WK 10 Final Flashcards
When firefighters apply water to the hot gas layer in a compartment, it will:
reduce the radiant heat flux from the upper layer.
What must be done when shutting down a dry-barrel hydrant?
Verify that all of the water drains out
Type V construction buildings may have a veneer of stucco, brick, or stone that:
provides little fire protection
What causes flaming combustion to occur?
A gaseous fuel mixes with an adequate amount of oxygen and heats to ignition temperature.
What factor helps determine the flow path in a structure fire?
The floor plan and openings within the structure
What are the pawls (dogs) of a ladder designed to do?
Hold the fly section in place after it has been extended
A daily/weekly inspection of SCBA should include:
a check of the regulator and facepiece.
What should the attack team do if they open the door to a structure and observe a low neutral plane and turbulent smoke?
Apply water to the hot gas layer, but stay outside the structure
What are attached to hard-suction hose during drafting operations in order to prevent debris from entering the pump?
Intake strainers
Firefighters working on flat roofs are likely to encounter obstacles that penetrate through the roof, including:
skylights
How does a compartment fire affect pressure in and around gases in the compartment?
Heat from a fire increases the pressure of the surrounding gases.
What is often the most readily available fuel source and significantly influences fire development in a compartment fire?
Contents within the structure
What marking or label does NFPA 1931 require to be on all ladders?
Manufacturer’s name plate
Which guidelines should be followed when using SCBA?
Only enter an IDLH atmosphere if you have been certified to wear SCBA and properly fit tested.
Which type of fire attack involves applying water from the outside of the structure in order to reduce the potential for flashover and make the environment more survivable for an interior attack crew?
Transitional attack
Which appliance has one female inlet and multiple male outlets to divide one supply hoseline into two or more hoselines?
Wye appliance
The open web design of truss joints:
permits rapid fire spread in multiple directions.
The transfer of heat through and between solids is known as:
conduction.
When cleaning a ladder, firefighters should:
look for damage or wear and report any defects.
A Fire Fighter I should be able to perform general ladder maintenance, including:
storing ladders so that they are free from moisture and vehicle exhaust.
Which type of hose transports water from the pumping apparatus to the nozzle where it is applied to the fire?
Attack hose
Which is an example of protecting interior exposures?
Closing a door between the fire and unaffected area
Which device would be used if multiple supply lines need to be merged into one hoseline, such as when LDH is not available to overcome friction loss in a long hose lay?
Siamese appliance
What type of truss is constructed of wood or metal and is generally used to support flat roofs and floor assemblies?
Parallel chord truss
Gaseous fuels can be the most dangerous of all fuel types because they:
are already in the physical state required for ignition.
Once an extension ladder is raised and in place, the halyard should be:
secured to prevent someone from becoming tangled in it.
Which type of cleaning can be done at an incident scene by brushing off loose debris and rinsing the PPE?
Routine cleaning
The_____________ on a coupling is a flattened angle at the end of the threads that helps prevent cross-threading when connecting couplings.
higbee cut
A firefighter should not turn off electricity to an entire building until he or she is ordered to, because it:
is necessary to operate essential systems such as elevators and HVAC systems
When advancing hoseline into a building, why is it important to keep doors closed until you are ready to enter the structure?
Helps prevent changes to the flow path
Roof-mounted equipment such as ____________ add a substantial load to the roof and increase the probability of collapse.
HVAC units
Materials that burn at normal oxygen levels will burn more intensely in atmospheres.
oxygen-enriched
When planning to transition directly from a carry to a raise, a ladder should be carried:
butt first
Hazardous materials incidents can involve potentially dangerous nonfire gases and vapors, so firefighters must:
wear SCBA until air monitoring demonstrates that the atmosphere is safe.
How should hard intake hose be cleaned after use?
Rinse with clear water
When turning off the natural gas supply to a structure,
close the valve by turning the tang until it is 90 degrees to the pipe.
What is the minimum number of firefighters required to operate an attack line for interior structural operations?
2
How can revolving doors impact fire fighting operations?
Prevent movement of hose or equipment into the building
Which statement describes a fire in the incipient stage?
The temperature is only slightly above ambient in areas that the fire, plume, and ceiling jet directly affect.
Tying in a ground ladder involves:
using a rope hose tool or safety strap to secure the ladder to a stationary object.
Which SCBA component controls air flow from the cylinder when the regulator fails?
Bypass valve
What action should be taken to protect fire hose in extremely cold temperatures when it is only being used intermittently at a fire?
Allow some water to flow through the nozzle when it is not being used in order to keep it from freezing.
A donut hose roll is advantageous because:
the firefighter controls both couplings.
Which tool or piece of equipment is a member of a fire attack team likely to carry?
hand light
In a Type III construction building, the interior walls, columns, beams, floors, and roofs are completely or partially constructed of:
wood
Fires involve a heat-producing chemical reaction between fuel and:
an oxidizer.
The stage of fire development occurs when the heat release rate of the fire has reached its peak.
fully-developed
A ladder belt is designed to:
secure a firefighter to a ladder while they are working from the ladder.
How can a firefighter help ensure that they will not be affected by limitations caused by equipment that is in poor condition?
Frequent inspections and maintenance
What should the fire department do when a hydrant is taken out-of service?
Place “out-of-service” tags on the hydrant
