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Materiales peligrosos · página 8 de 8

Preguntas de Materiales peligrosos 141–159

Parte del banco de 159 preguntas de Materiales peligrosos. Cada respuesta cita el Manual CDL de FMCSA o la norma federal de donde proviene.

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  1. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 171.8, when is a packaging used as a receptacle for hazardous solid material bulk packaging?

    • AWhen its maximum net mass is more than 400 kg (882 pounds), regardless of capacity
    • BWhen its maximum capacity is more than 450 L (119 gallons), regardless of net mass
    • CWhen its water capacity is more than 454 kg (1,000 pounds)
    • DWhen its maximum net mass is more than 400 kg (882 pounds) and its maximum capacity is more than 450 L (119 gallons)Correcta

    For a solid receptacle, both limits must be exceeded: maximum net mass greater than 400 kg (882 pounds) and maximum capacity greater than 450 L (119 gallons).

    eCFR 49 CFR 171.8 · Definition of Bulk packaging, paragraph (2) · verificado 2026-09-07

  2. Traducción en revisión. Se muestra el contenido actualizado en inglés. For a gas receptacle, what water capacity must be exceeded for it to be bulk packaging under the federal definition?

    • A1,000 pounds (454 kilograms)Correcta
    • B100 pounds (45 kilograms)
    • C10,000 pounds (4,536 kilograms)
    • D500 pounds (227 kilograms)

    For a gas receptacle, bulk packaging has a water capacity greater than 454 kilograms (1,000 pounds). A gas receptacle at or below that water capacity is non-bulk under the definition.

    eCFR 49 CFR 171.8 · 49 CFR 171.8: bulk packaging definition for a gas · verificado 2026-09-08

  3. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 172.504(c), what aggregate gross weight can qualify a highway or rail shipment of Table 2 hazardous materials for the stated placarding exception?

    • ALess than 454 kg (1,001 pounds), subject to the section’s bulk-packaging and § 172.505 exclusionsCorrecta
    • BExactly 454 kg (1,001 pounds), regardless of packaging
    • C5,000 pounds per hazard class
    • DThere is no weight-based Table 2 exception

    For highway or rail transportation, section 172.504(c) provides the Table 2 exception below 454 kg (1,001 pounds) aggregate gross weight. It does not apply to bulk packagings or materials subject to section 172.505; other placarding provisions still apply.

    eCFR 49 CFR 172.504 · 172.504(c): less-than-454 kg (1,001 pounds) Table 2 exception and stated exclusions · verificado 2026-09-07

  4. Traducción en revisión. Se muestra el contenido actualizado en inglés. Does the under-1,001-pound placard exemption for Table 2 materials apply to bulk packagings?

    • AYes, but only for liquids, not solids or gases
    • BYes, bulk packagings follow the same weight exemption
    • CNo; that exemption is limited to non-bulk packagesCorrecta
    • DNo such exemption exists for any packaging type

    The under-1,001-pound Table 2 exemption in 49 CFR 172.504(c) is limited to non-bulk packages. Bulk packagings do not qualify for that specific exemption; other exceptions in the regulations may still apply.

    Electronic Code of Federal Regulations · 49 CFR 172.504(a), (c) · verificado 2026-09-08

  5. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 172.800, which material triggers the federal transportation security-plan rule at any quantity, subject to the section’s stated applicability and exceptions?

    • AA single nonbulk oxidizer
    • BA single drum of Class 8 corrosive material
    • CAny quantity of Division 4.1 material
    • DAny quantity of material poisonous by inhalationCorrecta

    Section 172.800 lists any quantity of material poisonous by inhalation and Division 1.1, 1.2, and 1.3 explosives. Other listed materials have different thresholds. The section applies to persons offering or transporting listed material and includes stated exceptions.

    eCFR 49 CFR 172.800 · 172.800(b)(1), (5), and (c): security-plan applicability for explosives, PIH, and stated exceptions · verificado 2026-09-07

  6. Traducción en revisión. Se muestra el contenido actualizado en inglés. For a security plan required by 49 CFR 172.800, which three minimum elements must the plan include under 49 CFR 172.802(a)?

    • APersonnel security, unauthorized access, and en route securityCorrecta
    • BFuel efficiency, route mileage, and delivery scheduling
    • CVehicle paint color, cab comfort, and radio equipment
    • DCustomer billing, invoice accuracy, and payment terms

    At a minimum, the security plan must address personnel security, unauthorized access, and en route security. It must also assess transportation security risks and include other listed plan components.

    eCFR 49 CFR 172.802 · 172.802(a)(1)-(3): personnel security, unauthorized access, and en route security · verificado 2026-09-07

  7. Traducción en revisión. Se muestra el contenido actualizado en inglés. For a placarded hazmat load outside a non-radioactive hazmat routing designation, may a carrier use operating convenience alone to choose a route through a tunnel or crowded area?

