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Oregon General Knowledge Test

You'll face mountain passes like Siskiyou Summit on I-5, so our test helps you prep for real Oregon conditions.

140
Questions
80%
To Pass
60
Minutes

140 questions · 60 min time limit · 80% to pass

Opens in a practice window — choose your mode inside.

JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026

All questions sourced from the official Oregon CDL handbook and FMCSA regulations.

About the Oregon General Knowledge Test

Oregon's roads aren't like anywhere else. You'll drive through the Coast Range on US-20, cross the high desert on US-97, and navigate Portland's tight urban corridors. Our practice test covers the exact topics from the Oregon CDL manual.

Weather changes fast in Oregon. One minute you're in rain on the Willamette Valley floor, the next you're in snow at Santiam Pass. The General Knowledge test asks about hazardous conditions, cargo security, and vehicle inspections. You need to know how Oregon's logging trucks, farm equipment, and winter chains affect your driving.

We built this test with Oregon's specific rules in mind. You'll see questions about the state's 55 mph speed limit for large trucks on interstates, its strict cell phone ban, and its chain-up requirements. Don't waste time studying generic national guides. Focus on what Oregon's DMV actually tests.

Passing the General Knowledge test is your first step toward an Oregon CDL. It's not just about memorizing facts. It's about proving you can handle the real challenges Oregon throws at you. Our questions match the DMV's format and difficulty. Start practicing now.

Oregon's commercial driving spans from the I-5 corridor through the Willamette Valley to the high desert of eastern Oregon and the mountain passes of the Cascade Range. I-84 follows the Columbia River Gorge along the northern border, connecting Portland to Idaho. Our general knowledge practice test mirrors the official Oregon DMV CDL written exam.

The Cascade Range passes — including the Santiam Pass (US-20), Willamette Pass (US-58), and the grades on I-5 at Sexton Mountain — demand engine braking and winter traction awareness. The Oregon Department of Transportation enforces chain requirements on mountain passes. The Columbia River Gorge on I-84 is known for strong crosswinds that can push empty trailers. The exam tests grade descent, chain use, and wind awareness directly.

Topics Covered

✓Vehicle inspection – Oregon's rainy climate means checking wipers, lights, and brakes regularly.
✓Basic control and backing – Essential for Portland's tight loading docks and narrow logging roads.
✓Communicating with other drivers – Oregon's frequent fog and mountain curves demand proper signaling and eye contact.
✓Speed management – Know Oregon's 55 mph truck limit on interstates and reduced speeds on winding coastal highways.
✓Space management – Keep safe following distance in Oregon's stop-and-go traffic and construction zones.
✓Hazard perception – Watch for deer on US-26, falling rocks on the Columbia Gorge, and sudden chain-up areas.

Study Tips

You'll do better if you study the Oregon CDL manual cover to cover. The DMV pulls questions straight from it. Focus on sections about air brakes, combination vehicles, and cargo – those are the hardest for most drivers. Use our practice test to find your weak spots, then review those chapters twice.

Oregon's DMV doesn't give you the same test every time. But the question pool stays consistent. Pay attention to Oregon-specific rules like the ban on handheld cell phones for CDL holders and the requirement to carry tire chains during winter months on certain highways. Our test includes these details because they show up on the real exam.

Oregon Specific Information

  • You can take the General Knowledge test at any Oregon DMV office that offers CDL services. Large offices like Portland's 2730 SE 82nd Ave, Salem's 3100 Silverton Rd NE, and Medford's 6161 Crater Lake Ave have dedicated CDL testing. You'll need to schedule an appointment online – walk-ins aren't allowed for CDL knowledge tests. Check the DMV's appointment system two weeks ahead; slots fill fast.

    The test costs $10 per attempt. You must bring your valid Oregon driver's license, proof of identity, and your medical examiner's certificate (if applicable). If you don't pass, you can retake it the same day, but you'll pay again. Most students pass within two tries using our practice tests.

    Oregon recently updated its CDL manual. Make sure you're using the 2025 edition. Our content matches that version. Don't rely on old study guides – you'll miss newer questions about electronic logging devices and the federal entry-level driver training rule.

  • The Oregon Driver and Motor Vehicle Services (DMV) requires a knowledge test for all CDL classes; the general knowledge exam is the foundation for every commercial license.
  • Cascade Range passes (Santiam, Willamette, and Sexton Mountain on I-5) require low-gear descents and winter chain use.
  • The Columbia River Gorge (I-84) is known for strong crosswinds that can push empty trailers — the exam tests wind-steer and rollover prevention.
  • The Port of Portland handles container and bulk cargo; drayage traffic is present on I-5 and I-84.
  • Oregon's timber and agricultural industries generate heavy log truck and produce hauls on rural highways.
  • Rain and wet roads are year-round west of the Cascades; following distance and braking adjustments are essential.

Frequently Asked Questions

How many questions are on Oregon's CDL General Knowledge test?
You'll answer 50 multiple-choice questions. To pass, you need at least 40 correct (80%). The test covers vehicle inspection, basic control, and road safety.
Can I take the Oregon CDL General Knowledge test online?
No. Oregon's DMV doesn't offer an online version. You must take it in person at a DMV office with an appointment. Bring your current license and payment.
Do I need a CDL permit before taking the General Knowledge test?
No, you don't need a permit first. The knowledge test is the first step. After passing, you'll get your instruction permit (CLP) if you also pass the vision and written rules tests.
What if I fail the General Knowledge test in Oregon?
You can retake it the same day if you want, but you'll pay the $10 fee again. Most people pass within two attempts. Our practice test helps you avoid retakes.
Does Oregon's General Knowledge test include air brake questions?
Yes, if you plan to drive a vehicle with air brakes. The test includes a separate air brake endorsement section. You'll need to answer those questions correctly to get the L endorsement on your CDL.
JM

Reviewed by Jack Mahana, CDL Instructor (13+ years)

Last verified: August 2026 · FMCSA-compliant content