fire

Which type of building construction offers the highest level of fire and structural protection?

Type I — Fire-Resistive

In which type of construction are interior structural members combustible but exterior walls noncombustible?

Type III

Which type of construction uses large-dimension lumber that provides structural strength and limited concealed spaces?

Type IV

Type V construction is most commonly found in:

Single-family dwellings and small apartments

What is the greatest hazard associated with lightweight truss systems in modern buildings?

Early structural collapse

What is a fire-resistance rating?

The maximum time a material or assembly can withstand fire exposure in a test environment

Why are void spaces inside walls and ceilings dangerous during a fire?

They allow fire to spread unseen

During fireground operations, rain roofs pose a hazard because they:

 Create concealed voids where fire can spread undetected

What does the term dead load refer to?

 The weight of the building itself and any permanently attached materials

When conducting size-up, identifying the type of construction helps firefighters:

 Predict fire behavior and potential collapse hazards

Which of the following is not part of the basic fire triangle?

 Chemical chain reaction

What is the term for the minimum temperature at which a fuel-air mixture will ignite without an external flame or spark?

Autoignition temperature

Which of these best describes the “upper explosive (flammable) limit (UEL)”?

The highest concentration of fuel in air above which combustion cannot occur

Which statement about products of combustion is accurate?

 Exposure to smoke and toxic gases causes most fire-related deaths.

Which transfer of heat mechanism is LARGELY dependent on the movement of heated gases or liquids from one place to another?

Convection

What is the primary factor determining how easily a solid fuel will ignite?

The surface-to-mass ratio of the fuel

Which of the following is the first stage of compartment fire development?

Incipient

In a compartment fire with no opening for lateral expansion of hot gases, how will the hot gases travel?

They will collect at the ceiling and proceed downward.

If a fire becomes “ventilation-limited,” what is the implication?

The fire growth slows because oxygen supply is restricted.

Which of the following best describes the “fire tetrahedron” that expands on the traditional fire triangle?

Fuel, heat, oxygen, and chemical chain reaction

Which NFPA standard regulates the minimum design, performance, and certification requirements for structural firefighting protective clothing (coat, trousers, etc.)?

NFPA 1971

Station and work uniforms (non-turnout gear) must provide a layer of protection against direct flame contact and must avoid garments made of which material?

Non-fire-resistant synthetics

Protective coats for structural firefighting are composed of three primary components. Which of the following is not one of them?

Hard outer composite plate

When wearing the helmet, besides the helmet-mounted face shield, the firefighter should also wear:

A form of primary eye protection

What is the main function of the Drag Rescue Device (DRD) on the protective coat?

Provide an anchor point for lifting/co-dragging a downed firefighter

Which of these practices is correct after each use of a Self-Contained Breathing Apparatus (SCBA) facepiece?

Wash with warm water and a mild disinfectant

What is one of the hazards of wearing protective clothing that has trapped sweat and moisture?

It can significantly increase breathing and heart rate

Hearing protection may be required when riding apparatus because of excessive noise exposure. But in which operation might wearing hearing protection be impractical or dangerous?

Attempting to locate a trapped victim inside a structure

According to the material, changing, adding, or removing components of protective clothing (for example adding unapproved patches, altering closures) may:

Endanger a firefighter’s life

Why must protective clothing be cleaned and inspected after each use?

Because hydrocarbon contamination will reduce the fire resistance of the protective clothing