NAFI CFEI Practice Test Questions with100%
Correct Answers
Fire
A rapid oxidation process which is a chemical reaction resulting in the evolution of light and heat
in varying intensities
Fire Plume
Creation of hot gases by fire; the hot gases rise above the fire itself
Flame Spread
Classified as concurrent or counterflow:
concurrent (wide-aided flame spread) occurs when flame spread direction is the same as the gas
flow or wind direction; counterflow-(opposed flame spread) occurs where the flame spread
direction is counter to or opposed to the gas flow
Heat
a form of energy characterized by vibration of molecules and capable of initiating and supporting
chemical changes and changes of state
Ignition Temperature
Minimum temperature a substance should attain in order to ignite under specific test conditions
Lower Explosive Limit (LEL)
The minimum percentage of fuel in air (by colume) in which combustion can occur
Upper Explosive Limit (UEL)
,The maximum percentage of fuel in air in which combustion can occur
Melting Point
Phase change; the material changes from a solid to a liquid with no change in the chemical
structure of the material (melting candle wax)
Pyrolysis
A process in which material is decomposed. or broken down, into simpler molecular compounds
by the effects of heat alone; pyrolysis often precedes combustion
Specific Gravity (Vapor Density)
The ratio of the average molecular weight of a gas or vapor to the average molecular weight of
air
Specific Gravity
The ratio of the mass of a given volume of a subtance to the mass of an equal volume of water at
a temperature of 4*C
Combustible Liquid
Flash Point @ or above 100*F
Flammable Liquid
Flash Point less tha 100*F
Ignitable Liquid
Both combustible and flammable liquids are ignitable liquids.
, Demonstrative
Tangible items, see, touch, smell, hear.
Documentary
Written form; business records, banking, calenders, phone records, fire reports, etc.
Testimonial
Competent live wtiness speaking udner oath; two types; facts and expert
Illustrative
Photos, sketches, maps, diagrams. Modes are frequently used at trial. Photos and Videos; what,
why, how.
Evidence Collection
Document in place, document the collection, use proper container, (flag, bag, and tag)
Heat Transfer
The transport of heat energy from one point to another caused by a temperature difference
between those points
True
T/F: Sparks from an aluminum wheel are not competent ignition source
True
T/F: The most common source of an open flame in a vehicle is an exhaust system backfire out of
a carburetor
Correct Answers
Fire
A rapid oxidation process which is a chemical reaction resulting in the evolution of light and heat
in varying intensities
Fire Plume
Creation of hot gases by fire; the hot gases rise above the fire itself
Flame Spread
Classified as concurrent or counterflow:
concurrent (wide-aided flame spread) occurs when flame spread direction is the same as the gas
flow or wind direction; counterflow-(opposed flame spread) occurs where the flame spread
direction is counter to or opposed to the gas flow
Heat
a form of energy characterized by vibration of molecules and capable of initiating and supporting
chemical changes and changes of state
Ignition Temperature
Minimum temperature a substance should attain in order to ignite under specific test conditions
Lower Explosive Limit (LEL)
The minimum percentage of fuel in air (by colume) in which combustion can occur
Upper Explosive Limit (UEL)
,The maximum percentage of fuel in air in which combustion can occur
Melting Point
Phase change; the material changes from a solid to a liquid with no change in the chemical
structure of the material (melting candle wax)
Pyrolysis
A process in which material is decomposed. or broken down, into simpler molecular compounds
by the effects of heat alone; pyrolysis often precedes combustion
Specific Gravity (Vapor Density)
The ratio of the average molecular weight of a gas or vapor to the average molecular weight of
air
Specific Gravity
The ratio of the mass of a given volume of a subtance to the mass of an equal volume of water at
a temperature of 4*C
Combustible Liquid
Flash Point @ or above 100*F
Flammable Liquid
Flash Point less tha 100*F
Ignitable Liquid
Both combustible and flammable liquids are ignitable liquids.
, Demonstrative
Tangible items, see, touch, smell, hear.
Documentary
Written form; business records, banking, calenders, phone records, fire reports, etc.
Testimonial
Competent live wtiness speaking udner oath; two types; facts and expert
Illustrative
Photos, sketches, maps, diagrams. Modes are frequently used at trial. Photos and Videos; what,
why, how.
Evidence Collection
Document in place, document the collection, use proper container, (flag, bag, and tag)
Heat Transfer
The transport of heat energy from one point to another caused by a temperature difference
between those points
True
T/F: Sparks from an aluminum wheel are not competent ignition source
True
T/F: The most common source of an open flame in a vehicle is an exhaust system backfire out of
a carburetor
