Alabama CDL Practice Test (AL) 2026

4.7 out of 5 (132 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Are you gearing up to get your Alabama CDL? Great news! You're in the right place to begin with our Alabama CDL Practice Test. This is not just any DMV practice test; it's your first step towards mastering the skills needed for a commercial driver's license. Our practice test features 20 questions, mirroring the real DMV test. To pass, you'll need to answer at least 16 correctly, but don't worry, we've got you covered with multiple-choice questions, real permit test answers, and handy study aids for those tricky spots. What makes our Alabama CDL practice test stand out? Each question offers immediate feedback with detailed explanations. This way, you're not just memorizing answers; you're understanding the 'why' behind them. This approach deepens your knowledge and prepares you for real-world driving scenarios. Plus, all our questions are sourced from the official CDL driver's manual - the same one the state uses. Rest assured, if it's in the manual, it's fair game for the CDL test. Our drivers practice test doesn't just skim the surface; it dives into essential driving knowledge. Expect to encounter questions on pre-trip vehicle inspection, basic vehicle control, gear shifting techniques (yes, even downshifting), navigating hills and steep downgrades, communication with other drivers, speed control, and even drug and alcohol awareness. Whether you're aiming for a Class A or Class B license, or seeking specific endorsements, this Alaska CDL general knowledge practice test is your starting point. Remember, this general knowledge practice test is designed to reflect the diversity of the real CDL permit test. Each time you take it, you'll face the same set of comprehensive questions, reinforcing your learning and building your confidence. So, get ready to shift gears in your CDL preparation with our Alabama CDL Practice Test - your key to unlocking a successful driving career.
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Sample Alabama CDL Test Questions - General Knowledge

Question 1

Before moving a tank vehicle, what should be true of its valves and manhole covers?

  1. A They should be closed and secured
  2. B They may remain open during daylight
  3. C Only the discharge valves must be open
  4. D They may remain open for short trips

Correct answer: A – They should be closed and secured

The Alabama CDL manual instructs drivers not to operate a tank vehicle with open valves or manhole covers. For a cargo tank containing hazardous material, federal regulations require manhole closures to be closed and secured and liquid-discharge valves to be closed and free of leaks, subject to a limited exception for certain cryogenic-residue tanks. These precautions prevent loss of cargo during transit.

Source: Alabama Commercial Driver License Manual — § 8.1.2, “Check Special Purpose Equipment”, 49 CFR § 177.834(j) – General Requirements

Question 2

Which emergency equipment is required on most commercial power units?

  1. A A flashlight and tire repair kit
  2. B A first-aid kit and wheel chocks
  3. C A fire extinguisher and approved warning devices
  4. D A cellular telephone and tow rope

Correct answer: C – A fire extinguisher and approved warning devices

Alabama’s current vehicle-inspection supplement includes a properly charged, secured fire extinguisher and approved emergency warning devices. Federal regulations require qualifying fire extinguishers and either three bidirectional reflective triangles or an authorized alternative such as fusees. Flame-producing devices are prohibited on certain vehicles carrying flammable or explosive materials.

Source: Alabama CDL Manual Supplement for Modernized Version — § 11M.1.1, “Emergency Equipment”, 49 CFR § 393.95(a), (f)–(g) – Emergency Equipment on All Power Units

Question 3

Which type of vehicle fire may require large amounts of water for cooling?

  1. A A tire fire
  2. B A gasoline fire
  3. C An electrical fire
  4. D An unidentified hazardous-materials fire

Correct answer: A – A tire fire

A burning tire must be cooled, and the CDL manual notes that a large quantity of water may be needed. Water should not be used on an electrical fire because of shock danger or on a gasoline fire because it can spread the flames. If the material is uncertain, especially with hazardous materials, wait for trained firefighters.

Source: Alabama Commercial Driver License Manual — § 2.21.3, “Fire Fighting”

Question 4

At 55 mph, what following interval is recommended for a 30-foot commercial vehicle?

  1. A 3 seconds
  2. B 4 seconds
  3. C 5 seconds
  4. D 6 seconds

Correct answer: B – 4 seconds

The recommended minimum is one second for every 10 feet of vehicle length when traveling below 40 mph. A 30-foot vehicle begins with three seconds. Because 55 mph is above 40 mph, one additional second is added, producing a four-second following interval under good conditions.

Source: Alabama Commercial Driver License Manual — § 2.7.1, “Space Ahead”

Question 5

Which vehicle components should be clean and working so other road users can see you easily?

  1. A Reflectors and marker lights
  2. B Clearance lights and taillights
  3. C Identification lights
  4. D All of these

Correct answer: D – All of these

Reflectors, marker lights, clearance lights, taillights, and identification lights all help make a commercial vehicle visible. Each should be clean and functioning properly. Dirt can reduce reflected or emitted light, while a failed lamp can prevent other road users from recognizing the vehicle’s presence, width, or movement.

Source: Alabama Commercial Driver License Manual — § 2.11, “Other Lights”

Question 6

If vehicle speed doubles, approximately how many times longer is the braking distance?

  1. A Three times
  2. B Two times
  3. C Four times
  4. D Five times

Correct answer: C – Four times

Doubling speed makes braking distance approximately four times longer. For example, increasing speed from 20 mph to 40 mph doubles the speed but quadruples the braking distance. Total stopping distance also includes perception and reaction distance, so drivers must reduce speed early when conditions limit available stopping space.

Source: Alabama Commercial Driver License Manual — § 2.6.1, “Stopping Distance”

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