NAFI CFEI Exam Test Questions With 100% Verified
Solutions
Backdraft
A deflagration resulting from the sudden introduction of air into a confined
space containing oxygen-deficient products of incomplete combustion.
Bead
A rounded mass of resolidified metal on the end of the remains of an
electrical conductor or conductors that was caused by arcing and is
characterized by a sharp line of demarcation between the melted and
unmelted conductor surfaces.
Blast Pressure Front
The expanding leading edge of an explosion reaction that separates a
major difference in pressure between normal ambient pressure ahead of
the front and potentially damaging high pressure at and behind the front.
BLEVE
Boiling Liquid Expanding Vapor Explosion
Bonding
The permanent joining of metallic parts to form an electrically conductive
path that ensures electrical continuity and the capacity to conduct safely
any current likely to be imposed.
British Thermal Unit (BTU)
The quantity of heat required to raise the temperature of one pound of
water 1 degree F at the pressure of 1 atmospheric and temperature of 60
degrees F.
Calcination of Gypsum
, A fire effect realized in gypsum products, including wallboard, as a result of
exposure to heat that drives off free and chemically bound water.
Calorie
Amount of energy needed to raise temperature 1 gram of water 1 degree C
Cause
The circumstances, conditions, or agencies that brought about or resulted
in the fire or explosion incident, damage to property , bodily injury, or loss
of life.
Ceiling Jet
A relatively thin layer of flowing hot gases that develops under a horizontal
surface (e.g., ceiling) as a result of plume impingement and the flowing gas
being forced to move horizontally.
Char
Carbonaceous material that has been burned or pyrolyzed and has a
blackened appearance.
Char Blisters
Convex segments of carbonized material separated by cracks or crevasses
that form on the surface of char, forming on materials such as wood as the
result of pyrolysis or burning.
Clean Burn
A distinct and visible fire effect generally apparent on noncombustible
surfaces after combustible layer(s) (such as soot, paint, and paper) have
been burned away. The effect may also appear where soot has failed to be
deposited because of high surface temperatures.
Combustible
Capable of undergoing combustion.
Combustible Gas Indicator
Solutions
Backdraft
A deflagration resulting from the sudden introduction of air into a confined
space containing oxygen-deficient products of incomplete combustion.
Bead
A rounded mass of resolidified metal on the end of the remains of an
electrical conductor or conductors that was caused by arcing and is
characterized by a sharp line of demarcation between the melted and
unmelted conductor surfaces.
Blast Pressure Front
The expanding leading edge of an explosion reaction that separates a
major difference in pressure between normal ambient pressure ahead of
the front and potentially damaging high pressure at and behind the front.
BLEVE
Boiling Liquid Expanding Vapor Explosion
Bonding
The permanent joining of metallic parts to form an electrically conductive
path that ensures electrical continuity and the capacity to conduct safely
any current likely to be imposed.
British Thermal Unit (BTU)
The quantity of heat required to raise the temperature of one pound of
water 1 degree F at the pressure of 1 atmospheric and temperature of 60
degrees F.
Calcination of Gypsum
, A fire effect realized in gypsum products, including wallboard, as a result of
exposure to heat that drives off free and chemically bound water.
Calorie
Amount of energy needed to raise temperature 1 gram of water 1 degree C
Cause
The circumstances, conditions, or agencies that brought about or resulted
in the fire or explosion incident, damage to property , bodily injury, or loss
of life.
Ceiling Jet
A relatively thin layer of flowing hot gases that develops under a horizontal
surface (e.g., ceiling) as a result of plume impingement and the flowing gas
being forced to move horizontally.
Char
Carbonaceous material that has been burned or pyrolyzed and has a
blackened appearance.
Char Blisters
Convex segments of carbonized material separated by cracks or crevasses
that form on the surface of char, forming on materials such as wood as the
result of pyrolysis or burning.
Clean Burn
A distinct and visible fire effect generally apparent on noncombustible
surfaces after combustible layer(s) (such as soot, paint, and paper) have
been burned away. The effect may also appear where soot has failed to be
deposited because of high surface temperatures.
Combustible
Capable of undergoing combustion.
Combustible Gas Indicator
