DCFD 121.16 Flashcards
How does a member check for roof stability?
Sound with a tool
How would you warn members below that you are about to break a skylight?
Break a small amount of glass, pause, then continue, or use your portable radio
What indications could you use to determine that you are over a main body of fire?
- bubbling tar
- fire showing from a top floor
- dry spots
- melting snow
What is a “Kerf” cut?
small triangular observation hole
Describe a salvage cover
12’ x 18’ heavy duty plastic cover with grommets(24) on the sides and ends
When throwing a coverall what should be done to expel air?
pull down sharply
When forming a catch all what and where are the folds made?
Ends are 24’, the sides are 18’ and the corners folded in but not patted down.
When using two salvage covers to form a floor cover, how is the seam made?
First cover is folded back on itself 8” then the next cover is married on top and then 2 folds or 4” each are made and then patted down( 8-4-4)
When shutting gas off by a curb gate where is it located , and how do you shut if off?
Located between and the curb and the property line, turn clockwise until it resists usually 6 to 20 turns depending on the size of the valve.
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 a counter clockwise direction
Can gas meters be turned off? If so, explain the process.
Turn stopcock so that the operating lug is crosswise to the pipe a 1/4 turn.
What is the term for the chemical damage that occurs to wood when it is heated?
Pyrolysis
Fire-retardant wood is treated with______.
Mineral salts.
What is the term for plastics that will melt under fire conditions?
Thermoplastics
What is commonly used structural material in a Type I building?
Protected Steel
Which type of construction is called ordinary construction?
Type 3
The structural components of a Type____ building will not burn.
Type 2
Which type of construction is heavy timber?
Type 4
What is type 5 construction?
Wood frame
Which structural component is composed of relatively small and lightweight components arranged in a series of triangles?
Truss
What are smoke, heat, and toxic gases called collectively?
products of combustion
What is the term for an open space within a wall where wires and pipes run?
Chase
Within a room or space, where are the hottest gases found?
At the highest level
What is the term for the transfer of heat through a circulating medium of liquid or gas?
Convection
Which sort of air movement is likely on a hot day in an air-conditioned tall building?
Downdraft
In ordinary construction, exterior walls are made of_____.
Noncombustible or limited-combustible materials
In which construction type are there uninterrupted channels in the walls from foundation to attic?
Balloon Frame
Which hazard is of particular concern in a basement fire?
Smoke and heat venting up the stairs toward fire fighters
What is the maximum wattage that an apparatus-mounted generator can produce?
Between 10,000 and 15,000 watts
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?
salvage
What is the term for operations undertaken to find and extinguish any remaining pockets of fire?
overhaul
The lighting and power equipment used on an emergency scene generally operate at_______
110-volt AC
Which device interrupts the current when there is a problem with an electrical ground?
GFI
It is permissible to remove SCBA during salvage operations after______.
Atmosphere has been tested and found safe
The first portable light should be set up_____.
At the entry point into the structure
