CCDL Permit Prep

Hazardous Materials · page 5 of 8

Hazardous Materials questions 81–100

Part of the 159-question Hazardous Materials pool. Each answer cites the FMCSA CDL Manual or the federal rule it comes from.

Practise these as a timed set

  1. Under federal hazardous-material routing rules, before allowing a vehicle to operate, when must a motor carrier prepare a written route plan and furnish it to the driver?

    • AFor a shipment containing Class 1 Division 1.1, 1.2, or 1.3 explosivesCorrect
    • BFor every hazardous-material shipment
    • COnly overnight deliveries
    • DOnly interstate moves

    49 CFR 397.67 requires the carrier or its agent to prepare a written route plan and furnish it to the driver before operation of a vehicle containing Class 1 Division 1.1, 1.2, or 1.3 explosives.

    49 CFR, eCFR · 49 CFR 397.67(d): Written route plan · verified 2026-09-08

  2. Which condition can allow an emptied hazardous-material cargo tank to stop displaying the former cargo’s placards?

    • AClosing its valves without checking residue
    • BSufficient cleaning and vapor purging to remove any potential hazardCorrect
    • CFinishing the delivery paperwork
    • DParking the tank overnight

    Cleaning and purging must remove the potential hazard; simply calling a tank empty is not enough. The regulation also provides other specific exceptions, so purging is not the only possible legal pathway.

    eCFR 49 CFR · 172.514(b)(1)–(4) · verified 2026-09-07

  3. Before transporting a material, what should you check to determine whether it needs placards?

    • AThe Hazardous Materials Table and the applicable listsCorrect
    • BOnly the destination state's route map
    • COnly the carrier's freight invoice
    • DThe package color and a guess

    FMCSA Section 9.3.3 directs drivers to check the Hazardous Materials Table, the hazardous-substances/reportable-quantities list, and the marine-pollutants list before transporting a material.

    FMCSA Commercial Driver License Manual · Section 9.3.3: Lists of Regulated Products · verified 2026-09-08

  4. Under 49 CFR 172.704(c)(2), how often must a hazmat employee receive required recurrent training?

    • AAt least once every three yearsCorrect
    • BOnly when insurance premiums change
    • COnly after a medical examination
    • DOnly when a delivery route changes

    49 CFR 172.704(c)(2) requires a hazmat employee to receive the training required by the subpart at least once every three years. A revised security plan can require in-depth security training within 90 days of implementation.

    eCFR 49 CFR 172.704 · 172.704(c)(2): Recurrent training · verified 2026-09-07

  5. For a placarded vehicle, from how many directions must the placards be readable?

    • AAll four directionsCorrect
    • BThe front only
    • CThe rear only
    • DThe driver's side only

    FMCSA Section 9.3.3 says a placarded vehicle has placards on the front, rear, and both sides, readable from all four directions.

    FMCSA Commercial Driver License Manual · Section 9.3.3: Lists of Regulated Products · verified 2026-09-08

  6. Under the federal hazardous materials regulations, what does Class 9 cover?

    • AOnly radioactive materials
    • BMiscellaneous hazardous materialsCorrect
    • COnly corrosive liquids
    • DOnly flammable solids

    Class 9 covers miscellaneous hazardous materials: materials that present a hazard during transportation but do not meet the definition of another hazard class.

    eCFR 49 CFR 173.140 · 49 CFR 173.140: Class 9 definitions · verified 2026-09-08

  7. Under the federal hazardous materials regulations, what does Division 4.1 identify?

    • ACompressed gases
    • BFlammable solidsCorrect
    • CCorrosive liquids
    • DRadioactive materials

    Division 4.1 identifies flammable solids. Class 4 also includes Division 4.2 (spontaneously combustible materials) and Division 4.3 (dangerous when wet materials).

    eCFR 49 CFR 173.124 · 49 CFR 173.124(a)-(c): Class 4 divisions · verified 2026-09-08

  8. Under 49 CFR, which two divisions make up Class 5 hazardous materials?

    • ADivision 2.3 poisonous gases and Division 6.1 poisonous materials
    • BClass 3 flammable liquids and Division 4.1 flammable solids
    • CDivision 5.1 oxidizers and Division 5.2 organic peroxidesCorrect
    • DDivision 1.1 mass-explosion hazards and Division 1.2 projection hazards

    Class 5 has two divisions: Division 5.1 oxidizers and Division 5.2 organic peroxides. The rule defines an oxidizer as a material that may generally yield oxygen and cause or enhance combustion. It gives organic peroxide its own separate definition, so do not treat every Class 5 item as the same hazard type.

    eCFR 49 CFR 173.127 and 173.128 — Class 5 definitions · 173.127(a) — Division 5.1 oxidizer; 173.128(a) — Division 5.2 organic peroxide · verified 2026-09-07

  9. Under the federal hazardous materials regulations, what types of hazards are in Class 6?

    • ACorrosive materials
    • BFlammable solids
    • CCompressed gases
    • DPoisonous and infectious substancesCorrect

    Class 6 includes Division 6.1 poisonous materials and Division 6.2 infectious substances. A Division 6.2 material is known or reasonably expected to contain a pathogen.

    eCFR 49 CFR 173.132 and 173.134 · 49 CFR 173.132 and 173.134: Class 6 divisions · verified 2026-09-08

  10. Which type of gas is assigned to Division 2.3 under federal hazardous materials regulations?

    • APoisonous gasCorrect
    • BNon-flammable gas
    • CFlammable gas
    • DOxidizing gas

    Division 2.3 identifies gas poisonous by inhalation. The definition applies to a gas that is known to be toxic to humans during transportation, or is presumed toxic using the stated test criterion when adequate human-toxicity data are unavailable.

