CCDL Permit Prep

Hazardous Materials · page 3 of 8

Hazardous Materials questions 41–60

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 49 CFR 172.202, what is the required sequence for a hazardous material’s basic description on a shipping paper?

    • AUN/NA identification number, proper shipping name, hazard class or division, packing group (where applicable)Correct
    • BProper shipping name, hazard class or division, UN/NA identification number, packing group
    • CCompany name, origin, destination, and weight
    • DPlacard type, emergency contact, quantity, and destination

    The basic description must show the identification number, proper shipping name, hazard class or division, and packing group in that sequence, with no additional information interspersed. The section has stated exceptions and separate placement rules for quantity and package information.

    49 CFR § 172.202 · Hazardous Materials — Shipping Paper Format · verified 2026-09-07

  2. Which choice contains categories listed in the 49 CFR 172.504 Table 1 placarding table?

    • AClass 3 flammable liquid and Class 8 corrosive material
    • BDivision 2.3 poison gas and Division 6.1 material poisonous by inhalationCorrect
    • CClass 8 corrosive material and Class 9 miscellaneous material
    • DClass 9 miscellaneous material and Division 4.1 flammable solid

    Table 1 lists Division 2.3 as POISON GAS and Division 6.1 material poisonous by inhalation as POISON INHALATION HAZARD. Table 1 also includes other listed categories, such as Divisions 1.1 through 1.3, Division 4.3, a specified temperature-controlled Division 5.2 category, and Radioactive Yellow III; general and additional placarding provisions still apply.

    eCFR 49 CFR 172.504 · 172.504(a), (c), and (e): Table 1 and Table 2 placarding categories and exceptions · verified 2026-09-07

  3. Under the federal hazardous materials regulations, what does a packing group show?

    • AA designation (PG I, II, or III) showing the degree of dangerCorrect
    • BThe shipping container used for a specific class of material
    • CThe group of hazmat placards that must be displayed together
    • DThe number of containers allowed per shipment

    A packing group is a grouping according to the degree of danger presented by hazardous materials: Packing Group I indicates great danger, II medium danger, and III minor danger.

    49 CFR § 171.8 · Definitions: Packing group · verified 2026-09-07

  4. Under 49 CFR 172.604, the emergency response telephone number on a hazmat shipping paper must be:

    • AMonitored at all times the material is in transportationCorrect
    • BAn answering service that calls back later
    • COptional if the driver carries a cell phone
    • DThe number of the local police only

    49 CFR 172.604(a) requires a number monitored at all times the material is in transportation; a number requiring a call back does not meet the requirement.

    49 CFR 172.604 Emergency response telephone number · 172.604(a)(1) · verified 2026-09-25

  5. Under 49 CFR 383.121, which parts supply the required HazMat endorsement knowledge scope?

    • AOnly the state motor-vehicle code
    • B49 CFR Parts 171, 172, 173, 177, 178, and 397Correct
    • CAll of 49 CFR Parts 171 through 180
    • DOnly the IATA Dangerous Goods Regulations

    Section 383.121 sets the required HazMat endorsement knowledge scope from Parts 171, 172, 173, 177, 178, and 397. That stated list, rather than the full 171–180 range, controls this federal knowledge requirement.

    eCFR 49 CFR 383.121 · 383.121: Hazardous Materials endorsement knowledge requirements · verified 2026-09-07

  6. Under 49 CFR 177.817(e)(2)(i), how must hazardous-material shipping papers be stored while the driver is at the vehicle's controls?

    • AWithin reach while belted in, and either in plain view to someone entering the cab or in a holder on the driver's doorCorrect
    • BIn the glove compartment or a locked document box in the cab, as long as the driver can tell responders where they are
    • CIn the sleeper berth with the driver's logbook, ready to hand over on request
    • DAttached to the cargo on the trailer so responders find them with the load

    While the driver is at the controls, 49 CFR 177.817(e)(2)(i) requires both immediate reach while restrained by the lap belt and either visibility to a person entering the compartment or a holder mounted inside the driver's door. Different placement applies when the driver is not at the controls.

    eCFR 49 CFR 177.817 · 177.817(e)(2)(i): Storage while the driver is at the controls · verified 2026-09-29

  7. Under 49 CFR 173.22, who must ensure a hazardous material is classified, described, packaged, marked, and labeled as required before it is offered for transportation?

