Fire Dynamics
Which is near simultaneous ignition from all combustibles in a compartment?
What is flashover pg 154
A typical rough measurement from the floor to the windowsill of a commercial building is?
4 ft
pg327
Which action is the first priority for the firefighter during a VEIS operation?
Locate and close the door
A crew directs a stream at the ceiling level to cool the gas layer, and at burning material at floor level. This is a(n)______attack.
Combination
Which form of ventilation uses a fan to pull smoke from the interior and blow it outside?
Negative-Pressure
A reaction that absorbs energy?
Endothermic pg120
Extension Ladders 35 feet or longer should be raised by a minimum of people?
3
pg337
What does the A in the LUNARS acronym stand for?
Assignment and air supply
Unprotected steel structural members elongate when exposed to temps. as low as____.
1000 F(540 C)
pg684
Which ventilation opening is used to create a defensible position ahead of a spreading fire?
Trench
Which is the best indicator of potential backdraft?
Pulsing, puffing discharges of smoke?
What is a good choice for ladder placement on a building?
At a buildings corner
pg 333
Where should a primary search begin?
As close to the fire as possible
What is the purpose of lockout/tagout devices?
Prevent unauthorized activation of machinery or electrical equipment. pg 719
Which type of ventilation relies primarily on atmospheric conditions?
Natural horizontal
On a Celsius scale, at what temperature does water begin to boil?
100
How should a ladder be positioned through a WIDE window?
Resting on the windowsill with two to three rungs above the windowsill.
pg 333
The room temp. limit for victim survivability is about ______?
162 F (72 C)
Which is a common source of injuries when fighting vehicle fires?
Exploding pneumatic struts pg 695
Why is it important to coordinate with suppression crews before ventilation?
Ventilation will result in increased fire intensity
Which is the primary Class A fuel characteristic determining how it readily ignites.
What is surface to mass ratio?
Which determines the number of required heat sensor labels?
Number of beams
pg 316,321
Which is the term for a visit made to a location to become familiar with it before an incident occurs?
Preincident survey
The flames of which alternative vehicle fuel are invisible in daylight>
Hydrogen pg704
When smoke temp. in a building equalizes and forms layers, it is said to____/
Stratify pg 525