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 22, 2026. Federal covered transportation; not Louisiana 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 22, 2026. Federal covered transportation; not Louisiana 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 22, 2026. Federal covered transportation; not Louisiana 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 22, 2026. Federal covered transportation; not Louisiana licensing or an exception determination. ↗
Which employees need the applicable in-depth security training in addition to general security awareness?
Correct answer: Employees covered by a required hazardous-material security plan.
PHMSA lists general security awareness among hazmat training subjects and in-depth security training when a security plan is required. The training must match the employee's covered duties.
Source: PHMSA Training Requirements for Industry, updated October 8, 2024; in-depth security training. Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana licensing or an exception determination. ↗
For an ordinary highway shipment assigned a packing group, which basic-description order is correct?
Correct answer: Identification number, proper shipping name, hazard class, packing group.
The four basic elements must appear in the prescribed sequence, without unrelated information inserted between them. Authorized technical names and subsidiary hazards follow their specific rules.
Source: 49 CFR 172.202(a)(1)–(4), (b). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana licensing or an exception determination. ↗
Hazardous and nonhazardous freight appear on one shipping paper. Which is an accepted way to identify the hazardous entries?
Correct answer: Put an X before their basic descriptions in an HM column.
An X before the basic description in an HM column is one accepted method. Listing hazardous entries first or using the prescribed contrasting color are alternatives; marking only the total weight is insufficient.
Source: 49 CFR 172.201(a)(1). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana licensing or an exception determination. ↗
What language must the required hazardous-material shipping description use for covered U.S. transportation?
Correct answer: Legible English.
The required shipping description and transport copies must be legible and printed manually or mechanically in English.
Source: 49 CFR 172.201(a)(2). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana 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). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana 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). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana 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). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana 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). Read and reviewed September 22, 2026. Federal covered transportation; not Louisiana licensing or an exception determination. ↗
