MP 202.12E Water Supply and Fire Stream Management Flashcards
What should every first due company approaching a scene with evidence of a working fire do?
Lay their own supply line
What are the 3 exceptions to laying your own supply line when approaching a scene with evidence of a working fire?
- Obvious critical rescue requiring a full crew
- Unsure of actual fire location in multi-unit building complex
- Hydrant within fifty feet of the fire (handjack)
When should a second line be considered?
on any working incident
Where should a line be laid?
on the same side of the roadway as the hydrant is and cross over at the fire if necessary
Why is it important to lay a line slowly?
Faster speeds result in more hose on the roadway
What are some advantages that slower speeds provide in regards to laying a line? (3)
- Reduces the risk of striking pedestrians or vehicles or firefighters
- Provides time for the Company Officer to size-up and evaluate critical fireground factors
- Provides time for the Engineer to appropriately spot the apparatus
How does staging key pumpers on hydrants enhance fireground safety? (3)
- Ensures an uninterrupted water supply
- Provides volume when needed
- Ability to pump water through the forward pumper in the event of mechanical failure
On First Alarm Assignments, what should be done before pumped water is considered?
companies should lay their own supply line to cover all critical tactical positions
Typically, when is pumped water needed?
late in the first alarm assignment or as the second alarm companies arrive
What must be taken into account when establishing supply lines for master stream operations? (3)
- diameter
- length of line
- the anticipated volume of water for the fire
Whenever a water supply is established to operate a ladder pipe, what MUST be done between the key pump at the hydrant and the forward pump at the ladder?
two supply lines MUST be laid between them
What is the main objective of the attack hose line choice?
is to provide enough GPM flow to overcome the volume of fire being produced, or an adequate flow to effectively cool and protect exposures
When operating in the offensive attack mode, where should the first stream be placed?
Between the fire and persons endangered by it
When no life is endangered, where should the first stream be placed when operating in offensive attack mode?
Between the fire and the most severe exposure or unburned area
Where should the second hose line be placed when operating in the offensive attack mode?
deployed to protect secondary means of egress
Where should additional hose line be placed when operating in the offensive attack mode?
to cover other critical areas or when covered, to back up in place hose lines
Hose lines should be placed in a madder and direction that does what? (4)
- supports rescue activities
- begins confinement
- protects exposures
- controls loss
When changing from offensive to defensive, what should be done with hand lines if safe to do so?
pull hand lines out of the fire building
What are benefits to Solid Stream?
- Greater penetration, reach, and striking power
- Less steam conversion
What are the benefits to Peripheral Stream?
- Increased heat absorption/expansion
- Shorter reach
- Most effective in confined spaces and protecting exposures
What kind of stream should not be used for basement fires and why?
Fog Streams because steam production will be extensive
When should Exterior Master Streams NOT be utilized?
with interior operations in the same structure
After Master Stream use, what must be done BEFORE committing crews to interior positions?
Master streams must be shut down and Command and the Sector Officers must evaluate the structures stability in these situations.
