[Shipboard Firefighting] Flashcards
What is the fire tetrahedron required for sustained combustion?
Fuel, oxygen, heat, and chain reaction
What is the fire triangle required for combustion?
Fuel, oxygen, and heat
Hydrogen fluoride (HF) is very toxic to humans. Concentrations above ___ parts per million (PPM) can be harmful and/or fatal.
3 PPM
How do you check a bulkhead or door for heat?
With the back of your hand
The lowest temperature at which a liquid gives off sufficient vapor to form an ignitable flame
Flashpoint
Heat that radiates back to the fuel
Radiation feedback
The transfer of heat through a solid body
Conduction
The lowest temperature at which sustained combustion will occur without the application of a spark or flame
Ignition temperature/ignition point
What are the four specific actions of agents?
1) Cooling
2) Smothering
3) Oxygen dilution
4) Chain breaking
What are the abundant byproducts of incomplete and complete combustion, respectively?
Carbon monoxide (CO) and carbon dioxide (CO2)
What is the purpose of ventilation?
To remove smoke and toxic gases
How long is the time delay for the FM 200 and the CO2 system?
60 seconds
How will FM 200 control cabinets or spaces containing valves or manifolds be conspicuously identified?
Red letters at least 2 inches high
What are the four positions of a firefighting team?
1) Nozzle man
2) Backup man
3) Hose team member
4) Plug man/hose team member
Chemical process in which a substance combines with oxygen
Oxidation
Fifth class of fire
Class K
Kitchen appliances that involve combustible liquids
Extinguisher: Wet chemical
How much pressure is in an SCBA cylinder?
4500 PSI
Third class of fire
Class C
Energized electrical fire
Extinguisher: Secure power/CO2
Second class of fire
Class B
Flammable liquids
Extinguisher: foam (AFFF)
What should a crew member do upon discovering a fire?
Sound the alarm (continuous blast of ship’s whistle for not less than 10 seconds supplemented by the continuous ringing of the general alarm bells for not less than 10 seconds)
What is the rapid oxidation of millions of vapor molecules?
Combustion
What are the five stages of fire?
1) Ignition
2) Growth
3) Flashover
4) Fully-developed fire
5) Decay
At what temperature will the FM 200 chemically break down?
At 1300 degrees, it turns into hydrogen fluoride
Three types of alarms on Army watercraft
Audible, visual, and time delay
What is the investigator’s role in a fire emergency?
Be the eyes and ears for the OSL
The use of strategy, personnel, equipment, and systems to extinguish fires
Firefighting
Fourth class of fire
Class D
Combustible metals
Extinguisher: Dry powder
DO NOT USE WATER
DO NOT CONFUSE DRY POWDER WITH DRY CHEMICAL
The transfer of heat across an intervening space
Radiation
First class of fire
Class A
Ash-producing
Extinguisher: water
When should fire hoses be inspected?
During weekly fire drills
Which extinguishing agent should NOT be used on Class K fires?
Water
The transfer of heat through the motion of circulating gases or liquids
Convection
What are the two types of attacks?
1) Direct - straight stream method
2) Indirect - fog stream method
What type of heat moves in all directions?
Radiant heat
