Oregon Hazardous Materials CDL Practice Test
Below are 25 exam-style questions for the Oregon Hazardous Materials CDL knowledge test, modeled on the FMCSA-aligned content used by the Oregon Driver and Motor Vehicle Services. Try to answer each question on your own before reading the answer key directly under it. The questions and answer choices are shuffled deterministically per state and endorsement, so the order will stay the same on repeat visits — that lets you genuinely measure your improvement.
- A Cargo tank vehicles only
- B Class 1 explosives, to determine which can be loaded together
- C All hazmat materials
- D Drivers, not cargo
- A Refer to the ERG
- B Refer to 49 CFR Parts 100-185 (HMR)
- C Contact the carrier safety officer
- D All of the above
- A Travel with a state escort
- B Drive only between 8 a.m. and 6 p.m.
- C Have written instructions on what to do in case of accident or delay
- D Avoid Class A highways only
- A Six
- B Two
- C One
- D Four (one on each side and one on each end)
- A They can shift freely
- B Containers can rub against each other
- C Cargo blocks emergency exits
- D Cargo cannot shift, leak, or be exposed to ignition sources
- A Painted any color
- B Marked with the proper shipping name, ID number, and required labels
- C Stored only at night
- D Made of glass only
- A Properly placarded trailer
- B Truck designed for the specific class
- C Vehicle without working brake lights or in unsafe condition
- D Vehicle in compliance with HMR
- A The state DMV
- B The carrier and the driver
- C The receiver
- D The shipper
- A Open the cargo doors to ventilate
- B Try to put it out with water
- C Drive the vehicle to a safe place
- D Stay upwind, evacuate the area, and let trained responders handle it
- A The train's crew
- B The train's schedule
- C A document describing all hazardous materials being carried
- D The number of cars
- A A Hazmat (H) endorsement on their CDL
- B No special endorsement
- C A medical card only
- D A separate license
- A Be in a low gear
- B Have a flashing light on
- C Be attended by the driver
- D Be locked
- A A barcode only
- B A state two-letter code
- C A serial number
- D UN or NA followed by four digits
- A Have current TSA security threat assessment
- B All of the above
- C Have current hazmat training
- D Carry shipping papers and ERG
- A An expired permit or shipper certification missing
- B A medical card
- C A logbook
- D Cargo securement straps
- A Stop, isolate the area, notify emergency services and the carrier
- B Open the container to inspect
- C Drive to the destination quickly
- D Continue and report at the next stop
- A Mailed to the receiver
- B Carried in the trailer
- C Only required for explosives
- D Carried in the cab and used by responders to look up immediate response information for hazmat
- A State and local routing
- B Federal rules (tunnels, bridges)
- C Carrier preference
- D All of the above
- A Never
- B Any single placard
- C Two or more separate placards on a load that contains different hazard classes (Table 2 materials only)
- D Only on Class 1 explosives
- A Proper shipping name, hazard class, ID number, and required emergency information
- B Price only
- C Driver's name
- D Color of packaging
- A Only at night
- B Within 50 feet of the crossing
- C Between 15 and 50 feet from the nearest rail
- D Only when a train is approaching
- A Renew the TSA assessment periodically
- B All of the above
- C Pass a TSA security threat assessment including fingerprinting
- D Notify the carrier of any incident
- A No — mix them in with other paperwork
- B Only on long trips
- C Only if the receiver requests it
- D Yes — they should be readily identifiable for emergency responders
- A 25 feet
- B 50 feet
- C 10 feet
- D 100 feet
- A Park within 5 feet of a road
- B Park near a fire
- C Park near an open flame
- D All of the above
Study tips for the Oregon Hazardous Materials exam
The Hazardous Materials portion of the Oregon CDL exam is graded out of the bank of questions the Oregon Driver and Motor Vehicle Services draws from each year. While the exact bank is not published, every question is sourced from the Hazardous Materials chapter of the Oregon CDL handbook, which itself is derived from the FMCSA Model Commercial Driver's License Manual. That means studying our practice tests, reading the corresponding handbook chapter, and re-reading the parts you got wrong is genuinely the most efficient route to a first-time pass.
Most successful applicants follow a simple cycle: take the practice test cold, write down every question you missed, open the matching chapter of the official Oregon handbook, re-read the section that contains the right answer, then re-take the practice test 24 to 48 hours later. The 24-hour delay matters — sleep is when your brain commits new information to long-term memory, and CDL knowledge questions reward that kind of consolidated learning rather than cramming.
Pay particular attention to questions that include qualifier words like always, never, only, primary, or most. CDL test writers love to flip the right answer with a single qualifier. When two answer choices look almost identical, pay attention to the verb (is it must, should, or may?) and to any numbers (14 days, 100 air miles, 8 hours, 70/8 split). On endorsement tests in particular, watch for trick framing where a true statement about a different endorsement is offered as the "correct" answer to a question that is actually about Hazardous Materials.
Test-day logistics matter too. Bring photo ID, your Social Security card or birth certificate, your medical examiner's certificate (DOT card), and proof of state residency if you haven't already submitted those documents. The Oregon Driver and Motor Vehicle Services will not let you sit for the knowledge exam without your documentation, and most offices charge an additional fee for re-attempts. Arrive early — the wait at most CDL testing offices runs 30 to 60 minutes — and silence your phone before the exam begins.
Finally, keep your General Knowledge fundamentals sharp even when you're focused on the Hazardous Materials exam. Many states administer multiple knowledge tests in a single sitting, and questions on weight definitions (GVWR, GCWR, GAWR), stopping distance, and the pre-trip inspection routine show up across endorsements. If you're unsure on the basics, sit a fresh Oregon General Knowledge practice test before scheduling the real exam.
Next steps
Missed more than four questions? Re-read the Hazardous Materials study guide and the matching chapter in the official Oregon CDL handbook. Then come back and re-take the test. Once you can score 22 of 25 or higher on three runs in a row, you're in good shape to schedule the real exam at your local Oregon Driver and Motor Vehicle Services office.
Already comfortable with this endorsement? Drill another: OR General Knowledge · OR Air Brakes · OR Combination Vehicles · OR Passenger · OR School Bus · OR Tank Vehicle · OR Doubles / Triples
New to the CDL process in Oregon? Read How to apply for a CDL in Oregon for the document checklist and step-by-step timeline.