Questions with All Correct
Answers
What is the immediate action you take when you discover a fire? - Answer--sound the
alarm
-report location (of fire and what is burning)
-warn or rescue endangered crew members
-restrict the spread of fire by closing ports, hatches, and shutting down ventilation
ONLY attempt to extinguish if:
-fire is small and in incipient stage
-extinguished is proper size and type
-escape route is clear
-smoke and toxic gas buildup is minimal
you are confident that the fire can safely be put out
What is the Fire and Emergency Signal? - Answer-A continuous sounding of the ship's
whistle and general alarm for a period of no less than 10 seconds
What are four human causes of fires? - Answer--careless action
-irresponsible actions
-ill-advised actions
-ommissions
What are the #1 causes of the start of fires? - Answer--careless smoking habits
(disposal, smoking in bed, disregard for restricted areas)
-poor housekeeping (dirty/oily machinery, cloths drier lint accumulation, improper, non-
secured storage)
What are causes of electrical circuit fires? - Answer--worn insulation
-overloading
-poor wiring
-wrong sized fuses
-wrong equipment for circuits
-substandard equipment and parts
-jury rigging
-exposed circuits
-water drips
-improper maintenance
, What are some causes of galley fires? - Answer--open flames
-hot surfaces
-hot oil
-much activity
-rubbish
-grease
-energy sources
What are the conditions needed for a fire to occur? - Answer-fuel (material that acts as
a fuel)
sources of ignition (chemical, biological, or physical)
oxygen
What are the components of the fire tetrahedron? - Answer-heat, fuel, oxygen, chain
reaction
How do you stop a fire? - Answer-Remove any of the components of the fire
tetrahedron (i.e. remove fuel, oxygen, heat, or interrupt the chemical reaction)
Oxygen - Answer--21% ambient air
-robust flaming combustion down to 15-16%
-surface combustion (smoldering) down to about 11%
-loss of consciousness in atmospheres with 12% or less oxygen
Heat - Answer-anything that produces the required temperature for ignition
-sun
-open flame
-chemical reaction
-sparks
-friction
Fuel - Answer--only vapors burn
-liquids and solids must first be vaporized
-tendency of a substance to vaporize is an indication of its ability to burn
-liquids vaporize more readily than solids
Chain reaction - Answer--you can have oxygen, heat, and fuel in the same place and
still not have a fire
-fuel and oxygen relationship must be balanced (i.e. in the flammable range)
-heat must be sufficient to bring fuel to its ignition
What is a flash point (of a liquid)? - Answer--the lower temp that a liquid can give off
sufficient gas to form a flammable gas mixture near the surface of a liquid
-lowest temp at which we can have fire