    eCFR 49 CFR 173.115 · 49 CFR 173.115(c): Division 2.3 gas poisonous by inhalation · verified 2026-09-08

  11. Under the federal hazardous materials regulations, what distinguishes Division 1.1 explosives?

    • AThey cannot detonate at all
    • BThey have a mass explosion hazardCorrect
    • CThey only burn slowly
    • DThey are safe without placards

    Division 1.1 consists of explosives with a mass explosion hazard. A mass explosion affects almost the entire load instantaneously.

    eCFR 49 CFR 173.50 · 49 CFR 173.50(b)(1): Division 1.1 · verified 2026-09-08

  12. When a compatibility group letter is required on an EXPLOSIVES placard, what does it indicate?

    • AThe truck's route code
    • BThe shipper's initial
    • CThe compatibility groupCorrect
    • DThe package weight class

    For EXPLOSIVES 1.1, 1.2, and 1.3 placards, 49 CFR 172.522 requires the appropriate compatibility group letter when a letter is required.

    eCFR 49 CFR · 49 CFR 172.522(b): EXPLOSIVES 1.1, 1.2, and 1.3 placards · verified 2026-09-08

  13. For vessel transportation, what does the MARINE POLLUTANT mark identify?

    • AThe container is watertight
    • BThe load was shipped by sea
    • CThe vehicle may use ferries
    • DA package that contains a marine pollutantCorrect

    For vessel transportation, 49 CFR 172.322 requires the MARINE POLLUTANT mark on qualifying non-bulk packages that contain a marine pollutant.

    eCFR 49 CFR · 49 CFR 172.322(a): Marine pollutants · verified 2026-09-08

  14. Under EPA hazardous-waste transportation rules, what must a highway transporter generally receive before accepting federally regulated hazardous waste from a generator?

    • AA properly prepared Uniform Hazardous Waste ManifestCorrect
    • BA standard delivery receipt
    • CA vehicle inspection report
    • DA driver's logbook page

    Except for stated exemptions, EPA says a transporter may not accept hazardous waste from a generator unless the transporter is provided a properly prepared manifest. The transporter signs and dates it on receipt.

    U.S. EPA Hazardous Waste Transportation · Complying with EPA's Hazardous Waste Manifest System · verified 2026-09-07

  15. How does the FMCSA manual define a limited quantity?

    • AThe maximum amount of hazardous material for which a labeling or packaging exception may applyCorrect
    • BA load that exceeds every applicable limit
    • CA material forbidden from transportation
    • DCargo restricted to one state

    The Section 9 glossary defines a limited quantity as the maximum amount of a hazardous material for which there may be a specific labeling or packaging exception.

    FMCSA Commercial Driver License Manual · Section 9 glossary: Limited quantity · verified 2026-09-08

  16. Under 49 CFR 172.202(a), which name must appear in a hazardous material's shipping description?

    • AThe customer's internal code
    • BThe manufacturer's trade name
    • CThe proper shipping nameCorrect
    • DThe common street name

    The federal shipping-description rule requires the proper shipping name prescribed for the material in Column 2 of the Hazardous Materials Table.

    eCFR 49 CFR 172.202 · 172.202(a)(2) — proper shipping name · verified 2026-09-07

  17. Under 49 CFR 172.202(a), for non-air transportation and subject to listed exceptions, which information must a hazardous-material shipping paper indicate?

    • AThe driver's hours of service and the carrier's DOT number
    • BThe total quantity with its unit of measure, and the number and type of packagesCorrect
    • CThe gross vehicle weight rating of the tractor and the license plate numbers of both the tractor and the trailer
    • DThe delivery address and the scheduled arrival time

    For non-air transportation, 49 CFR 172.202(a)(5) requires the total quantity by mass, volume, or Class 7 activity with a unit of measure, subject to listed exceptions. Section 172.202(a)(7) also requires the number and type of packages.

    eCFR 49 CFR 172.202 · 172.202(a)(5) and (a)(7): Quantity and package information · verified 2026-09-29

  18. For a hazardous-material shipment subject to 49 CFR 172.604, what emergency-response information must be on the shipping paper?

    • AAn emergency response phone numberCorrect
    • BThe driver's home address
    • CThe truck's fuel capacity
    • DThe shipper's bank details

    For a shipment subject to 49 CFR 172.604, the shipping paper must show a monitored emergency-response telephone number. The number must be available while the material is in transportation, and a person must be available who is knowledgeable about the material and has comprehensive emergency-response and incident-mitigation information, or immediate access to it.

    eCFR 49 CFR · 49 CFR 172.604: Emergency response telephone number · verified 2026-09-08

  19. For a shipment subject to the emergency-response-number rule, when must that number be monitored?

    • AOnly during business hours
    • BThroughout transportation, including storage incidental to transportationCorrect
    • COnly once each day
    • DOnly while the truck is moving

    Coverage includes transportation-related storage, not just motion. The call must reach someone with the needed information or immediate access to it; a callback-only service is insufficient.

    eCFR 49 CFR · 172.604(a)(1)–(2) · verified 2026-09-07

  20. Under the federal placarding rule, where must required placards be displayed on a transport vehicle or freight container?

    • ABoth front corners only
    • BThe rear only
    • COn each side and each endCorrect
    • DThe driver's side only

    Required placards must be displayed on each side and each end of a transport vehicle or freight container. That is four displayed surfaces: both sides, the front, and the rear.

    eCFR 49 CFR 172.516 · 49 CFR 172.516(a): general placarding requirements · verified 2026-09-08