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STCW Basic Training Exam #1 Questions With Correct Answers!!
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STCW Basic Training Exam #1 Questions With Correct Answers!!
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STCW Basic Training Exam #1Questions With Correct Answers!!
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
-fire flashes across surface given sufficient oxygen and an external source of ignition
What is a Fire point? - Answer -just above the flash point, liquid gives off flammable
vapors rapidly enough to support continuous combustion
What is ignition temperature? - Answer -substance starts to burn
-heat from external heat source
-auto-ignitio, no external source of ignition needed
What is auto ignition? - Answer vapor generated ignites without any outside ignition
source
, STCW Basic Training Exam #1
Questions With Correct Answers!!
What is vaporization? - Answer rate increases with temperature
What is spontaneous combustion? - 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? - Answer the least concentration of flammable vapors
in air that will burn
What is upper flammable limit - Answer the greatest concentration of flammable
vapors in the air that will burn
What are the results of combustion? - Answer smoke, flame, heat, and gases
_____________ is the result of incomplete combustion - Answer smoke
White or light grey indicates ____________ burning - Answer free
Black or dark grey indicates a ______ fire or a _________ of oxygen - Answer hot,
lack
How is flame produced? - Answer result of conversation of the fuel to a state of
blazing combustion
How is heat generated? - Answer rapid oxidation of the material
How are gases produced? - Answer result of combustion, may or may not be toxic
What are the characteristics of the incipient stage of a fire? - Answer -cool
-good combustion
-little smoke
-good visability
-easy to breath
-radiative feedback
What are the characteristics of the freeborn stage? - Answer -hot
-poor combustion
-dense smoke
-poor visibility
-can't breath
What are examples of a Class A fire? - Answer wood, paper, rubber, plastic
What is a Class A fire? - Answer Common Combustable
What are example of a Class B fire? - Answer Liquids, Greases, Gases, gasoline,
kerosene, oil
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