Who normally classifies a shipment and supplies its proper shipping description before the carrier accepts it?
Correct answer: The shipper offering the material.
Classification and the shipping description are offeror responsibilities. The carrier may rely on supplied information unless it knows, or reasonably should know, that it is incorrect.
Source: PHMSA interpretation 26-0043, August 17, 2026; offeror classification and reasonable carrier reliance; 171.2(f), 177.817(a). Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Under the general federal hazmat-employee training rule, how often is recurrent training required?
Correct answer: At least once every three years.
Recurrent hazmat-employee training is required at least every three years. A CDL renewal is not a substitute, and required training for changed duties or rules must not be postponed until that interval expires.
Source: PHMSA Training Requirements for Industry, updated October 8, 2024; Recurrent Training; 172.704. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
A newly hired hazmat employee has not finished required initial training. What condition permits covered work during the initial training period?
Correct answer: Direct supervision by a properly trained, knowledgeable hazmat employee.
Initial training must be completed within 90 days, and covered functions performed beforehand must be under the specified direct supervision. This does not waive separate driver licensing requirements.
Source: PHMSA Training Requirements for Industry, updated October 8, 2024; Initial Training; 172.704. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
After a hazmat employee leaves that role with an employer, how long must that employer keep the required current training record?
Correct answer: For 90 days after employment as a hazmat employee ends.
The employer retains current training records, inclusive of the preceding three years, throughout hazmat employment and for 90 days thereafter.
Source: PHMSA Training Requirements for Industry, updated October 8, 2024; employer training records; 172.704. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Which abbreviation is expressly allowed in the shipping-paper rules when it is commonly accepted and recognizable?
Correct answer: A packaging-type abbreviation such as cyl. for cylinder.
Commonly recognized packaging-type abbreviations and measurement units can be used. This does not authorize improvised abbreviations in the required material description.
Source: 49 CFR 172.202(a)(7), (c)(1); also 172.201(a)(3). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
A required shipping paper spans three pages. How should the pages be identified?
Correct answer: Number them consecutively and show the total on page one.
Each page must be consecutively numbered, and the first must indicate the total, such as page 1 of 3.
Source: 49 CFR 172.201(c). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Where may the total quantity appear relative to the basic hazardous-material description?
Correct answer: Before or after the basic description.
Quantity and packaging information can appear before or after the basic description. They must not interrupt its prescribed sequence.
Source: 49 CFR 172.202(b), (c)(1). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
When a subsidiary hazard class must be shown on a shipping paper, where is its number entered?
Correct answer: In parentheses immediately after the primary hazard class.
Required subsidiary hazard numbers follow the primary class in parentheses. The rule includes exceptions when a corresponding subsidiary label is not required.
Source: 49 CFR 172.202(a)(3). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Which Hazardous Materials Table column supplies the identification number used in the basic shipping description?
Correct answer: Column 4, which supplies the identification number.
The shipping-description rule directs the identification number to Column 4 of the Hazardous Materials Table. That number does not replace the other required basic-description elements.
Source: 49 CFR 172.202(a)(1). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Which Hazardous Materials Table column gives the proper shipping name?
Correct answer: Column 2.
The shipping-description rule requires the proper shipping name prescribed in Column 2 of the Hazardous Materials Table. The identification number and hazard class come from different columns.
Source: 49 CFR 172.202(a)(2). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Absent an applicable exception, where must required placards be displayed on a transport vehicle containing hazardous materials?
Correct answer: On each side and each end.
The general rule specifies each side and each end, with the placards appropriate to the material. Other provisions contain visibility, combination-vehicle and packaging exceptions.
Source: 49 CFR 172.504(a). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
A highway shipment contains 200 pounds of Division 4.3 material with no applicable exception. Does being below 1,001 pounds remove its placarding requirement?
Correct answer: No; Division 4.3 is in Table 1.
Division 4.3 is a Table 1 hazard. The general less-than-1,001-pound exception for certain Table 2 non-bulk loads does not apply.
Source: 49 CFR 172.504(a), (c), (e) Table 1, Division 4.3. eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
For a domestic Class 9 shipment in bulk packaging, what is true even though a CLASS 9 placard is not required?
Correct answer: The bulk packaging still needs the appropriate identification-number marking.
The domestic placard exception does not remove bulk identification marking. The number can appear on the authorized Class 9 placard, orange panel or white square-on-point display.
Source: 49 CFR 172.504(f)(9). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
For a tractor and cargo body, may the required front placard be displayed on the front of the truck-tractor?
Correct answer: Yes; it may be there instead of or in addition to the cargo-body front.
The rule expressly allows the required front display on the tractor. Other applicable placarding and visibility requirements remain.
Source: 49 CFR 172.516(b). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
The only emergency-response instructions are sealed inside a package containing hazardous material. Does this meet the required access standard?
Correct answer: No; the information must be available away from the package and immediately accessible as required.
Emergency-response information must be available away from the package and immediately accessible to the people who must use it. Storing the only instructions inside the hazardous package does not meet that purpose.
Source: 49 CFR 172.602(b)(2), (c)(1); current renumbered access provisions. eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
While belted at the controls, where must a driver keep required hazardous-material shipping papers?
Correct answer: Within immediate reach, and visible to an entering person or in the inside driver-door holder.
The driver must be able to reach the paper while restrained by the lap belt. It must also be readily visible to someone entering the compartment or kept in the holder on the inside of the driver-side door.
Source: 49 CFR 177.817(e)(2)(i). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Before a covered shipment is offered, what must the customer registered with an outside emergency-response provider ensure?
Correct answer: The provider has received current information about the material.
The registered person must give the emergency-response provider current material information before offering the shipment. Listing a provider number alone does not ensure that useful response information is available.
Source: 49 CFR 172.604(b)(2). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
A trained driver notices that a required basic description is visibly missing from the supplied shipping paper. May the carrier ignore this because the shipper prepared it?
Correct answer: No; reliance on the shipper does not excuse an apparent error found through reasonable care.
PHMSA distinguishes the offeror responsibility for classification from carrier acceptance duties. Drivers trained for these functions are expected to review apparent requirements, including the visible basic description.
Source: PHMSA interpretation 26-0043, August 17, 2026; reasonable reliance and apparent requirements; 171.2(f), 177.817(a). Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
A carrier uses a separate emergency-response guidance document. How must its instructions relate to the hazardous shipment?
Correct answer: They must cross-reference the hazardous-material description on the shipping paper.
A separate guidance document is an allowed format only when the required relationship identifies the response information for the material described. An unrelated guide does not provide the required shipment-specific information.
Source: 49 CFR 172.602(b)(3)(iii). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
Under current 172.602, is emergency-response information disqualified solely because it is electronic rather than printed on paper?
Correct answer: No; electronic format is allowed, with the required content and accessibility.
The current provision permits legible English information in paper or electronic format. Content, access away from the package and immediate accessibility still apply. This is not a blanket authorization to replace required highway shipping papers.
Source: 49 CFR 172.602(b)(1)–(3), (c)(1); separate highway-paper duties under 177.817(e). eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered transportation; not Alabama licensing or an exception determination. ↗
