121.16 Flashcards
How does a member check for roof stability?
Sound with a tool.
How would you warn members below you are about to break a skylight?
Break small amount of glass pause then continue or use portable radio.
What indicators could you use to determine that you are over main body of fire?
1) Bubbling tar
2) fire showing
3) dry spots
4) melting snow
What is a kerf cut?
Small triangular observation hole
Describe a salvage cover
12’ x 18’ heavy duty plastic cover with 25 grommets on sides and ends
When throwing a coverall what should be done to expel air?
Pull down sharply
When using two salvage covers to form a floor cover how is seam made?
First cover folded back on self 8” then next cover is married on top then 2 folds of 4” each are made and then patted down
When forming catch all what and where are the folds made?
Ends are 24” the sides are 18” and the corners are folded in but not patted down.
When shutting gas off at curb valve where is it located and how do you shut it off?
Between curb and property line. Turn clockwise until it resists usually 6-20 turns depending on size.
If a fire valve cannot be opened at first what may you do to assist yourself in gaining access?
Tap around the edge while applying pressure in counter clockwise direction.
Can gas meter be turned off, If so explain?
Yes. Turn stopcock so the operating lug is crosswise to the pipe 1/4 turn.
What is the term for the liberation of gaseous fuel vapors that are emitted when wood is heated?
Pyrolysis
What is fire retardant wood treated with? What is its advantage under fire conditions?
Mineral Salts. More difficult to ignite and slows rate of burning.
What is the term for plastics that melt under fire conditions and at what temperature does this process begin?
Thermoplastic materials. 500F
What is commonly used structural material in a Type 1 building?
Protected steel
Which type of construction is called ordinary construction and why?
Type 3 because it is used in a wide variety of buildings.
The structural components of a ____ building will not burn. Define and give examples of this type of building’s structural components.
Type 1. Construction components are made of non combustible material such as steel, concrete, or gypsum board.
Which type of construction features heavy timber and describe it in further detail?
Type 4. Exterior walls are masonry. Interior walls, columns, beams, floors and roof structure are made of wood.
What is type 5 construction?
Wood frame. All major components are wood.
Which structural component is composed of relatively small and lightweight components arranged in a series of triangles and what is its most common application?
Truss. Roof structures.
What is the definition of smoke inversion?
Smoke hangs low to ground due to cool air.
What is the term for an open space within a wall where wires and pipes run? How is it relevant to firefighting operations?
Chase. Can act as an Avenue for fire spread.
Within a room or space, where are the hottest gases found and how high can temperatures reach there?
Highest level. 2200F
What is the term for the transfer of heat through a circulating medium or liquid or gas?
Convection
Which sort of air movement is more likely likely in a tall building in a day with extreme temps?
Downdraft
In ordinary construction, exterior walls are made of _____?
Non combustible or limited combustible materials
In which construction type are there uninterrupted channels in the walls from foundation to attic?
Balloon frame
Which hazards are of particular concern when extinguishing a basement fire?
Smoke and heat venting up the stairs
What device prevents firefighters from receiving a potentially fatal electric shock?
GFI’s
The output range for portable lights is generally _____ watts?
300 to 1500 watts
What is the term for operations undertaken to limit or reduce property loss following a dire, and what are the primary elements to protect from?
Salvage. Smoke and water.
What is the term for operations undertaken to find and extinguish any remaining pockets of fire and what are its methods?
Overhaul. Opening up or hydraulic overhaul.
The lighting and power equipment used on an emergency scene generally operate at ___?
110 volt AC
Where should a rooms furniture be placed to best protect it for salvage and what Simon firefighter equipment should be used?
Center. Salvage tarp.
It is permissible to remove SCBA during salvage operations after ____.
Atmosphere has been tested and found to be safe.
The first portable light should be set up____.
At the entry point into structure.
