, (2) Basic Control Skills Test to demonstrate backing, turning, and maneuvering, and (3) Road Test to show safe driving in real-world conditions.

Are there any restrictions or limitations for drivers with a Alabama Class A CDL license?

Yes. Some limitations may apply, especially for drivers under 21, who cannot drive out of state or transport hazardous materials. Also, any medical or legal disqualifications, such as certain convictions, may restrict your CDL.

Can I take the Class A CDL written test in a language other than English in Alabama?

The written test for a Class A CDL in Alabama is generally offered in English. However, some locations may offer it in Spanish. It’s best to check with your local testing center. Keep in mind, the road skills test must be taken in English as per federal law.

Can I request accommodations for the Alabama Class A CDL written test due to a disability?

Yes, Alabama provides accommodations for individuals with disabilities. You must notify the testing center in advance to arrange accommodations such as extra time or alternative testing formats based on documented needs.

What happens if I fail the Class A CDL written test in Alabama? Can I retake it?

If you fail the Class A CDL written test in Alabama, you can retake it. There may be a short waiting period, and a small retest fee may apply. Be sure to study the CDL Manual and practice using online resources before your next attempt.

Pass Your Written Test on the First Try

Getting your driver’s license is a big step, and we’re here to help make it easier. Our free DMV practice tests are designed to simulate the real exam and boost your confidence before taking the actual written knowledge test. Whether you’re applying for a learner’s permit, standard license, or a renewal, our practice exams cover everything you need to know to pass.

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Our questions are based directly on the 2025 state driver’s handbooks and updated regularly. They closely resemble what you’ll see on the actual DMV test.

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Double Test 1

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