STCW Basic Training Exam #1
Questions and Answers 100% Solved
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
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, -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
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
Questions and Answers 100% Solved
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
1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
, -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
2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.