    • AThe person who offers the hazardous material for transportationCorrect
    • BThe driver alone at the dock
    • CThe consignee only after delivery
    • DA state inspector at a weigh station

    49 CFR 173.22 places this pre-transport duty on the person who offers the hazardous material for transportation. Other parties can have duties under other rules.

    Electronic Code of Federal Regulations · 49 CFR 173.22(a)(1) · verified 2026-09-07

  8. Hazardous material is leaking from your stopped vehicle. What should an untrained driver do?

    • AApproach and reseal the container
    • BDrive to a truck stop to find a phone
    • CKeep clear and upwind, warn others away, and call for helpCorrect
    • DContinue to the delivery point

    Do not touch the release or try to identify it by smell. Keep people away and communicate the cargo information from a safe place. Attempting repair requires suitable training and equipment.

    Oregon DMV Commercial Driver Manual · 9.7.2–9.7.3 · verified 2026-09-07

  9. Under 49 CFR 177.848, why must some hazardous materials be segregated during motor-vehicle transport?

    • AIt keeps the placards easier to read
    • BIt makes unloading faster at the dock
    • CIt balances the axle weights better
    • DTo prevent a dangerous evolution of heat or a dangerous reaction if the materials mixCorrect

    49 CFR 177.848 uses segregation requirements to prevent dangerous heat or dangerous reactions when listed hazardous materials are transported together.

    Electronic Code of Federal Regulations · 49 CFR 177.848 · verified 2026-09-07

  10. Before a State issues, renews, upgrades, or transfers an H endorsement, which federal security condition may satisfy 49 CFR 383.141?

    • ATSA has determined the person poses no security risk, or the person holds a valid TWICCorrect
    • BThe driver has passed a general medical examination
    • CThe driver has a separate intrastate permit
    • DThe driver has an additional vehicle-inspection sticker

    An H endorsement is issued by the State, while the federal security condition is separate. Section 383.141 bars issuance, renewal, upgrade, or transfer unless TSA has made the stated determination or the person holds a valid TWIC. Follow the State's process for its other application steps.

    eCFR 49 CFR 383.141 · 383.141(b): TSA determination or valid TWIC · verified 2026-09-07

  11. Except for a brief operational necessity, where may a vehicle carrying Division 1.1, 1.2, or 1.3 explosives not park?

    • AWithin 300 feet of a bridge, tunnel, dwelling, or place where people work, gather, or assembleCorrect
    • BAt any carrier property where the load is known
    • CIn a safe haven approved in writing
    • DAt a construction site carrying 50 pounds or less

    For these explosive divisions, the vehicle may not normally park within 300 feet of the listed places. The rule has a narrow exception for brief operational necessity when no other location is practicable. Other parking limits and attendance rules can also apply.

    eCFR 49 CFR 397.7 · 397.7(a)(3): parking distance for Division 1.1, 1.2, or 1.3 explosives · verified 2026-09-07

  12. Under 49 CFR 397.17, what must a driver do after finding an overheated tire on a placarded vehicle?

    • AContinue to the next service area at reduced speed
    • BSpray the tire with water while the vehicle moves
    • CHave the tire removed to a safe distance from the vehicle and correct the overheating cause before operatingCorrect
    • DLower tire pressure and continue driving

    The driver must immediately have an overheated tire removed to a safe distance from the vehicle and must not operate the vehicle until the cause of overheating is corrected. The rule does not say to move the hazardous load away from the tire.

    eCFR 49 CFR 397.17 · 397.17(a)-(c): tire examination, defect response, and overheating · verified 2026-09-07

  13. A vehicle carrying a required Class 8 placard must stop at this crossing under § 392.10. What distance range applies?

