CCDL Permit Prep

Hazardous Materials · page 6 of 8

Hazardous Materials questions 101–120

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 the federal placarding rule, how must a placard on a motor vehicle be visible?

    • AIt may be shaded by a tarp
    • BIt may be partly covered by cargo
    • CIt may face inward when parked
    • DIt must be clearly visible from the direction it facesCorrect

    Each placard on a motor vehicle must be clearly visible from the direction it faces, except from the direction of another transport vehicle or rail car to which it is coupled.

    eCFR 49 CFR 172.516 · 49 CFR 172.516(a): visibility and display of placards · verified 2026-09-08

  2. A required placard is damaged or faded enough to substantially reduce its legibility, color, or visibility. What must be done before transportation continues?

    • ARestore or replace it so it meets the display requirementsCorrect
    • BReport it after delivery
    • CCover it with clear tape
    • DTurn it to a cleaner side

    Required placards must be maintained so their format, legibility, color, and visibility are not substantially reduced by damage, deterioration, or obscuration. A faded or damaged placard that no longer meets this condition must be restored or replaced before the vehicle continues transportation.

    eCFR 49 CFR · 49 CFR 172.516(c): Visibility and display of placards · verified 2026-09-08

  3. Under 49 CFR 172.505(d), what may a hazardous material with secondary hazards display even when not required by that part?

    • ASubsidiary placards that correspond to its secondary hazardsCorrect
    • BThe shipper's advertising
    • CThe vehicle's weight rating
    • DA duplicate primary placard only

    Section 172.505 identifies specific cases where subsidiary placards are required. It also permits materials with secondary hazards to display corresponding subsidiary placards even when the part does not require them.

    Electronic Code of Federal Regulations · 49 CFR 172.505(d) · verified 2026-09-08

  4. If a cargo tank's required identification-number marking is not normally visible during transportation, where must the transport vehicle or freight container be marked?

    • AInside the cab only
    • BOn the rear bumper only
    • COn both sides and both endsCorrect
    • DOn the shipping papers only

    When the cargo tank’s required identification-number marking is not normally visible during transportation, the transport vehicle or freight container must be marked on each side and each end with the specified identification number.

    eCFR 49 CFR 172.328 · 49 CFR 172.328(a)(3): cargo-tank identification numbers · verified 2026-09-08

  5. Under 49 CFR 171.8, what is an overpack?

    • AA spare placard holder
    • BA package filled beyond capacity
    • CA duplicate set of shipping papers
    • DAn enclosure used by one consignor to protect, handle, or consolidate packagesCorrect

    49 CFR 171.8 defines an overpack as an enclosure used by one consignor to protect or make handling convenient for a package, or to consolidate two or more packages. It excludes a transport vehicle, freight container, and aircraft unit load device.

    eCFR 49 CFR 171.8 · 171.8: Overpack definition · verified 2026-09-07

  6. What do placards on a hazardous-materials vehicle communicate?

    • AThe hazard class of the cargoCorrect
    • BThe driver's route and schedule
    • CThe vehicle's fuel capacity
    • DThe name of the last driver

    FMCSA Sections 2.23.2–2.23.3 say placards communicate the risk and identify the hazard class of the cargo.

    FMCSA Commercial Driver License Manual · Sections 2.23.2–2.23.3: Why Are There Rules? and Lists of Regulated Products · verified 2026-09-08

  7. Under 49 CFR 172.800(b), what must a person who offers or transports one or more listed hazardous materials in commerce develop and adhere to?

    • AA transportation security plan for hazardous materialsCorrect
    • BA new insurance policy
    • CA fuel purchase schedule
    • DA customer mailing list

    49 CFR 172.800(b) requires each person who offers or transports one or more of the listed hazardous materials in commerce to develop and adhere to a transportation security plan that conforms to the subpart.

    eCFR 49 CFR 172.800 · 172.800(b): Security plan applicability · verified 2026-09-07

  8. Under 49 CFR §397.5(c), when may a driver leave unattended a vehicle carrying hazardous materials other than Division 1.1, 1.2, or 1.3 explosives on a public road?

    • AWhile performing duties incident and necessary to the driver’s duties as the vehicle operator.Correct
    • BWhenever the vehicle is locked.
    • CAny time the driver stops for a meal.
    • DWhenever the vehicle is parked on the highway shoulder.

