Free Firefighter Hazardous Materials Response Questions and Answers 1

Question 1

At a hazardous materials incident, a first responder uses the Emergency Response Guidebook (ERG) and knows the 4-digit UN identification number of the substance. Which section of the ERG should they consult first to identify the material and its corresponding guide number?

Accepted Answer

The yellow-bordered pages

Answer

The yellow-bordered pages of the ERG list hazardous materials in numerical order by their 4-digit UN/NA identification number. This allows for rapid identification of the substance and directs the responder to the appropriate orange guide page for initial actions.

Question 2

A firefighter responds to a tanker truck rollover. The truck displays a diamond-shaped placard that is red with a flame symbol and the number '3' at the bottom. This placard indicates the material is what type of hazard?

Accepted Answer

A flammable liquid

Answer

According to the DOT hazardous materials placarding system, a red placard with a flame symbol and the number '3' at the bottom specifically identifies a Class 3 hazardous material, which is defined as a flammable liquid.

Question 3

Which of the following activities is MOST appropriately conducted within the Warm Zone (Contamination Reduction Zone) of a hazardous materials incident?

Accepted Answer

Decontamination of personnel and equipment

Answer

The Warm Zone, also known as the Contamination Reduction Zone, is established as a buffer between the Hot (Exclusion) Zone and the Cold (Support) Zone. Its primary purpose is to host decontamination procedures for personnel and equipment exiting the Hot Zone to prevent the spread of contaminants.

Question 4

According to NFPA 1072, a responder trained to the Operations level is expected to perform which of the following actions at a hazardous materials incident?

Accepted Answer

Perform defensive actions such as diking, damming, and diverting.

Answer

Responders at the Operations level are trained to take protective, defensive actions from a safe distance to control the spread of a hazardous material. These actions, such as building dikes or diverting a spill, are meant to confine the product without coming into direct contact with it. Offensive actions like plugging and patching are reserved for Technician-level responders.

Question 5

A hazardous gas is released into the atmosphere. If the material's Safety Data Sheet (SDS) indicates it has a vapor density of 1.8, where will the gas likely concentrate?

Accepted Answer

It will sink and accumulate in low-lying areas.

Answer

Vapor density is the weight of a gas or vapor compared to an equal volume of air, with air having a value of 1. A vapor density greater than 1, such as 1.8, means the gas is heavier than air and will sink, collecting in low spots like ditches, basements, and confined spaces.

Firefighter Practice Test

Firefighter Practice Test

Free Firefighter Hazardous Materials Response Questions and Answers 1