Foam
Class A foams are used to extinguish fires involving:
ordinary combustibles.
The correct order of incident priorities is:
life safety, incident stabilization, property conservation.
Stones and concrete may lose small portions of their surface when heated, a condition called:
Spalling
In confined space rescue, what respiratory protective equipment do first responders usually use?
Supplied air respirator (SAR)
The search for the area of origin starts:
outside a structure.
The increase in volume of a foam solution when it is aerated is called:
foam expansion.
Specific details of incident communications such as radio frequencies, reporting procedures, and emergency communication will be dictated by:
local protocols.
Steel will support _____ or less than the designed load and could fail at any given time after flashover.
40%
What term is defined as "an excavation, narrow in relation to its length, made below the surface of the earth?"
Trench
To determine the fire cause, you must identify the:
ignition sequence.
The most common type of foam proportioner used in the fire service is the:
in-line eductor.
An operational plan to initiate fire control, conduct searches and rescues, and extinguish the fire with the intent to commence operations inside the fire building is a(an):
offensive strategy
Aluminum melts around:
1,220° F (660° C).
In water and ice rescues, the victim will almost certainly be suffering from:
hypothermia.
Which type of fuel requires the least amount of energy for ignition?
Gas
Which foam application method directs the foam stream on the ground near the front edge of a burning liquid spill?
Roll-on method
When transferring Command, the fire officer receiving command must:
Be on scene
Collapse potential increases in the fire growth stage as _____ in the upper levels of the space.
heat increases
What pulling tool is stronger, faster to deploy, and has a greater travel distance than its counterparts?
Winch
The first step in establishing the chain of custody of evidence is:
scene security.
When advancing to shut off liquid or gas control valves, _____ can be used for crew protection.
Fog Stream
In a structure fire with a single open doorway, the _____ is the lower portion of the doorway.
Air intake
The structural failure of a building or any portion of it, resulting from a fire, snow, wind, water, or damage from other forces, is referred to as:
Structural collapse
Modern seat belts include _____ that lock the belt during a crash to prevent further travel of the belt and the person wearing it.
pretensioners
Evidence that is destroyed, damaged, altered, or not preserved by someone with the responsibility to preserve it is known as:
spoliation.