Ventilation

Question 1

What is a Ventilation Induced Flashover?

Answer 1

Flashover initiated by the intro of O2 into a pre-heated, fuel rich (smoke filled) oxygen deficient area. Occurs in legacy fires, but much more prevalent with modern content fires.

Question 2

Ventilation Limited Fire vs Fuel Limited Fire

Answer 2

Vent limited: Fire regulated by O2 within in the space

Fuel Limited Fire: controlled by characteristics of fuel because there is adequate O2 available for combustion

Question 3

If smoke and fire are venting downward, horizontally, or pulsing from an opening in the bldg, this indicates _

Answer 3

Wind impacted. Any unusual vent profile must be immediately communicated to Lad Off inside fire area to vented and IC

Question 4

When can Roof FF initiate vertical vent tactics?

Answer 4

Must be coordinated with Door Control of the fire area. If Roof FF does NOT hear “door control” he must confirm with Lad Off that door is being controlled on fire fl before vertical vent can begin

Question 5

All horizontal vent tactics require communication with _

Answer 5

Ladder Officer operating inside the fire area to be vented.

Question 6

When can Horizontal Vent Tactics begin

Answer 6

Once a charged HL is advancing WITHIN the fire area and extinguishing the fire.

Question 7

May the Roof FF perform Vertical Ventilation without direct communication from Lad Off?

Answer 7

Yes upon hearing radio transmissions that the interior team has door control on the fire floor, or a charged HL is advancing into the fire apt.

Question 8

Define “Known Life Hazard”

Answer 8

Victim can be seen by rescuer
Victim can be heard by rescuer
Member has info from credible source or a person at the scene indicating the location of the life hazard. (Does NOT include reports from Dispatcher)

Question 9

Choose incorrect for Ventilation profile
A. Location where smoke or fire is venting from bldg
B. Evaluation of volume, pressure, and velocity of smoke venting from bldg
C. Amount of fire venting from bldg, including where fire or smoke is not venting out open windows
D. Fire and smoke should be venting outwards and upwards. If smoke and fire are venting downward, horizontally or pulsing from an opening, this indicates wind impacted
E. Any unusual vent profile must be immediately communicated to IC, who will decide which Off should be notified.

Answer 9

E Immediate communication to Lad Off inside fire area to be vented and IC

Question 10

Modern Content fire correct order

1. Rapid growth stage
2. Early oxygen limited decay stage
3. Incipient stage
4. Ventilation induced flashover
5. Secondary decay stage
6. Rapid second growth stage

A 3, 2, 4, 1, 5, 6
B. 1, 3, 4, 6, 5, 2
C. 3, 1, 2, 6, 4, 5
D. 2, 1, 3, 5, 4, 6

Answer 10

C

Question 11

Modern content fire type of of heat that absorbs by members’ PPE at a faster rate than other and puts members at a greater risk to burns
A. Radiant heat
B. Convection heat
C. Conduction

Answer 11

B The increased heat release rates of modern fires create more convective heat along the flow path from the fire area

Question 12

"Flashover" is the transition in the development of a compartment fire when surfaces exposed to thermal radiation from fire gases in excess of \_\_\_\_ degrees Fahrenheit reach ignition temperature more or less simultaneously.
A: 1000
B: 1100
C: 500
D: 2100

Answer 12

B FFP Ventilation Glossary