    Section 397.5(c) requires attendance on a public street, highway, or shoulder, with an exception while the driver performs duties incident and necessary to operating the vehicle. Section 397.5(d)(1) separately defines when a vehicle is attended.

    Electronic Code of Federal Regulations: 49 CFR §397.5 · §397.5(c) and (d)(1): Attendance of motor vehicles · verified 2026-09-27

  9. Under Appendix E to 49 CFR Part 380, what must a Training Provider Registry-listed provider do for H endorsement theory training?

    • ACover every required hazardous-materials curriculum topic; federal rules set no minimum theory hoursCorrect
    • BProvide exactly 20 classroom hours and a road-skills test
    • CTeach only security screening and fingerprints
    • DProvide optional self-study with no required curriculum topics

    Appendix E sets the federal H endorsement theory curriculum. It requires coverage of every listed topic but does not prescribe a minimum number of theory hours. This app is permit preparation, not a Training Provider Registry-listed ELDT course.

    eCFR 49 CFR Part 380, Appendix E · Appendix E: H endorsement curriculum and theory-hour rule · verified 2026-09-07

  10. Under 49 CFR 171.15, when must a person in physical possession of hazardous material give telephone notice to the National Response Center for a listed reportable incident?

    • AAs soon as practical, but no later than 12 hours after the incidentCorrect
    • BOnly at the end of the shift
    • COnly after a written incident report is complete
    • DOnly after the shipment reaches its destination

    49 CFR 171.15 requires telephone notice to the National Response Center as soon as practical, but no later than 12 hours after a listed reportable incident. The listed conditions control whether this rule applies.

    Electronic Code of Federal Regulations · 49 CFR 171.15(a): Immediate notice of certain hazardous materials incidents · verified 2026-09-08

  11. Under 49 CFR 171.15(a), where must a person in physical possession of hazardous material give telephone notice after a reportable incident under 171.15(b)?

    • AThe vehicle's insurance broker
    • BThe National Response CenterCorrect
    • CThe nearest weigh station
    • DThe shipping paper's printer

    For a reportable incident, 49 CFR 171.15(a) requires telephone notice to the National Response Center as soon as practical, but no later than 12 hours after the incident. The rule applies to the person in physical possession of the hazardous material.

    eCFR 49 CFR 171.15 · 171.15(a)-(b): Immediate notice of reportable incidents · verified 2026-09-07

  12. After a qualifying incident requires telephone notice under 49 CFR 171.15, what further federal report does 49 CFR 171.16 require?

    • AA revised delivery schedule
    • BA verbal note to the driver
    • CA Hazardous Materials Incident Report within 30 days of discoveryCorrect
    • DA new set of placards

    A qualifying incident also requires the detailed Hazardous Materials Incident Report, DOT Form F 5800.1, within 30 days of discovery. The written-report rule is broader than the telephone-notice rule.

    eCFR 49 CFR 171.15 and 171.16 · 171.15–171.16: Telephone notice and detailed incident reports · verified 2026-09-07

  13. When may a vehicle spilling hazardous material be moved from where it has stopped?

    • AWhenever it would shorten the delivery delay
    • BWhenever the destination is nearby
    • CWhenever the leak looks small
    • DOnly as safety requires, when movement will not endanger people or cause contamination or vehicle damageCorrect

    Movement is a limited safety decision, not permission to seek a phone or finish a trip. Keep clear and get help if moving would expose people or spread contamination.

    Oregon DMV Commercial Driver Manual · 9.7.3 Fires (leaks and spills passage) · verified 2026-09-25

  14. Under the federal rule, which condition makes a hazardous-material vehicle attended?

    • AThe person in charge is on the vehicle, awake and outside a sleeper berth, or within 100 feet with an unobstructed viewCorrect
    • BThe person in charge is anywhere on the same terminal property and can reach the vehicle quickly, even without a direct view of it
    • CThe driver is resting in the sleeper berth with the cab doors locked
    • DSomeone is within 300 feet and can reach the vehicle within a minute

    Attendance has two defined paths: the person in charge is on the vehicle, awake, and not in a sleeper berth; or the person is within 100 feet and has the vehicle in an unobstructed field of view. Keys or an alarm do not substitute.

    eCFR 49 CFR 397.5 · 397.5(d)(1): definition of attended · verified 2026-09-29

  15. For a vehicle carrying Division 1.1, 1.2, or 1.3 explosives that must be attended, may the attendant be in a sleeper berth?

