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 Arkansas licensing or an exception determination. Agency source dated August 17, 2026. ↗
Under the general federal hazmat-employee training rule, how often is recurrent training required?
Correct answer: At least once every three years.
The general recurrent interval is at least once every three years. A revised required security plan can trigger training within 90 days of implementation, so three years is not permission to ignore earlier applicable training duties.
Source: 49 CFR 172.704(c)(2): recurrent training. Read and reviewed September 22, 2026. Federal covered highway transportation; not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
A new hazmat employee is still within the 90-day initial-training period. Which supervision condition permits covered duties before training is complete?
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: 49 CFR 172.704(c)(1): direct supervision and initial-training deadline. Read and reviewed September 22, 2026. Federal covered highway transportation; not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
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: 49 CFR 172.704(d): retention of current training records. Read and reviewed September 22, 2026. Federal covered highway transportation; not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
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). Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
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). Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
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). Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
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. Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
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). Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
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 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. Agency source dated August 17, 2026. ↗
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). Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
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). Read and reviewed September 22, 2026. Federal covered transportation; not Arkansas licensing or an exception determination. eCFR displayed through September 18, 2026. ↗
An ordinary hazardous-liquid cargo tank still contains product. One manhole is unsecured. May it be driven a short distance to the exit?
Correct answer: No; secure the manhole before moving the tank.
The cargo-tank rule requires manhole closures closed and secured regardless of the quantity carried, subject to its stated empty-tank exception. A short distance is not itself an exception.
Source: 49 CFR 177.834(j)(1); Read and reviewed September 22, 2026. Federal covered operations, not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
A truck containing Division 1.2 material is parked four feet from the traveled part of a public highway. Is this allowed under the parking rule?
Correct answer: No; it cannot be parked on or within five feet.
For a vehicle containing Division 1.1, 1.2 or 1.3 material, the parking rule prohibits parking on or within five feet of the traveled portion of a public street or highway. Four feet is inside that prohibited zone.
Source: 49 CFR 397.7(a)(1); Read and reviewed September 22, 2026. Federal covered operations, not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
A driver of a placarded Class 3 vehicle wants to park within five feet of the traveled roadway for personal shopping. Does the brief operational-necessity exception cover that stop?
Correct answer: No; personal shopping is not the stated operational necessity.
The exception requires a brief operational necessity and impracticability of parking elsewhere. It does not provide a general convenience-parking exemption.
Source: 49 CFR 397.7(b); Read and reviewed September 22, 2026. Federal covered operations, not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
A Division 1.1 vehicle is to be parked 200 feet from a dwelling, with no qualifying operational necessity. Is that within the prohibited zone?
Correct answer: Yes; the rule uses 300 feet in these circumstances.
The rule restricts parking within 300 feet of bridges, tunnels, dwellings and places where people work or assemble, with a narrowly stated brief operational exception.
Source: 49 CFR 397.7(a)(3); Read and reviewed September 22, 2026. Federal covered operations, not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
After making a required railroad stop, how should the driver choose a gear for crossing?
Correct answer: Choose one that allows the whole crossing without shifting.
The rule requires a gear that permits completing the crossing without a gear change and prohibits shifting while crossing.
Source: 49 CFR 392.10(a); Read and reviewed September 22, 2026. Federal covered operations, not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
A transportation incident meets 171.15's NRC telephone-report criteria. When must the person in physical possession notify the NRC?
Correct answer: As soon as practical, no later than 12 hours after occurrence.
The telephone deadline is as soon as practical and within 12 hours. This is not permission to delay emergency assistance; the detailed written report has a separate deadline.
Source: 49 CFR 171.15(a): immediate NRC notice. Read and reviewed September 22, 2026. Federal covered highway transportation; not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
As a direct result of hazardous cargo, an incident closes an interstate on-ramp for exactly one hour while the main lanes stay open. Does it meet the road-closure reporting trigger?
Correct answer: Yes; the one-hour-or-more rule includes access ramps.
PHMSA treats highway access ramps as parts of a major transportation artery. Closure for one hour or more can trigger NRC notice; exactly one hour qualifies, even when the main lanes remain open.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; questions 5 and 16; 171.15(b)(1)(iv). Agency guidance, not a new substantive rule. Read and reviewed September 22, 2026. Federal covered operations, not Arkansas licensing or a complete operational checklist. Agency source dated September 7, 2023. The one-hour threshold was also checked in 49 CFR 171.15(b)(1)(iv). ↗
After filing a required detailed hazardous-material incident report, how long must the reporting person retain a copy?
Correct answer: Two years, with the required access for an authorized DOT request.
The rule requires retaining a copy for two years at the principal place of business. If stored elsewhere, it must be made available there within 24 hours of an authorized DOT request. Filing does not remove the retention obligation.
Source: 49 CFR 171.16(b)(3): incident-report retention and access. Read and reviewed September 22, 2026. Federal covered highway transportation; not Arkansas licensing or a complete operational checklist. eCFR displayed through September 18, 2026. ↗
