STCW Basic Training Exam Questions with 100%
Correct Answers
What are the conditions needed for a fire to occur?
fuel (material that acts as a fuel)
sources of ignition (chemical, biological, or physical)
oxygen
What are the components of the fire tetrahedron?
heat, fuel, oxygen, chain reaction
How do you stop a fire?
Remove any of the components of the fire tetrahedron (i.e. remove fuel, oxygen, heat, or
interrupt the chemical reaction)
Oxygen
-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
anything that produces the required temperature for ignition
-sun
-open flame
-chemical reaction
, -sparks
-friction
Fuel
-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
-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)?
-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
-fire flashes across surface given sufficient oxygen and an external source of ignition
What is a Fire point?
-just above the flash point, liquid gives off flammable vapors rapidly enough to support
continuous combustion
What is ignition temperature?
Correct Answers
What are the conditions needed for a fire to occur?
fuel (material that acts as a fuel)
sources of ignition (chemical, biological, or physical)
oxygen
What are the components of the fire tetrahedron?
heat, fuel, oxygen, chain reaction
How do you stop a fire?
Remove any of the components of the fire tetrahedron (i.e. remove fuel, oxygen, heat, or
interrupt the chemical reaction)
Oxygen
-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
anything that produces the required temperature for ignition
-sun
-open flame
-chemical reaction
, -sparks
-friction
Fuel
-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
-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)?
-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
-fire flashes across surface given sufficient oxygen and an external source of ignition
What is a Fire point?
-just above the flash point, liquid gives off flammable vapors rapidly enough to support
continuous combustion
What is ignition temperature?