    • AYes, during required rest breaks
    • BYes, if the sleeper-berth curtain is open
    • CNo; the attendant must be awake and not in a sleeper berth, or within 100 feet with an unobstructed viewCorrect
    • DYes, if the engine is running

    A vehicle carrying Division 1.1, 1.2, or 1.3 explosives generally must be attended. A person attends it when awake and on the vehicle but not in a sleeper berth, or when within 100 feet with the vehicle in unobstructed view; the rule has listed exceptions.

    eCFR 49 CFR 397.5 · 49 CFR 397.5(a), (d)(1): attendance and sleeper berths · verified 2026-09-08

  16. Which tool is prohibited when loading, unloading, or otherwise handling Class 1 explosive materials?

    • AA bale hook or other metal toolCorrect
    • BA non-metallic tie-down used to secure a tarpaulin
    • CA closed vehicle body with a tight floor
    • DA non-ferrous interior lining where required

    The federal rule prohibits bale hooks and other metal tools when handling Class 1 explosives. It also prohibits rolling packages other than barrels or kegs and throwing or dropping packages. The rule does not ban every tool regardless of its material or use.

    eCFR 49 CFR 177.835 · 177.835(b): tools and handling of Class 1 explosive materials · verified 2026-09-07

  17. For Division 1.1, 1.2, or 1.3 explosive materials, what does the rule generally require inside the motor vehicle cargo space?

    • AA tight floor and non-metallic or non-ferrous lining where the interior contacts the loadCorrect
    • BA steel-lined floor and walls that ground the load against static electricity and protect packages from sharp exposed fasteners
    • CA layer of loose gravel to cushion the packages during transit
    • DA sealed plastic film over all packages to keep out moisture

    For these divisions, the vehicle must have tight floors, and the interior portion in contact with the load must be lined with non-metallic material or non-ferrous metal. The regulation has a limited government-shipment exception. It also requires the cargo space to be in good condition so exposed fasteners or damaged panels do not damage packages.

    eCFR 49 CFR 177.835 · 177.835(f): floors and linings for Division 1.1, 1.2, or 1.3 explosives · verified 2026-09-29

  18. Packaged Class 1 explosives are being loaded, and the engine is running only to power cab lights. What is the correct action?

    • AStop the engine before loadingCorrect
    • BLeave it idling for the lights
    • CRaise the engine speed to charge the battery
    • DRestart it every few minutes

    The engine must be stopped while Class 1 explosives are loaded or unloaded. The special pump exceptions do not apply to a packaged load or to an engine being used only for cab lights.

    eCFR 49 CFR 177.835 · 177.835(a): engine stopped while handling Class 1 explosives · verified 2026-09-07

  19. When a tarpaulin covers Class 1 explosive materials, how must it be secured?

    • AWith rope, wire, or an equally efficient tie-downCorrect
    • BOnly with metal bale hooks
    • COnly with a chain attached to the explosive packages
    • DIt may be left loose if the load is short

    When tarpaulins cover Class 1 explosives, they must be secured with rope, wire, or another equally efficient tie-down. Required explosive placards or markings must be secured to the transport equipment, not merely to the tarpaulin.

    eCFR 49 CFR 177.835 · 177.835(b)(1): tarpaulin tie-downs for Class 1 explosives · verified 2026-09-07

  20. A driver without leak-repair training has an emergency kit for a leaking cargo tank. What does the manual say to do?

    • ADo not try repairs; call the dispatcher or supervisor and, if needed, emergency personnelCorrect
    • BRepair the leak quickly using the kit
    • CRepair only small leaks
    • DKeep driving to the nearest truck stop

    The manual says never to try repairing leaks unless you have the training and equipment to do so safely, and to call your dispatcher or supervisor and, if needed, emergency personnel.

    Oregon DMV Commercial Driver Manual · 9.7.3 Fires (leaks and spills passage) · verified 2026-09-25