Arizona CDL General Knowledge Practice Test (AZ) 2

4.9 out of 5 (87 votes)
80% Passing score
20 Questions
4 Mistakes allowed
Venturing into the realm of commercial driving in Arizona requires a solid grasp of core driving knowledge, and our second Arizona General Knowledge Practice Test is tailored to help you achieve just that. This comprehensive 20-question practice exam is a critical tool for reinforcing your command of vital driving principles. It's structured to simulate the real Arizona CDL permit test, featuring multiple-choice questions that span a wide range of topics crucial for every aspiring commercial driver, regardless of whether you're aiming for a Class A or Class B license, or adding specialized endorsements. As you navigate through questions on pre-trip vehicle inspections, vehicle control, gear shifting, and managing various road conditions, you'll find this AZ CDL practice test to be an invaluable resource. The inclusion of visual learning aids, such as diagrams and images depicting road signs and traffic scenarios, caters to those who learn best through visual means. Additionally, you can rely on the accuracy and relevance of the content, as it is regularly updated to reflect the latest in driving laws and regulations for 2026. Our Arizona CDL practice test not only prepares you for handling your vehicle and cargo safely but also ensures you're equipped with the knowledge to respond to emergency situations. It instills a thorough understanding of the importance of communication on the road and the implications of speed control, along with drug and alcohol regulations. With the help of study aids for those trickier questions, you'll find yourself confidently clearing the hurdles of the Arizona CDL general knowledge test.
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Sample Arizona CDL Test Questions - General Knowledge

Question 1

What is the minimum tread depth for a tire on the front wheels of a truck, truck tractor, or bus?

  1. A 4/32 inch
  2. B 2/32 inch
  3. C 7/16 inch
  4. D 3/8 inch

Correct answer: A – 4/32 inch

Federal tire rules require at least 4/32 inch of tread depth in a major tread groove on each front-wheel tire of a bus, truck, or truck tractor. Measurements are not taken at tie bars, humps, or fillets. Most other tire positions require at least 2/32 inch.

Source: Arizona Commercial Driver License Manual — § 2.1.3, “What to Look For—Tire Problems”, 49 CFR § 393.75(b), (c) — Tires

Question 2

Which is one basic reason for covering cargo carried on an open-bed vehicle?

  1. A To prevent cargo theft
  2. B To reduce insurance premiums
  3. C To protect the cargo from weather
  4. D To eliminate the need for securement devices

Correct answer: C – To protect the cargo from weather

The Arizona CDL manual identifies two basic reasons for covering cargo: protecting people from spilled material and protecting the cargo from weather. A cover does not replace required cargo securement. Drivers should also monitor the cover because a loose cover can tear away or obstruct someone’s view.

Source: Arizona Commercial Driver License Manual — § 3.3.4, “Covering Cargo”

Question 3

A yellow diamond sign displaying a black cross symbol warns of what?

This sign warns drivers to _____________.
  1. A A road-work area lasting 1,000 feet
  2. B An intersection ahead where traffic may turn or enter
  3. C An upcoming change in the speed limit
  4. D A stop sign immediately ahead

Correct answer: B – An intersection ahead where traffic may turn or enter

The Cross Road warning sign, designated W2-1, may be installed in advance of an intersection. It alerts drivers to the presence of the intersection and the possibility of turning or entering traffic. Drivers should scan the intersecting roadway and be prepared for traffic conflicts.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways, 11th ed. — § 2C.41, “Intersection Warning Signs (W2-1 through W2-8)”

Question 4

What are the two air lines found on every air-braked combination vehicle?

  1. A Service and emergency
  2. B Service and brake
  3. C Brake and emergency
  4. D Brake and pressure

Correct answer: A – Service and emergency

A combination vehicle has a service line and an emergency line. The service line, also called the control or signal line, carries air controlled by the brake pedal or trailer hand valve. The emergency or supply line fills the trailer air tanks and controls the trailer emergency brakes.

Source: Arizona Commercial Driver License Manual — § 6.2.4, “Trailer Air-lines”

Question 5

Which statement describes a recommended practice for backing a commercial vehicle?

  1. A Back quickly to spend less time in the maneuver
  2. B Avoid backing whenever possible
  3. C Use only spoken directions when working with a helper
  4. D Choose backing instead of forward movement whenever possible

Correct answer: B – Avoid backing whenever possible

The Arizona CDL manual warns that backing is dangerous because the driver cannot see everything behind the vehicle. Avoid backing when possible, and park where you can pull forward when leaving. When backing is necessary, inspect the path, move slowly, use both mirrors, and use a helper when available.

Source: Arizona Commercial Driver License Manual — § 2.2.4, “Backing Safely”

Question 6

Containerized freight is commonly used when:

  1. A Hazardous-material restrictions do not apply
  2. B Normal vehicle weight limits can be exceeded
  3. C Part of the trip is made by rail or ship
  4. D The container does not need to be secured

Correct answer: C – Part of the trip is made by rail or ship

Containerized loads are generally used when freight travels part of the journey by rail or ship, with truck delivery at the beginning or end. Containers must still be properly secured to the vehicle. Sealed containers are also subject to gross and axle weight limits even though the driver cannot inspect their contents.

Source: Arizona Commercial Driver License Manual — § 3.3.5, “Sealed and Containerized Loads”

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