PPE
What piece of personal protective equipment can be worn to increase visibility at roadway incidents?
Traffic vests
What are the elements necessary to create fire in the model represented by the fire triangle?
Fuel, oxygen and heat
Class D fires involve _________.
Combustible metals
During a structural search, firefighters should monitor radio traffic for________.
changes in orders
This coupling is neither male nor female.
Storz coupling
An open-circuit SCBA air cylinder control valve should be _______ when in use.
opened fully
The potential chemical energy of fuel in fire behavior is converted to ________.
Thermal energy
What alternative energy source will include a shutoff switch on the electric meter?
Solar panels
When is the secondary search performed?
After initial fire suppression is complete
__________ is rubber or plastic hose coated with a plastic wire or helix.
Hard Suction Hose
When donning SCBA, all straps on the harness assembly and facepiece should be ______.
fully extended
The process of ignition causes pyrolysis in solid fuels and _______ in liquid fuels.
Vaporization
What slows the transfer of heat to other combustibles and reduces the chances of overhead gases igniting?
Gas cooling
Having a facepiece dislodged or a low pressure alarm are examples of what type of MAYDAY situation?
Air emergencies
The pressure surge that occurs when water valves or nozzles are opened and closed rapidly is called _______.
water hammer
Where might a firefighter find wear due to friction during a routine personal-protective equipment inspection?
Under arms, crotch, knee and elbow joints
What product of combustion causes the most fire deaths?
Toxic smoke
At fires involving stacked and piled materials, fires streams should be directed at the ________.
extreme edge of the fire
When breaching a wall, a firefighter should always _______ before crawling through the opening.
Sound the floor on the other side
A hose _______ is used to seal small cuts or breaks that may occur in fire hose or to connect mismatched or damaged couplings of the same size to stop leakage.
Jacket
Which types of SCBA air cylinders are tested every five years?
Steel and aluminum
What is defined as the tendency of gases to form into layers according to temperature?
Thermal layering
In its pure form, natural gas is ________.
Methane
What action should a firefighter immediately take after transmitting a MAYDAY report?
Activate PASS device
The main reason a fog stream has greater heat-absorbing capacity than a solid stream is its _______.
Greater surface area coverage