Oregon Class A CDL Practice Test (OR) 8

4.9 out of 5 (45 votes)
80% Passing score
50 Questions
10 Mistakes allowed
As you prepare for your Class A CDL in Oregon, it's essential to have the right tools at your disposal. That's where our eighth Oregon CDL practice test comes in - a crucial resource for aspiring commercial drivers. This class A CDL practice test is meticulously designed to mirror the actual Oregon permit test, both in style and substance. With 50 comprehensive DMV questions, you are required to correctly answer at least 40 to pass, mirroring the real test's rigor. The permit practice test is specifically tailored to the needs of Class A CDL applicants in Oregon. It encompasses a wide array of topics, ensuring that you're well-prepared for anything the real CDL test might throw your way. From pre-trip vehicle inspection to the nuances of shifting gears, controlling speed on different terrains, and understanding Oregon's specific driving laws and regulations, this Oregon class A CDL practice test covers it all. We've included detailed questions on communicating effectively with other road users and vital topics like drug and alcohol awareness, critical for safe and responsible driving. We understand that accessibility is key. That's why our Oregon DMV practice test is easily available online, ensuring that you can access it from anywhere - be it on your desktop at home or through mobile apps when you're on the move. This flexibility allows you to practice at your own pace and on your terms, fitting preparation seamlessly into your busy schedule. Diligent preparation is the key to success, and with our Oregon CDL Class A practice test, you're taking a significant step towards achieving your commercial driving license in 2026. The practice test's consistent format each time you take it ensures a thorough understanding and mastery of the content, equipping you with the knowledge and confidence needed to excel in your actual Oregon CDL permit test in 2026!
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Sample Oregon CDL Test Questions - General Knowledge

Question 1

If an emergency forces your vehicle off the pavement, how should you brake?

  1. A. Move every wheel onto the shoulder before slowing
  2. B. Brake hard as soon as you leave the pavement
  3. C. Avoid braking, if possible, until about 20 mph, then brake gently
  4. D. Continue at road speed because shoulders cannot support trucks

Correct answer: C. – Avoid braking, if possible, until about 20 mph, then brake gently

If possible, avoid braking until the vehicle has slowed to about 20 mph. Then apply the brakes very gently because a loose shoulder surface may provide less traction. Keep one set of wheels on the pavement when possible, and remain on a clear shoulder until the vehicle stops.

Source: Oregon Commercial Driver License Manual — § 2.17.1, “Steering to Avoid a Crash”

Question 2

What can result from placing excessive cargo weight on the steering axle?

  1. A. Hard steering
  2. B. Unusually easy steering
  3. C. Easier braking
  4. D. Reduced brake-pedal effort

Correct answer: A. – Hard steering

Too much weight on the steering axle can make steering difficult and may damage the axle and tires. Weight shifted too far rearward creates a different problem by making the steering axle too lightly loaded for safe steering. Proper cargo distribution helps maintain steering and traction.

Source: Oregon Commercial Driver License Manual — § 3.2.4, “Balance the Weight”

Question 3

What minimum tread depth is required in the major grooves of front tires on a commercial truck?

  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 regulations require at least 4/32 inch of tread in a major groove on the front wheels of a bus, truck, or truck tractor. The Oregon manual uses the same minimum and requires at least 2/32 inch on other tires. Measurements are not taken at tie bars, humps, or fillets.

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

Question 4

What is the primary reason for inspecting a commercial vehicle?

  1. A. To complete required paperwork
  2. B. To protect the safety of the driver and other road users
  3. C. To check only the vehicle’s lights
  4. D. To find overinflated tires

Correct answer: B. – To protect the safety of the driver and other road users

The Oregon manual identifies safety as the most important reason for inspecting a vehicle. A thorough inspection can reveal defects that might otherwise cause a breakdown or crash. Lights and tires are important inspection items, but checking either one alone is not the main purpose of the inspection.

Source: Oregon Commercial Driver License Manual — § 2.1.1, “Why Inspect”

Question 5

Which item may be transported on a passenger-carrying bus when applicable hazardous-material rules are followed?

  1. A. Small-arms ammunition
  2. B. An emergency shipment of hospital supplies
  3. C. An emergency shipment of drugs
  4. D. All of these

Correct answer: D. – All of these

Passenger-carrying vehicle rules identify small-arms ammunition and emergency shipments of drugs, chemicals, and hospital supplies as exceptions to the general restriction. Other hazardous materials, quantities, and storage locations remain restricted. For example, most Class 1 materials cannot be carried in the passenger-occupied space.

Source: 49 CFR § 177.870(b)–(c) — Regulations for passenger carrying vehicles

Question 6

Which group lists recognized causes of commercial-vehicle fires?

  1. A. Spilled fuel and improper use of flares
  2. B. Smoking, improper fueling, and loose fuel connections
  3. C. Flammable, poorly sealed, or poorly ventilated cargo
  4. D. All of these

Correct answer: D. – All of these

Each answer lists conditions identified as possible causes of vehicle fires. Spilled fuel and incorrectly used flares can ignite after a crash. Smoking, improper fueling, loose fuel connections, flammable cargo, poor cargo sealing, and inadequate ventilation can also contribute to a fire.

Source: Oregon Commercial Driver License Manual — § 2.21.1, “Causes of Fire”

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