apprentice test 2
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What does the triangle-shaped handle on a cylinder indicate?
overfill protection device (OPD)
oil-based liquids including gasoline, kerosene, diesel
distilled products. mix well with water (alcohol, acetone...)
what can be used to put out class B fires?
Co2, dry chem, and water (if fuel has high flash point)
how do you extinguish 3-dimensional fire?
dry chem first to put out fire then foam to cool and secure situation
T/F Foam is not effective on products that are above their boiling point at normal temps and pressures
T/F Foam is effective on Class D fires
F if chemical ends in -ide of -ium, water is not your chum
Type of foam used for subsurface injection at bulk tank fires
Effective foam on hydrocarbons
Foam proportioning can take place through:
- batch mixing
what is the max length of hose (generally) permitted after the eductor?
what is the max length of the eductor pick up tube?
what are the 3 foam application techniques?
- bank down
- roll on
what is the NFPA 11 recommendation for application rate of foam?
.10 gpm/sq. foot
Min GPM for residential fires-
What is the working line?
the first 50' of hose at the door
Whose job is it to clear the bed of hose?
The well hole stretch will use 1 length of hose for how many stories of a stairwell?
Siamese connection to a standpipe is known as what?
FDC (Fire dept. connection)
What are the 4 methods of interior attack?
- Modified Direct
Where do you open up a structure to check for extension in overhaul?
interior walls and ceiling (sometimes floor)
How does foam work to extinguish a fire?
cooling and smothering
According to policy, where should Rx begin?
- known location (obvious rx)
- most threatened (fire floor)
- largest group
- remainder of bldg
What constitutes a high rise according to policy?
type of material known as "solid gasoline"
flow at which an engine company wins the battle
critical flow rate
Water absorbs additional 970 BTUs when it turns to steam at 212 degrees. This is known as what?
latent head of vaporization
How much does water expand when it turns to steam?
Nozzle reaction is a function of what 2 factors?
flow rate and nozzle pressure
What is the optimal level for nozzle reaction
what is the practical flow limit for 1.75" hose?
What are the 3 types of spray?
____is AKA the constant pressure nozzle
Nozzle types in order of complexity
- smooth bore
- constant gallonage
- adjustable gallonage
- automatic (constant pressure)
ADULTS stands for what?
- Advanced fire on arrival
- Defensive Operations
- Unable to determine extent
- Large, uncompartmented areas
- Tons of water needed
- Standpipe operations
How much does water expand at 1,000 degrees?
Rapidly moving smoke is the result of what?
higher heat=higher pressure
Portable monitors that are always used on the ground are called what?
Bresnan distributors are primarily used where?
Rate of rise detectors are almost always linear or spot?
Ionization detectors are always spot or linear?
light obscuration detectors are spot or linear?
sprinkler type where heads are always open. All heads flow at the same time
uses elements of deluge and dry pipe systems.
Minimizes water damage
Relies on another detection system
Pressure regulating valves are required on systems pressurized at what psi?
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