A tool could damage a hazardous package's closure during unloading. Should it be used?
Correct answer: No; use handling equipment that will not damage containment.
Tools likely to impair a package or its closure must not be used. The restriction concerns damaging tools, not a blanket ban on handling equipment.
Source: 49 CFR 177.834(f); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A cargo-tank unloading operation uses the ordinary in-person attendance method, with no special exception or alternative system. How close must the qualified person remain?
Correct answer: Within 25 feet of the cargo tank.
The ordinary method requires the qualified person within 25 feet, alert, and with an unobstructed view of the cargo tank and delivery hose to the maximum extent practicable. Authorized alternative methods and product-specific exceptions have their own conditions.
Source: 49 CFR 177.834(i)(3)(i); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
For ordinary in-person cargo-tank attendance, which person is qualified?
Correct answer: One trained for the hazards and emergencies and able and authorized to move it.
The attendant must know the material's hazards and emergency procedures and have authority and means to move the tank under this attendance method.
Source: 49 CFR 177.834(i)(4); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
An approved remote cargo-tank monitoring system loses its monitoring capability during transfer. What must happen?
Correct answer: Terminate transfer immediately and restore compliant attendance.
The remote-system alternative requires immediate termination on loss of monitoring capability. A qualified person must immediately resume the required in-person attendance after remote-system failure.
Source: 49 CFR 177.834(i)(3)(ii)(C), (E); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
Before parking a Division 1.3 vehicle on private property, what must the person in charge of that property know and provide?
Correct answer: Awareness of the hazardous contents and consent to park.
Knowledge and consent must come from the person in charge of the property, who must be aware of the nature of the hazardous materials.
Source: 49 CFR 397.7(a)(2); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
How close may a vehicle carrying covered hazardous materials be parked to an open fire under 397.11?
Correct answer: It must not be parked within 300 feet.
The parking restriction is 300 feet. Passing an open fire is a separate issue requiring precautions to establish that the vehicle can safely pass without stopping.
Source: 49 CFR 397.11(a)–(b); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A placarded truck contains Class 3 flammable liquid. Someone stands 15 feet away with a lit cigarette. Is that far enough under the smoking rule?
Correct answer: No; the prohibited area extends to 25 feet.
397.13 prohibits smoking or carrying lit cigarettes, cigars or pipes on or within 25 feet of the listed hazardous-material vehicles.
Source: 49 CFR 397.13(a); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
An empty tank vehicle previously carried placard-required Class 3 flammable liquid. Does emptying the liquid by itself remove the 25-foot smoking restriction?
Correct answer: No; the rule also covers this empty tank vehicle.
The rule expressly covers an empty tank motor vehicle used for the specified flammable liquid or gas service when marking or placarding was required.
Source: 49 CFR 397.13(b); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A covered hazmat truck has a flat tire. Where may it be driven under the repair-location exception?
Correct answer: To the nearest safe place for the necessary repair.
The tire must be repaired, replaced or properly inflated before driving, except travel to the nearest safe place to perform that work. Other safe-operation requirements still apply.
Source: 49 CFR 397.17(b); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A tire on a covered hazmat vehicle is found overheated. What must be resolved before further operation?
Correct answer: The cause of the overheating must be corrected.
The driver must cause the overheated tire to be removed to a safe distance and correct the cause before operating again. Arrange qualified help and maintain applicable parking and attendance precautions.
Source: 49 CFR 397.17(c)–(d); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A Class 3 placard-required truck approaches an ordinary railroad grade crossing with no applicable exception. Where must it stop?
Correct answer: Between 15 and 50 feet from the tracks.
For a covered vehicle, stop within 50 feet but not closer than 15, then look and listen. Use a gear that allows crossing without shifting.
Source: 49 CFR 392.10(a), (a)(3)(vi), (b); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A cargo tank formerly used to transport hazardous material is empty. At an ordinary grade crossing with no applicable exception, does empty status alone remove the federal stop requirement?
