NAFI CFEI UPDATED QUESTIONS AND CORRECT ANSWERS

NAFI CFEI UPDATED QUESTIONS AND
CORRECT ANSWERS

Question:
1. The basic methodology of the fire investigation should rely on the use of
a______________________and attention to all relevant details a systematic
Answer:
a systematic approach c . methodology approach d . g b . approximation approacheneral approach - AN-
SWER - a . systematic approach

Question:
2. Absolute Temperature
Answer:
Absolute A temperature measured in Kelvins ( K ) or Rankines ( R ) .

Question:
3. Accelerant
Answer:
A fuel or oxidizer , often an ignitible liquid , intentionally used to initiate a fire or increase the rate of
growth or spread of fire .

Question:
4. Accident
Answer:
ANSWER An unplanned event that interrupts an activity and sometimes causes injury or damage or a
chance occurrence arising from unknown causes ; an unexpected happening due to carelessness , ignorance
, and the like .

Question:
5. Active Fire Protection System
Answer:
A system that uses moving mechanical or electrical parts to achieve a fire protection goal .

Question:
6. Ambient
Answer:
Someone's or something's surroundings , especially as they pertain to the local environment ; for example ,
ambient air and ambient temperature .

Question:
7. Ampacity
Answer:
The maximum current , in amperes , that a conductor can carry continuously under the conditions of use
without exceeding its temperature rating .

,Question:
8. Ampere
Answer:
The unit of electric current that is equivalent to a flow of one coulomb per second ; one coulomb is defined
as 6.24 x 10 ^ 18 electrons .

Question:
9. Arc
Answer:
A high - temperature luminous electric discharge across a gap or through a medium such as charred
insulation .

Question:
10. Arc Mapping
Answer:
The systematic evaluation of the electrical circuit configuration spatial relationship of the circuit
components , and identification of electrical arc sites to assist in the identification of the area of origin and
analysis of the fire's spread .

Question:
11. Arc Site
Answer:
The location on a conductor with localized damage that resulted from an electrical arc .

Question:
12. Arcing Through Char
Answer:
Arcing associated with a matrix of charred material ( e.g. , charred conductor insulation ) that acts as a
semiconductive medium .

Question:
13. Area of Origin
Answer:
A structure , part of a structure , or general geographic location within a fire scene , in which the " point of
origin " of a fire or explosion is reasonably believed to be located .

Question:
14. Arrow Pattern
Answer:
A fire pattern displayed on the cross - section of a burned wooden structural member

Question:
15. Arson
Answer:
The crime of maliciously and intentionally , or recklessly , starting a fire . or causing an explosion .

, Question:
16. Autoignition
Answer:
Initiation of combustion by heat but without a spark or flame .

Question:
17. Autoignition Temperature
Answer:
The lowest temperature at which a combustible material ignites in air without a spark or flame .

Question:
18. Backdraft
Answer:
A deflagration resulting from the sudden introduction of air into a confined space containing oxygen -
deficient products of incomplete combustion .

Question:
19. Bead
Answer:
A rounded globule of re - solidified metal at the end of the remains of an electrical conductor that was
caused by arcing and is characterized by a sharp line of demarcation between the melted and unmelted
conductor surfaces .

Question:
20. Blast Pressure Front
Answer:
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
.

Question:
21. BLEVE
Answer:
Explosions involving vessels that contain liquids under pressure at temperatures above their atmospheric
boiling points .

Question:
22. Bonding
Answer:
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 .

Question:
23. British Thermal Unit ( BTU )
Answer:
The quantity of heat required to raise the temperature of one pound of water one degree Fahrenheit at the
pressure of one atmosphere and temperature of 60 degrees Fahrenheit .