Max size of cuts in tires
None over 1”
class C fire
Minimum front tread
spontaneous ignition when exposed to air
Disadvantage of synthetic class b foam
Limited post-fire security
level D protective clothing
coverall with no respiratory protection
whats a class B fire
flammables (liquids, gases)
Normal transmission temp?
Below 250 degrees
Minimum rear tire tread
class D fires
Accident prevention (smith safe driving system) A B K L M
Aim high Big picture Keep eyes moving Leave an out Make sure you're seen
why would we tandem pump
its used when pressures higher than the capability of a single pump are required
In a 20” wheel, what is the maximum allowable free play?
2” in each direction
Normal water temp
Normal oil pressure
short relay operation in which a source pumper pumps into the intake of the second pumper; the second pumper boots the pressure of the water even higher (dupont @ coleman fire)
whats LC 50
lethal concentration 50; expected to cause death upon inhalation 50% of the time
How long should weeklies be
flow of blue hydrant
1500GPM or more
What do batteries in series do?
Increase your voltage, but amps stay the same
whats a class C fire
flow of red hydrant
below 500 GPM
How much foam can we get out of 1 class b bucket
1- 5 gallon bucket will mix with 500 gallon
whats a class A fire
wood , paper, cloth
at 100% capacity, what can our type I engine pump
1500 GPM @ 150PSI
What does having batteries in parallel do?
Keeps voltage the same, increases amps
How long should a daily be?
How much can an engine cover with one bucket of b foam
300 sq ft
17x17 or 20’ circle
what’s considered a “large” hazmat spill
greater than 55 gallons
How far should mud flaps be?
2/3 down from the top
flow of orange hydrant
Elements of total stopping distance (4)
- Perception time (3/4 sec)
- Decision/reaction time (3/4 second)
- Air brake lag (1/4- 1 second)
- Braking distance (150’-200’)
at 50% capacity, what can our type I engine pump
750 GPM @ 250psi
When should the daily be done?
class K fire
What does SBC carry for class b
Air tank pressure
what should you do when a substance spills at night regarding isolation distance (consider valleys and inversions during daytime too)
isolation distances are doubled
flow of green hydrant
What’s pump pressure at idle?
AFFF is used primarily for
Spreading over surface of hydrocarbon based liquids
Where do we check brake fluids on engines?
We don’t! We have air brakes!
level C protective clothing
respirator plus splash suit
Collapse zones for a building
1 1/2x the height of the building
at 200psi, what can our type I pump
level A protective clothing
encapsalting chem suit
level B protective clothing
scba plus hooded chem suit (splash suit)
sequence of chain reactions that produce heat and pressure
At what angle do you spot an engine when blocking
45 degree angle