    • AYes, convenience is always an acceptable reason
    • BNo, operating convenience is not a basis for that determinationCorrecta
    • CYes, as long as the driver has five years of experience
    • DNo, placarded loads may never enter a restricted area for any reason

    The rule states that operating convenience is not a basis for deciding whether a route through the listed areas is practicable. The separate exceptions in the rule still apply.

    eCFR 49 CFR 397.67(b)-(c) · 397.67(b)-(c): practicability and operating convenience · verificado 2026-09-07

  8. Traducción en revisión. Se muestra el contenido actualizado en inglés. When both primary and subsidiary hazard labels are required on a package, how must they be displayed under 49 CFR 172.406?

    • AOn opposite sides of the package
    • BNext to each other, within 150 mm (6 inches) of one anotherCorrecta
    • COnly the primary label must be displayed
    • DOne label on the package and the other only on shipping papers

    When primary and subsidiary hazard labels are required, section 172.406(c) requires them to be displayed next to each other. They meet that rule when they are within 150 mm (6 inches) of one another.

    eCFR 49 CFR 172.406 · 172.406(c): placement of primary and subsidiary hazard labels · verificado 2026-09-07

  9. Traducción en revisión. Se muestra el contenido actualizado en inglés. A person attending a vehicle under 49 CFR 397.5 is not on the vehicle. Which condition meets the distance-and-view path of the definition?

    • AWithin 10 feet, whether or not the vehicle is visible
    • BWithin 500 feet, whether or not the vehicle is visible
    • CAnywhere on the same block
    • DWithin 100 feet with the vehicle in an unobstructed field of viewCorrecta

    The attended definition has two paths: the person is on the vehicle, awake, and outside a sleeper berth; or the person is within 100 feet and has the vehicle in an unobstructed field of view. This question tests the second path only.

    eCFR 49 CFR 397.5 · 397.5(d)(1)-(2): attended definition and qualified representative · verificado 2026-09-07

  10. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 397.5, does a person asleep in a sleeper berth meet the on-vehicle path of the attended definition?

    • ANo; the person on the vehicle must be awake and not in a sleeper berthCorrecta
    • BYes; being inside the vehicle is always enough
    • CYes; locked doors create attendance
    • DNo; only a second driver can attend a vehicle

    The on-vehicle path requires the person in charge to be awake and not in a sleeper berth. A separate path allows a person within 100 feet who has an unobstructed field of view; it does not make a sleeping person an attendant.

    eCFR 49 CFR 397.5 · 397.5(d)(1)-(2): attended definition and qualified representative · verificado 2026-09-07

  11. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 172.800, which shipment type can require a federal transportation security plan because it uses a single bulk packaging above the stated threshold?

    • AA shipment of clean, empty packaging with no hazardous-material residue
    • BA listed material in one bulk packaging with capacity greater than 3,000 kg for solids or greater than 3,000 liters for liquids or gasesCorrecta
    • CA single case of road flares carried for roadside emergencies
    • DAny load under 50 pounds total, regardless of hazard class

    Section 172.800 includes specified listed materials in a single bulk packaging with a capacity greater than 3,000 kg for solids or greater than 3,000 liters for liquids or gases. The material and applicability conditions in the section still control.

    eCFR 49 CFR 172.800 · 172.800(b): listed material in a single bulk packaging above the stated capacity threshold · verificado 2026-09-07

  12. Traducción en revisión. Se muestra el contenido actualizado en inglés. In the 49 CFR 172.504 Table 1 placarding categories, which listed division is “DANGEROUS WHEN WET”?

    • AClass 8, corrosive materials
    • BDivision 4.1, flammable solids
    • CDivision 4.3, dangerous-when-wet materialsCorrecta
    • DClass 9, miscellaneous hazardous materials

    Table 1 lists Division 4.3 with the DANGEROUS WHEN WET placard. Table 1 categories are subject to the section’s general and additional placarding provisions.

    eCFR 49 CFR 172.504 · 172.504(a), (e) Table 1: Division 4.3 DANGEROUS WHEN WET placard · verificado 2026-09-07

  13. Traducción en revisión. Se muestra el contenido actualizado en inglés. Which requirement applies to a qualified motor-carrier representative who attends a vehicle under 49 CFR 397.5?

