202.12E Water Supply And Fire Stream Management Flashcards
True or false. Second supply line should be considered on any working incident.
True
First due companies approaching the scene with any evidence of a working fire in a structure do not have to lay their own supply line if?
Obvious critical rescue requiring a full crew, unsure of actual fire location in multiunit building complex, hydrant within 50 feet of the fire.
After initial arriving companies have established an adequate water supply newly arriving company should stage where?
On initial arriving companies hydrants, providing the ability to pump the hydrant.
A non-pumped 500’ 4” supply line can flow how many gallons of water per minute?
800
Most ladders in the metropolitan area are platforms and have two guns with the ability to flow how many gallons water per minute when provided an adequate water supply?
2000
Whenever a water supply is established to operate a ladder pipe how many supply lines must be laid between the key pumper at the hydrant and the Forward pumper at the ladder?
2
4 inch hose is limited to how many gallons of water per minute at 500 feet in length before it must be pumped by another engine at the hydrant?
800
Failure to provide two supply lines will limit the ladder to about how many gallons of water per minute depending upon the length of the single line?
1200
5 inch hose can typically supply how many gallons of water per minute A thousand feet away without being pumped?
1000
A single 5 inch hose can deliver how many gallons of water per minute when pumped by key pumper making it unnecessary to lay (2) 5 inch supply lines?
1800-1900 GPM
When operating in the offensive attack mode attack hose lines of adequate volume should be advanced to inside the building never more than how many feet?
150
What are the characteristics and considerations of a solid stream?
Greater penetration, reach and striking power but less steam conversion.
What are the characteristics and considerations of a peripheral stream?
Increased heat absorption/expansion but shorter reach. Most effective in confined spaces and protecting exposures.
When utilizing crews with hand lines to enter basement fires, crews should not open nozzles until what?
They can see and/or are near the fire.
What type of stream should be used when operating in basement fires?
Straight
