IFSTA CHAPTER 14 FIRE STREAMS Flashcards
How many times does water expand when converted to steam?
1700 times
What three sizes are fire streams classified into?
Low-volume, handline and master streams
What size hose and GPM classify a handline?
1 ½” - 3” hose and 40 – 350 GPM
What are the three types of fire streams?
Solid, fog and broken
Which type of nozzle allows the operator to vary the GPM while maintaining a constant nozzle pressure?
Automatic Nozzle
What is another name for a fog Nozzle?
Combination nozzle
What is the designed operating pressure for most combination nozzles?
100 psi
What class of fire is a broken stream nozzle least effective?
Class C electrical
Where is the most effective place to use a broken stream nozzle?
Confined space
What is the most common type of nozzle control valve?
Ball valve
What 4 ways can firefighting Foam aide in firefighting?
Separating, cooling, smothering, penetrating (class A)
What is the ratio of expansion commonly accepted for medium-expansion foam?
20:1 – 200:1
How thick should the foam blanket be on unignited class B spills?
4”
What percent water is most firefighting foams intended to be mixed?
94% - 99.9% water
Which is the easiest method of foam proportioning?
Batch mixing
Which type of foam proportioning is commonly used with portable and wheeled fire extinguishers.?
Premixing
Which is the most common type of foam proportioner?
In-line foam educator
What type of nozzle is most effective at creating low expansion foam?
Air-aspirating foam nozzle
What type of nozzle can be use to create a short lasting low expansion foam when used with AFFF and class a foams?
Fog Nozzle
What type of nozzle is typically used to deliver medium-expansion firefighting foam?
Water-aspirating nozzle
What type of foam is a mechanical blower used produce?
High-expansion foam
