chp 13,14,15 quiz questions Flashcards
According to tests conducted by UL, in order for ventilation to improve interior conditions, what must occur?
Ventilation must be coordinated with the application of water as close to the fire as possible
How can recirculation be eliminated during smoke ejection?
Completely block the opening around the fan
What is the greatest risk to firefighters performing vertical ventilation?
roof collapse
Where is water directed during hydraulic ventilation?
out a window or door
What is the disadvantage of positive pressure fans?
They can spread fire if used improperly
Which item greatly increases risk during vertical ventilation operations?
Lightweight construction components
Which problem can be caused by using doorways as ventilation openings?
It compromises personnel entry and exit
Which statement about the operation of HVAC equipment during fire ventilation operations is correct?
Some HVAC systems can be used for clearing smoke
Which structural component is composed of relatively small and lightweight components arranged in a series of triangles?
truss
Which type of building is the most prone to the stack effect?
high rise
A dry hydrant provides access to a _____
static water source
An object in motion possesses which kind of energy as a result of that motion?
kinetic
Firefighters may need to hold on to the ____ while filling a self expanding portable tank.
collar
How close must a fire engine get to a static water source to be able to draft directly from it through a hard suction hose?
20 ft
How many gallons per minute can a tanker shuttle operation deliver without interruption?
several hundred
In general, mobile water supply apparatus (tankers) carry _____ of water.
1000 - 3500 gal
Pressure in a water distribution system during average consumption is _____ pressure.
normal operating
What is the maximum capacity of typical portable water tanks?
5000 gal
What is the realistic minimum usable residual pressure from a water distribution system for firefighting operations?
20 psi
When water is motionless, which kind of energy does it have?
potential
The NFPA recommends that a pumper carry a minimum of ____ of supply hose.
800 ft
The two firefighter stiff arm method is used to:
uncouple hose
Which coupling goes on the inside of a straight hose roll?
male
Which device splits one hose stream into two hose streams?
wye
