STCW Basic Training Exam #1
What is a Fire point? - CORRECT ANSWER--just above the flash point, liquid gives off
flammable vapors rapidly enough to support continuous combustion
What is ignition temperature? - CORRECT ANSWER--substance starts to burn
-heat from external heat source
-auto-ignitio, no external source of ignition needed
What is auto ignition? - CORRECT ANSWER-vapor generated ignites without any
outside ignition source
What is vaporization? - CORRECT ANSWER-rate increases with temperature
What is spontaneous combustion? - CORRECT ANSWER-heat is generated by a
chemical action within a substance and this continues until you have ignition (usually
begins with oxidation and combines oxygen and gives off energy in the form of heat)
What is lower flammable limit? - CORRECT ANSWER-the least concentration of
flammable vapors in air that will burn
What are the conditions needed for a fire to occur? - CORRECT ANSWER-fuel
(material that acts as a fuel)
sources of ignition (chemical, biological, or physical)
oxygen
What are the components of the fire tetrahedron? - CORRECT ANSWER-heat, fuel,
oxygen, chain reaction
How do you stop a fire? - CORRECT ANSWER-Remove any of the components of the
fire tetrahedron (i.e. remove fuel, oxygen, heat, or interrupt the chemical reaction)
Oxygen - CORRECT 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
What is a flash point (of a liquid)? - CORRECT 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
-fire flashes across surface given sufficient oxygen and an external source of ignition
, What is upper flammable limit - CORRECT ANSWER-the greatest concentration of
flammable vapors in the air that will burn
What are the results of combustion? - CORRECT ANSWER-smoke, flame, heat, and
gases
_____________ is the result of incomplete combustion - CORRECT ANSWER-smoke
White or light grey indicates ____________ burning - CORRECT ANSWER-free
Black or dark grey indicates a ______ fire or a _________ of oxygen - CORRECT
ANSWER-hot, lack
How is flame produced? - CORRECT ANSWER-result of conversation of the fuel to a
state of blazing combustion
How is heat generated? - CORRECT ANSWER-rapid oxidation of the material
How are gases produced? - CORRECT ANSWER-result of combustion, may or may not
be toxic
Heat - CORRECT ANSWER-anything that produces the required temperature for
ignition
-sun
-open flame
-chemical reaction
-sparks
-friction
Fuel - CORRECT 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 - CORRECT 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 are the characteristics of the incipient stage of a fire? - CORRECT ANSWER--
cool
-good combustion
-little smoke
-good visability
-easy to breath
What is a Fire point? - CORRECT ANSWER--just above the flash point, liquid gives off
flammable vapors rapidly enough to support continuous combustion
What is ignition temperature? - CORRECT ANSWER--substance starts to burn
-heat from external heat source
-auto-ignitio, no external source of ignition needed
What is auto ignition? - CORRECT ANSWER-vapor generated ignites without any
outside ignition source
What is vaporization? - CORRECT ANSWER-rate increases with temperature
What is spontaneous combustion? - CORRECT ANSWER-heat is generated by a
chemical action within a substance and this continues until you have ignition (usually
begins with oxidation and combines oxygen and gives off energy in the form of heat)
What is lower flammable limit? - CORRECT ANSWER-the least concentration of
flammable vapors in air that will burn
What are the conditions needed for a fire to occur? - CORRECT ANSWER-fuel
(material that acts as a fuel)
sources of ignition (chemical, biological, or physical)
oxygen
What are the components of the fire tetrahedron? - CORRECT ANSWER-heat, fuel,
oxygen, chain reaction
How do you stop a fire? - CORRECT ANSWER-Remove any of the components of the
fire tetrahedron (i.e. remove fuel, oxygen, heat, or interrupt the chemical reaction)
Oxygen - CORRECT 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
What is a flash point (of a liquid)? - CORRECT 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
-fire flashes across surface given sufficient oxygen and an external source of ignition
, What is upper flammable limit - CORRECT ANSWER-the greatest concentration of
flammable vapors in the air that will burn
What are the results of combustion? - CORRECT ANSWER-smoke, flame, heat, and
gases
_____________ is the result of incomplete combustion - CORRECT ANSWER-smoke
White or light grey indicates ____________ burning - CORRECT ANSWER-free
Black or dark grey indicates a ______ fire or a _________ of oxygen - CORRECT
ANSWER-hot, lack
How is flame produced? - CORRECT ANSWER-result of conversation of the fuel to a
state of blazing combustion
How is heat generated? - CORRECT ANSWER-rapid oxidation of the material
How are gases produced? - CORRECT ANSWER-result of combustion, may or may not
be toxic
Heat - CORRECT ANSWER-anything that produces the required temperature for
ignition
-sun
-open flame
-chemical reaction
-sparks
-friction
Fuel - CORRECT 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 - CORRECT 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 are the characteristics of the incipient stage of a fire? - CORRECT ANSWER--
cool
-good combustion
-little smoke
-good visability
-easy to breath
