CFI Exam Quizzes with Correct Answers
A = V/ohm - ✔✔Resistance & voltage can be measured - the amperage can be
calculated
Gas flash point - ✔✔49 - 40
Exothermic - ✔✔Reaction that results in the release of energy in the form of heat
Conditions needed to start a fire - ✔✔Less then 70% humidity + 80 degrees hot to
Relative humidity must be ------ to ignite from smoking materials - ✔✔25%
Cause - ✔✔The circumstances, conditions that bring together a fuel ignition source &
oxidized resulting in a fire of explosion
Radiant flux - ✔✔Blistering from overhead hot gas layer
Fire tetrahedron - ✔✔Is the Chemistry of combustible fuels oxidizing agent, heat
inhibited chemical chain reaction
Kilowatts
BTU/sec - ✔✔Heat is commonly defined in terms of intensity or heating rate &
measured in 2 ways
Stoichiometrio Ratio - ✔✔The amount of air in balance with amount of fuel
Rarely happens - except in certain types of gas fires
, Current is measured in ? - ✔✔Amps
< or = 20% COHB - ✔✔Most likely died from other causes, lack of O2 Burns -
> or = 40% COHB - ✔✔Carbon monoxide alone
Pyrolysis - ✔✔Chemical change in matter caused by heat / burning
Resistance is measures in - ✔✔OHMs
Thermal conductivity of easily ignitable fuels like wood, plastic foam, or paper - ✔✔Is
very low
Flammable gas - ✔✔Can only be ignited by a spark or pilot flame over specific range
of gas concentrations expressed in LEL & UEL
Three forms of ignition that occur with solid fuels - ✔✔Smoldering ignition (initial of
solid phase burning)
Piloted flaming ignition
Flaming auto ignition
Thermal runaway - ✔✔Is an instability that occurs when heat generation exceeds
heat loss within the material. It is a contest between Exothermic chemistry and heat loss
to the surroundings
A = V/ohm - ✔✔Resistance & voltage can be measured - the amperage can be
calculated
Gas flash point - ✔✔49 - 40
Exothermic - ✔✔Reaction that results in the release of energy in the form of heat
Conditions needed to start a fire - ✔✔Less then 70% humidity + 80 degrees hot to
Relative humidity must be ------ to ignite from smoking materials - ✔✔25%
Cause - ✔✔The circumstances, conditions that bring together a fuel ignition source &
oxidized resulting in a fire of explosion
Radiant flux - ✔✔Blistering from overhead hot gas layer
Fire tetrahedron - ✔✔Is the Chemistry of combustible fuels oxidizing agent, heat
inhibited chemical chain reaction
Kilowatts
BTU/sec - ✔✔Heat is commonly defined in terms of intensity or heating rate &
measured in 2 ways
Stoichiometrio Ratio - ✔✔The amount of air in balance with amount of fuel
Rarely happens - except in certain types of gas fires
, Current is measured in ? - ✔✔Amps
< or = 20% COHB - ✔✔Most likely died from other causes, lack of O2 Burns -
> or = 40% COHB - ✔✔Carbon monoxide alone
Pyrolysis - ✔✔Chemical change in matter caused by heat / burning
Resistance is measures in - ✔✔OHMs
Thermal conductivity of easily ignitable fuels like wood, plastic foam, or paper - ✔✔Is
very low
Flammable gas - ✔✔Can only be ignited by a spark or pilot flame over specific range
of gas concentrations expressed in LEL & UEL
Three forms of ignition that occur with solid fuels - ✔✔Smoldering ignition (initial of
solid phase burning)
Piloted flaming ignition
Flaming auto ignition
Thermal runaway - ✔✔Is an instability that occurs when heat generation exceeds
heat loss within the material. It is a contest between Exothermic chemistry and heat loss
to the surroundings
