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Liquid or solid substances that emit toxic, dangerous, and irritating fumes are
known as:

poisonous materials.

The DOT Hazard Class 2 includes:

nonflammable gases.

You arrive on the scene of a vehicle accident involving a cargo tank truck carrying gasoline. The truck is leaking its product into a small lake. The driver of the truck gives you an MSDS sheet on gasoline, which gives a specific gravity of 0.8. With this information, you can predict that the product will:

remain on top of the water, as it is lighter than the water.

An advantage of confinement operations is that:

direct exposure of personnel is avoided.

Which of the following correctly identifies the purpose, advantages, and limitations of structural firefighting protective clothing at hazardous materials incidents?

Protection from heat, moisture and ordinary hazards associated with
firefighting; provides thermal, impact, and cut/abrasion protection;
offers limited chemical protection.

Statement 1: A person may be exposed to large quantities of a hazardous
material in concentrations that do not present a hazard or
to small amounts of a hazardous material that present a
very high hazard.

Statement 2: A person exposed to a hazardous material may not necessarily
be contaminated by it.

Statement 3: Responders working in the hot zone may become contaminated
during control operations. If they then carry that contamination
outside the hot zone, they may contaminate others.

Statement 1: A person may be exposed to large quantities of a hazardous
material in concentrations that do not present a hazard or
to small amounts of a hazardous material that present a
very high hazard.

Statement 2: A person exposed to a hazardous material may not necessarily
be contaminated by it.

Statement 3: Responders working in the hot zone may become contaminated
during control operations. If they then carry that contamination
outside the hot zone, they may contaminate others.

There are many limitations for personnel working in SCBA. Of the following, all
are limitations except

wearers do not have to be medically certified to wear a SCBA.

The following limitations are indicative of what type of chemical vapor suit?
1. SCBA exposed to the atmosphere without protection

2. Facepiece compatibility may not be equivalent to suit compatibility.

3. The chemical compatibility of belts, straps & harnesses
may not be known.

Level B, with SCBA (Type 2)

Prior to entry into a confined space, defensive actions taken should include:

diking or remote closing a valve.

The elapsed time between initial contact of a chemical with the outside surface of
the chemical protective equipment and detection at the inside surface of the material
is called:

breakthrough time.

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