TB 001: Exploring The Use Of 1” Hose In Firefighting Flashcards
1
Q
“Indirect Method”
A
The cooling of the area directly above the fire, in a confined space, using a fine spray or fog stream
2
Q
“Indirect Method” PLAN OF ATTACK
A
- using a single 1” line with sufficeint length to cover the structure
- NO ventilation, control horizontal ventilation
- apply stream through door or window
- direct water above seat of fire and near the ceiling
3
Q
When is the “Indirect Method” most effective?
A
When the conditions were right of the structure (tightness) and very little water was used to knock down the fire.
4
Q
When is the “indirect method” of water practical?
A
@ 125 psi engine pressure
BUT, efficiency is increased with higher pressure
5
Q
Who was the trial test done through?
A
Cooperation of city housing authority
6
Q
Use wide angle or a ___ degree cone spray.
A
30
7
Q
What were the test nozzle pressures?
A
125, 250, 400 psi
8
Q
TWO conditions necessary for SUCCESSFUL use of “indirect method”
A
- A fire area which has NOT been vented vertically
- A hot fire with an accumulation of heat
9
Q
TWO basic principles of FF that “indirect method” DEVIATES from
A
- Water is NOT applied at the seat of the fire, but ABOVE the fire through the hot gases and near the ceiling
- ALL vertical ventilation is delayed until AFTER fire is KD
