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 21, 2026. Federal covered transportation; not Alabama 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). 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. ↗
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). 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. ↗
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). 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 material's table entry has no assigned packing group. Should the driver invent a packing group to fill the description?
Correct answer: No; apply the entry's requirements without inventing one.
Packing groups are shown when assigned and required. The rules specifically except entries with no assigned group and several named categories.
Source: 49 CFR 172.202(a)(4). 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 shipper uses an outside emergency-response telephone service. What associated identification must appear as prescribed on the paper?
Correct answer: The registered person's name or assigned contract or unique identifier.
The shipping paper must identify the registered customer by name or the contract or unique identifier assigned by the emergency-response provider. This links the call to the correct shipment information.
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. ↗
Which information must be included in the required emergency-response information?
Correct answer: Health hazards, fire risks and preliminary first-aid measures.
The required information also includes the material description, immediate precautions, and initial methods for fires, spills and leaks. It must be immediately accessible for an incident.
Source: 49 CFR 172.602(a), (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. ↗
For a non-waste hazardous-material shipment, how long must a receiving motor carrier retain the required shipping-paper copy?
Correct answer: One year after the carrier accepts the material.
The receiving motor carrier keeps the required non-waste shipping-paper copy for one year after acceptance. Its hazardous-waste shipping papers have a separate three-year period under 177.817(f).
Source: 49 CFR 177.817(f); receiving carrier, not provider retention under 172.201(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. ↗
A truck carries 900 pounds aggregate gross weight of ordinary Class 3 material in non-bulk packages. No subsidiary-hazard or other special requirement applies. What does 172.504(c) permit?
Correct answer: Transport without a placard under the stated weight exception.
The exception is for less than 1,001 pounds aggregate gross weight of Table 2 hazardous material in the stated circumstances. It does not erase other hazardous-material requirements.
Source: 49 CFR 172.504(c), (e) Table 2, Class 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. ↗
Can a bulk package rely on the general less-than-1,001-pound Table 2 placarding exception merely because it contains little material?
Correct answer: No; that exception expressly excludes bulk packagings.
Bulk-packaging and special subsidiary-hazard rules must be checked separately. The non-bulk aggregate-weight exception is not a general small-residue exemption for tanks.
Source: 49 CFR 172.504(c), (d). 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 vehicle carries qualifying non-bulk packages from two Table 2 categories requiring different placards. Neither category reaches 2,205 pounds loaded at one facility. Which option may be available?
Correct answer: A DANGEROUS placard instead of their separate Table 2 placards.
172.504(b) allows the DANGEROUS option for the stated mixed non-bulk Table 2 load. It does not replace Table 1 or other separate requirements.
Source: 49 CFR 172.504(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. ↗
A qualifying mixed non-bulk load uses DANGEROUS placards. One facility loads 2,300 pounds aggregate gross weight of Class 8 material. What additional category display is required?
Correct answer: The CORROSIVE placard for that category.
When at least 2,205 pounds of one Table 2 category is loaded at one facility, its specified category placard must be applied.
Source: 49 CFR 172.504(b), (e) Table 2, Class 8. 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. ↗
You leave the controls of a truck carrying a load subject to the shipping-paper rule. Which location is expressly permitted for those papers?
Correct answer: On the driver seat or in the holder inside the driver-side door.
When the driver is away from the controls, the rule specifies the driver seat or inside driver-door holder. This helps authorities find the required information during an incident or inspection.
Source: 49 CFR 177.817(e)(2)(ii). 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. ↗
Required hazardous-material shipping papers are carried with several unrelated documents. How should they be distinguished?
Correct answer: Place them first or mark them with a distinctive tab.
The hazardous-material shipping paper must be recognizable as well as accessible. A distinctive tab or placing it first satisfies the stated identification method when it is carried with other papers.
Source: 49 CFR 177.817(e)(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. ↗
A shipment requires an emergency-response telephone number. The listed number only records a message for a later callback. Is that sufficient?
Correct answer: No; the number must provide the required immediate access to knowledgeable help.
A callback-only service does not meet this requirement. The monitored contact must know the material and response information or have immediate access to someone who does.
Source: 49 CFR 172.604(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. ↗
A shipment subject to the emergency-phone rule is temporarily stored as part of transportation overnight. When must the listed number be monitored?
Correct answer: Throughout transportation, including this incidental storage.
Monitoring is required throughout transportation, including storage incidental to transportation. An overnight pause in vehicle movement does not end that obligation.
Source: 49 CFR 172.604(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. ↗
Road spray has substantially obscured the required placard lettering and color. What should be done before continuing with that condition?
Correct answer: Restore the placard to a clearly legible and visible condition.
The carrier must maintain placard format, legibility, color and visibility. Substantial obscurement by dirt is not excused by having correct shipping papers.
Source: 49 CFR 172.516(c)(6). 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 fitted ladder covers part of a required placard. Is the display acceptable merely because the placard is securely fastened?
Correct answer: No; placards must be clear of obstructions such as ladders and pipes.
Secure attachment and an unobstructed display are separate requirements. The rule specifically identifies ladders, pipes, doors and tarpaulins as equipment to keep clear of the placard.
Source: 49 CFR 172.516(c)(1)–(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. ↗
An advertisement is one inch from a required placard. What minimum separation does the display rule specify from such marking?
Correct answer: At least three inches, and farther if needed to avoid substantially reducing effectiveness.
Placards must be away from markings that substantially reduce their effectiveness, and in any case at least three inches from such marking. The numerical minimum does not excuse a confusing display.
Source: 49 CFR 172.516(c)(4). 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 words on a required placard are sideways after installation. How should the placard be oriented?
Correct answer: With its words or authorized identification number horizontal, reading left to right.
The display rule requires words or an authorized identification number to read horizontally from left to right. Correct content must also be displayed in the required orientation.
Source: 49 CFR 172.516(c)(5). 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. ↗