    • AThey must be able to contact the shipper by phone
    • BThey must hold a hazmat endorsement
    • CThey must carry the driver’s logbook
    • DThey must be authorized to move the vehicle and have the means and ability to do soCorrecta

    A qualified representative is designated by the carrier, knows the hazardous materials, has emergency instructions, and is authorized, equipped, and able to move the vehicle. A person who only watches the vehicle does not meet the definition.

    eCFR 49 CFR 397.5 · 397.5(d)(1)-(2): attended definition and qualified representative · verificado 2026-09-07

  14. Traducción en revisión. Se muestra el contenido actualizado en inglés. In the 49 CFR 172.101 Hazardous Materials Table, what material is identified by UN1203?

    • AGasoline, a Class 3 flammable liquidCorrecta
    • BA Class 8 corrosive
    • CRadioactive material
    • DA non-hazardous food-grade product

    The table lists Gasoline with hazard class 3 and identification number UN1203, packing group II.

    eCFR 49 CFR 172.101 · Hazardous Materials Table, UN1203 Gasoline · verificado 2026-09-25

  15. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 171.15(a), when must the person in physical possession give NRC telephone notice of an incident listed in paragraph (b)?

    • AAs soon as practical, within 72 hours
    • BAs soon as practical, but no later than 12 hours after the incident occursCorrecta
    • CAt the end of the shift, regardless of when the incident occurred
    • DOnly with the written incident report

    This deadline applies to listed incidents during transportation, including loading, unloading, and temporary storage. Do not wait until hour 12 when earlier notice is practical. Separate EPA hazardous-substance release rules can require notice upon knowledge of a reportable release.

    eCFR 49 CFR · 171.15(a) and (b): telephone notice for listed incidents · verificado 2026-09-07

  16. Traducción en revisión. Se muestra el contenido actualizado en inglés. Under 49 CFR 171.16, which event during transportation requires the detailed federal incident report?

    • AOnly a release on a public highway
    • BOnly a release that injures someone
    • CAny unintentional release of a hazardous materialCorrecta
    • DOnly a release the shipper reports first

    The detailed report covers any unintentional hazardous-material release or any hazardous-waste discharge during transportation. It can be required even when the event did not require telephone notice under 49 CFR 171.15.

    eCFR 49 CFR 171.16 · 171.16(a): Detailed hazardous materials incident reports · verificado 2026-09-07

  17. Traducción en revisión. Se muestra el contenido actualizado en inglés. For an incident subject to 49 CFR 171.16, when is the detailed federal report due?

    • AWithin one year of the incident
    • BWithin 5 days of discovering the incident
    • CWithin 90 days of discovering the incident
    • DWithin 30 days of discovering the incidentCorrecta

    Submit the detailed Hazardous Materials Incident Report within 30 days of discovering the incident. The reporting person must retain a copy at its principal place of business for two years.

    eCFR 49 CFR 171.16 · 171.16(a)–(b): Filing and retention · verificado 2026-09-07

  18. Traducción en revisión. Se muestra el contenido actualizado en inglés. A marine-pollutant release exceeds 450 L of liquid or 400 kg of solid during transportation. When must NRC telephone notice be given?

    • AAs soon as practical, but no later than 12 hours after the incident occursCorrecta
    • BOnly at the end of the driver's shift
    • CWithin 30 days, with the detailed written report
    • DOnly after an inspector confirms the release

    A marine-pollutant release above 450 L (119 gallons) of liquid or 400 kg (882 pounds) of solid is a listed telephone-report event. Give NRC notice as soon as practical and no later than 12 hours after the incident occurs.

    eCFR 49 CFR 171.15 · 171.15(a) and (b)(4): Telephone notice; marine pollutants · verificado 2026-09-07

  19. Traducción en revisión. Se muestra el contenido actualizado en inglés. During a routine roadside stop with placarded material other than Division 1.1, 1.2, or 1.3 explosives, who must normally attend the vehicle?

    • AOnly the consignee’s staff
    • BIts driver, except while performing incident and necessary operator dutiesCorrecta
    • COnly a state inspector
    • DNobody if the placards can be seen

    Routine attendance means being awake on the vehicle outside the sleeper, or within 100 feet with an unobstructed view. This is not a safe isolation distance for an active leak; emergencies require hazard-specific precautions.

    eCFR 49 CFR · 397.5(c)–(d) · verificado 2026-09-07

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