Correct answer: No; the rule includes loaded and empty hazardous-material cargo tanks.
392.10(a)(4) expressly covers such cargo tanks whether loaded or empty. The specific crossing exceptions in paragraph (b) must be considered separately.
Source: 49 CFR 392.10(a)(4), (b); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
After an incident covered by 171.16, what is the ordinary deadline for the detailed hazardous-material incident report?
Correct answer: Within 30 days of discovering the incident.
The person in physical possession at the incident must submit the required DOT Form F 5800.1 within 30 days of discovery. This is separate from any prompt emergency call and NRC telephone notice.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; questions 1–2; 171.16(a). Agency guidance, not a new substantive rule. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
Undeclared hazardous material is discovered during transportation, without leakage. Is a detailed incident report required?
Correct answer: Yes; discovery during transportation itself requires the detailed report.
PHMSA explains reporting for undeclared hazardous material discovered during transportation even when nothing was released. Provide the available facts and identify unknown information rather than waiting for a spill.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; questions 7–8; 171.16(a). Agency guidance, not a new substantive rule. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A radioactive shipment's outer package breaks, but the inner receptacle remains intact. Does PHMSA require NRC notification?
Correct answer: Yes; the broken outer package is reportable despite the intact inner receptacle.
PHMSA's FAQ treats this outer-package breakage as reportable without requiring a release or overexposure.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; question 9; 171.15. Agency guidance, not a new substantive rule. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
At delivery, the driver stays and observes unloading when a reportable hazmat incident occurs. Who must file?
Correct answer: The carrier remains responsible while observing or participating in unloading.
PHMSA includes unloading while the carrier participates or observes within transportation for this reporting duty.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; question 6; transportation includes carrier-observed unloading. Agency guidance, not a new substantive rule. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
An ordinary loaded hazardous-liquid cargo tank has a leaking liquid-discharge valve. Its manholes are secured. May it depart?
Correct answer: No; applicable discharge valves and closures must also be closed and free of leaks.
Secured manholes do not excuse leaking discharge equipment. The rule separately addresses valves and liquid-discharge closures; special provisions for specified empty tanks or cryogenic-residue equipment do not authorize this ordinary loaded-tank leak.
Source: 49 CFR 177.834(j)(1)–(2); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
Before unloading an IBC under the applicable 177.834(h)(2) provisions, a hose shows significant bulging. What should the operator do?
Correct answer: Do not use the defective hose; arrange compliant equipment before transfer.
For this specified IBC or portable-tank operation, discharge components must be sound, leak-free and securely connected. A hose with significant bulging or another defect must not be used.
Source: 49 CFR 177.834(h)(2)(viii); eCFR displayed Title 49 current through September 17, 2026. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A truck hydraulic line leaks operating fluid, with no cargo release or other hazmat transportation incident. Does that alone require an HMR incident report as transported hazardous cargo?
Correct answer: No; other environmental or reporting laws can still apply.
PHMSA distinguishes fluids serving the vehicle fuel, hydraulic, cooling and lubrication systems from material transported in commerce. This HMR reporting distinction does not erase other legal duties or safe cleanup requirements.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; question 14; vehicle operating fluids and other reporting laws. Agency guidance, not a new substantive rule. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
A drum contains only hazardous-material residue when a transportation incident occurs. Is residue-only status by itself a general exemption from incident reporting?
Correct answer: No; apply the incident criteria and any specific reporting exceptions.
PHMSA explains that there is no general residue-only reporting exemption. Specific exceptions may apply, but calling a package empty or carrying less product does not itself remove the reporting duty.
Source: PHMSA Hazardous Materials Incident Reporting FAQ, updated September 7, 2023; question 17; residue packages and specific reporting exceptions. Agency guidance, not a new substantive rule. Read and reviewed September 21, 2026. Federal covered operations, not Alabama licensing or a complete operational checklist. ↗
