Hazardous Materials Transportation Flashcards

Under 49 CFR 171.15, a carrier must give telephonic notice to the National Response Center (NRC) when a hazmat release results in which condition?

Answer: A release that results in death, serious injury, evacuation, or significant property damage

Telephonic NRC notification is required when a hazmat incident causes death, serious bodily harm, evacuation of the general public, or significant property damage.

Which of the following materials is classified as a Division 1.1 explosive?

Answer: Black powder

Black powder is a Division 1.1 mass-explosion hazard explosive, subject to the strictest placarding and handling requirements.

What is the maximum speed permitted for a High-Hazard Flammable Train (HHFT) operating on a track segment through a high-threat urban area (HTUA)?

Answer: 40 mph

HM-251 limits HHFTs to 40 mph when operating through high-threat urban areas (HTUAs) as defined by TSA.

A rail car is marked with a four-digit number '1993' inside an orange panel. What does this number indicate?

Answer: The UN identification number for flammable liquids, NOS

UN 1993 is the UN identification number for 'Flammable liquids, n.o.s.' (not otherwise specified), used when no more specific entry applies.

Which type of tank car is specifically designed and required for transportation of chlorine by rail?

Answer: DOT-105J500W

DOT-105 pressure tank cars (specifically DOT-105J500W) are the required specification for chlorine transport due to their high-pressure design and puncture resistance.

Under FRA regulations, what must a railroad's operating rules specify regarding hazmat trains at affected locations during a derailment or accident?

Answer: Procedures for protecting the scene and notifying emergency responders including the 24-hour emergency contact

Railroad operating rules must include procedures for securing the accident scene and notifying the appropriate emergency contact number listed on the shipping papers.

What does the letters 'RQ' preceding a hazardous material entry on a shipping paper signify?

Answer: The quantity shipped meets or exceeds its DOT reportable quantity

'RQ' stands for Reportable Quantity, meaning a release of the material in that amount or more must be immediately reported to the NRC under CERCLA regulations.