Safety Officer Chapter 6-3 Complete

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What is the main reason that has led to more severe content and structure fires according to the text?

Increased firefighter entrapments

Changes in the way buildings are constructed and the contents stored within them (correct)

Decrease in the quantity of smoke being produced

Obsolescence of the four-phase fire behavior model

Which phase of the ventilation-controlled fire behavior model often occurs when firefighters open a door for fire attack?

Fully developed

Initial growth

Explosive growth (correct)

Ventilation-limited

What is the primary culprit for the sheer quantity of smoke at a building fire?

Gasses

Pyrolysis (correct)

Particulates

Aerosols

Why can an explosive growth event render interior firefighting efforts useless?

Extreme heat-release rate of smoke ignition Signup and view all the answers

What is the term for a warning sign characterized by the intermittent ignition of small pockets of smoke, usually seen as fingers of flame dancing through the upper smoke layer?

Ghosting Signup and view all the answers

In fire behavior terms, what does 'flame-over' refer to?

Burning of the overhead smoke layer within a room Signup and view all the answers

What is a 'smoke explosion' in terms of a hostile fire event?

Sudden ignition and rapid expansion of a smoke pocket Signup and view all the answers

Which term describes the sudden occurrence when all the surfaces and contents of a space reach their ignition temperature almost simultaneously?

Flashover Signup and view all the answers

How do the four attributes of smoke contribute to understanding fire behavior within a building?

They provide insight into the toxicity and flammability of the smoke Signup and view all the answers

'Hostile fire event' refers to a phenomenon that can suddenly harm firefighters. Which of the following is NOT considered a hostile fire event according to the text?

Pyrolysis Signup and view all the answers

What are the factors that affect flow paths and compartmentalized fire growth?

Compartment size, interior geometry, continuity of the fire load, and size and status of exterior openings Signup and view all the answers

What is the ignition temperature required for smoke to start?

$450°F$ ($232°C$) Signup and view all the answers

Which hostile fire event is described as a spark-induced ignition of a smoke pocket away from the actual fire?

Smoke explosion Signup and view all the answers

What is the term used for the sudden detonation of oxygen-deficient smoke products within a closed, pressurized space?

Backdraft Signup and view all the answers

What is considered a warning sign of a flame-over event?

Turbulent smoke filling a room Signup and view all the answers

What does the color of smoke indicate according to the text?

Level of heating present Signup and view all the answers

What does black fire refer to?

A slang term for difficult firefighting situations Signup and view all the answers

What does laminar velocity indicate according to the text?

'White fire' condition Signup and view all the answers

"Reading smoke" refers to understanding what attribute of smoke?

$VVDC$ (Volume, Velocity, Density, Color) Signup and view all the answers

'Ghosting' in the context of hostile fire events refers to what phenomenon?

'Smoke flow paths moving faster than firefighters' Signup and view all the answers

What term is used for the more-or-less simultaneous ignition of all surfaces and contents in a room due to radiant heating?

Flashover Signup and view all the answers

What are some factors that can influence VVDC observations?

Compartment, size of flow path, outside weather, and firefighting efforts Signup and view all the answers