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18 Cards in this Set

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  • Back
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What is the definition of size-up?
Evaluation of problems and conditions that affect the outcome of a fire.
page 7
What is the acronym for the traditional 13 point size up?
c- constuction
o- occupancy
a- apparatus and manpower
l- life hazard

w- water supply
a- auxiliary appliances
s- street conditions

w- wheather
e- exposures
a- area and height
l- location and extent of fire
t- time
h- hazmats
page 8
Rule of safety in potential collapse situations, when a building of standard wood joist, wood frame and brick construction within how many minutes after heavy fire exposure is it possible to dangerous to enter?
20 minutes.
page 8
How can we reduce life hazard before a fire occurs?
impose occupancy load restrictions, improve exits, fire partitions and fire doors, install wet pipe sprinkler system.
page 9
What are the two forms of life hazard?
Them and us.
page 9
What percentage of civilian fire deaths occur in residnetial buildings?
80%, 3,000 per year.
page 10
How many more firefighters do we lose in vacant buildings than in residential structures?
4 times as many. 4 per year per 100,000 fires we fight, 18 per year per 100,000 in vacant buildings.
page 10
How does time of day affect life hazard?
Night versus day varies the occupancy load, night has delayed alarms, rush hour traffic.
page 11
How does time of year affect life hazard?
Holidays put people in buildings at unusual times of day and night.
page 11
What is the biggest impact time has?
The elapsed time since the fire began.
page 11
Elapsed burn time is a key indicator of what?
Likelihood of structural collapse.
page 11
What factors play into the possibility of collapse?
Type of construction, fire loading,time of burn before alarm is transmitted, structural alterations( routine or deterioration by wheather, chemical process, or catastrophic event.
page 12
Are fire resistive ratings accurate in regaurd to burn time? Why or why not?
No because they were developed before the increased use of plastics which have an impact on the time-temperature curve which were used to develope the ratings.
page 12
What are the three most common buildings we operate in?
Houses, residential occupancies, and smaller commercial buildings.
page 12
What type of construction is typical in these three?
Wood frame(Class 5), or brick and wood joist(Class 3)
page 12
What rule of thumb do we follow in these two types of structure wood frame(Class 5) and brick and wood joist(Class 3)?
20 minute rule, if the fire is not under control in 20 minutes you should probably start getting your crews out.
page 12
When does this 20 minute time frame start?
When the fire reaches flashover stage and begins to attack the structural elemants.
page 12
How do you gauge how long a fire has been in post-flashover stage?
Fire that has not vented from any windows has geneally been in flashover under 1 to 2 minutes. Fire vented out of one or two windows 1 to 5 minutes. Fire venting from windows on two floors greater than 10 minutes or use of an accelerant, be very cautious.
page 12