    • ABetween 1 and 10 feet from the rail
    • BBetween 5 and 15 feet from the rail
    • CBetween 50 and 100 feet from the rail
    • DBetween 15 and 50 feet from the railCorrect

    The required stop is within 15–50 feet of the tracks. Look and listen before crossing and use a gear that avoids shifting on the tracks. The stem establishes the applicable stopping duty.

    49 CFR § 392.10 · 392.10(a) listed vehicles and (b) exceptions · verified 2026-09-07

  14. Under 49 CFR 172.202(a), which set lists required elements of a hazardous-material shipping description?

    • AIdentification number, proper shipping name, hazard class or division, and packing group when applicableCorrect
    • BThe driver's route and rest stops
    • CThe receiving dock's opening hours
    • DThe tractor's registration details

    49 CFR 172.202(a) requires these elements in the shipping description. The packing group is included when applicable; other entries can also be required under the hazardous-materials regulations.

    Electronic Code of Federal Regulations · 49 CFR 172.202(a) · verified 2026-09-07

  15. A hazardous-material package is damaged or leaking at pickup. What is a compliant next step before transport?

    • AUse compliant salvage packaging or other authorized handling for repackaging or disposalCorrect
    • BRepack it in any available container
    • CAccept it and note the damage
    • DDeliver it with the placards removed

    Damaged, defective, or leaking hazardous-material packages may be placed in compatible, compliant salvage packaging for repackaging or disposal under the stated federal conditions. Do not improvise packaging or begin ordinary transport with a leaking package.

    eCFR 49 CFR 173.3 · 173.3(c): salvage drums for damaged or leaking packages · verified 2026-09-07

  16. A hazardous-material package bears required orientation markings. How must it be loaded and carried?

    • AWith the marked orientation maintained throughout transportationCorrect
    • BOn its side if that uses less trailer space
    • CIn any position after the first 25 miles
    • DUpside down when secured with cargo bars

    A package bearing required orientation markings must be loaded according to those markings and remain in that position during transportation. Securing packages against shifting is a separate requirement.

    eCFR 49 CFR 177.834 · 177.834(b): orientation markings · verified 2026-09-07

  17. At a hazardous-material release, which action best protects bystanders?

    • AWarn them away from the scene and keep them upwind while calling for helpCorrect
    • BBring them closer to photograph the leak
    • CAsk them to move damaged packages
    • DHave them clean up the spill

    Keep yourself and others clear of the hazard and call emergency services. Provide cargo details to responders from a safe place; do not approach just to inspect the release.

    Oregon DMV Commercial Driver Manual · 9.7.2–9.7.3 · verified 2026-09-07

  18. How many hazard classes are used to group hazardous materials?

    • ASix
    • BFour
    • CNineCorrect
    • DTwelve

    The federal Hazardous Materials Regulations use nine hazard classes. A material can have a primary hazard and, when applicable, subsidiary hazards.

    FMCSA Commercial Driver's License Manual (July 2014) · 9.2 Hazardous Materials · verified 2026-09-25

  19. Under the federal hazardous materials regulations, which hazard class covers explosives?

    • AClass 9
    • BClass 2
    • CClass 5
    • DClass 1Correct

    Class 1 covers explosives. Federal rules assign a Class 1 explosive material to a division within Class 1 when it also meets another hazard-class or division definition.

    eCFR 49 CFR 173.2a · 49 CFR 173.2a(c)(1): Class 1 explosive materials · verified 2026-09-08

  20. After a hazardous-material incident, responders ask you for information to locate the correct Emergency Response Guidebook entry. Which cargo details should you provide?

    • AThe proper shipping name and hazardous-material identification numberCorrect
    • BThe trailer model and its purchase date
    • CThe delivery appointment time and driver pay rate
    • DThe carrier fleet size and fuel brand

    The guide is indexed by proper shipping name and hazardous-material identification number. Give responders the shipping papers and emergency response information. Vehicle or business details cannot identify the cargo hazard.

    Oregon DMV Commercial Driver Manual · 9.7.1–9.7.2 · verified 2026-09-07