STCW Firefighting Latest Exams and
Solutions
number one cause of fire - Answer - ✔✔-careless smoking habits (disposal, smoking in
bed, disregard for restricted area)
-poor housekeeping(dirty/oily machinery, clothes drier lint)
heat, oxygen, and fuel - Answer - ✔✔_______,________, and___________ are sides of
the fire triangle
fire triangle - Answer - ✔✔heat, oxygen, and fuel are sides of the___________
removal of any 1 component - Answer - ✔✔will cause the fire to be extinguished
the fire tetrahedron - Answer - ✔✔____________________, or all components are
necessary for a fire to occur
tetrahedron - Answer - ✔✔the fire triangle
required temperature - Answer - ✔✔anything that produces the __________
_____________ for ignition will satisfy this leg of the triangle
- sun, open flame, chemical reaction, sparks, friction, static electricity, biological
processes
21% oxygen - Answer - ✔✔earths atmosphere
vapors - Answer - ✔✔only ________ burn
liquids and solids - Answer - ✔✔are too dense/must be vaporized 1st
burn - Answer - ✔✔the tendency of a substance to vaporize is an indication of its ability
to ______
solids - Answer - ✔✔-liquids vaporize more readily than __________
gases - Answer - ✔✔_________ are already in a vapor state
oxygen-heat-fuel - Answer - ✔✔you can have ________-________-___________ in the
same place and still not have a fire
fuel-oxygen - Answer - ✔✔_______-________ relationship must be balanced, i.e., must
be in the flammable range
, ignition temperature - Answer - ✔✔heat must be sufficient to bring fuel to its
-remove fuel, or
-remove heat, or
-remove oxygen, or
-interrupt chemical reaction, or
-do any combination above - Answer - ✔✔To stop a fire
Class A - Answer - ✔✔combustile solids (trashcan, paper,wood)
Class B - Answer - ✔✔combustile; flammable liquids
Class C - Answer - ✔✔energized electrical equipment (wiring)
Class D - Answer - ✔✔combustile metals (Aluminum, Magnesium)
Class K - Answer - ✔✔cooking material (cooking oils)
flash point of a liquid - Answer - ✔✔-the lowest temp. at which a liquid gives off
sufficient vapor to form an ignitable mixture at the surface of the liquid
-fire flashes across the surface given sufficient oxygen and external source of ignition
-lowest temp. at which we can have a fire
-indicator of the severity of a fire hazard
fire point - Answer - ✔✔just above the flash point- liquid vaporizes rapidly enough to
sustain continuous combustion
ignition temperature - Answer - ✔✔lowest temp. of a combustible substance at which
sustained combustion will occur without spark or flame
spontaneous combustion - Answer - ✔✔heat is generated by a chemical action within a
substance and this continues until you have ignition
-begins with oxidation and combines with oxygen and gives off energy in the form of
heat
lower flammable limit - Answer - ✔✔the least concentration of flammable vapors in the
air that will burn (lean limit)
upper flammable limit - Answer - ✔✔the greatest concentration of flammable vapors in
air that will burn(rich limit)
smoke, flame, heat, and gases - Answer - ✔✔results of combustion
Solutions
number one cause of fire - Answer - ✔✔-careless smoking habits (disposal, smoking in
bed, disregard for restricted area)
-poor housekeeping(dirty/oily machinery, clothes drier lint)
heat, oxygen, and fuel - Answer - ✔✔_______,________, and___________ are sides of
the fire triangle
fire triangle - Answer - ✔✔heat, oxygen, and fuel are sides of the___________
removal of any 1 component - Answer - ✔✔will cause the fire to be extinguished
the fire tetrahedron - Answer - ✔✔____________________, or all components are
necessary for a fire to occur
tetrahedron - Answer - ✔✔the fire triangle
required temperature - Answer - ✔✔anything that produces the __________
_____________ for ignition will satisfy this leg of the triangle
- sun, open flame, chemical reaction, sparks, friction, static electricity, biological
processes
21% oxygen - Answer - ✔✔earths atmosphere
vapors - Answer - ✔✔only ________ burn
liquids and solids - Answer - ✔✔are too dense/must be vaporized 1st
burn - Answer - ✔✔the tendency of a substance to vaporize is an indication of its ability
to ______
solids - Answer - ✔✔-liquids vaporize more readily than __________
gases - Answer - ✔✔_________ are already in a vapor state
oxygen-heat-fuel - Answer - ✔✔you can have ________-________-___________ in the
same place and still not have a fire
fuel-oxygen - Answer - ✔✔_______-________ relationship must be balanced, i.e., must
be in the flammable range
, ignition temperature - Answer - ✔✔heat must be sufficient to bring fuel to its
-remove fuel, or
-remove heat, or
-remove oxygen, or
-interrupt chemical reaction, or
-do any combination above - Answer - ✔✔To stop a fire
Class A - Answer - ✔✔combustile solids (trashcan, paper,wood)
Class B - Answer - ✔✔combustile; flammable liquids
Class C - Answer - ✔✔energized electrical equipment (wiring)
Class D - Answer - ✔✔combustile metals (Aluminum, Magnesium)
Class K - Answer - ✔✔cooking material (cooking oils)
flash point of a liquid - Answer - ✔✔-the lowest temp. at which a liquid gives off
sufficient vapor to form an ignitable mixture at the surface of the liquid
-fire flashes across the surface given sufficient oxygen and external source of ignition
-lowest temp. at which we can have a fire
-indicator of the severity of a fire hazard
fire point - Answer - ✔✔just above the flash point- liquid vaporizes rapidly enough to
sustain continuous combustion
ignition temperature - Answer - ✔✔lowest temp. of a combustible substance at which
sustained combustion will occur without spark or flame
spontaneous combustion - Answer - ✔✔heat is generated by a chemical action within a
substance and this continues until you have ignition
-begins with oxidation and combines with oxygen and gives off energy in the form of
heat
lower flammable limit - Answer - ✔✔the least concentration of flammable vapors in the
air that will burn (lean limit)
upper flammable limit - Answer - ✔✔the greatest concentration of flammable vapors in
air that will burn(rich limit)
smoke, flame, heat, and gases - Answer - ✔✔results of combustion
