Midterm Flashcards
types of fire investigators
public and private
NFPA
National Fire Protection Association
NFPA standard are qualification of fire and explosives investigator
1033
NFPA standard is guide for fire and explosive investigators
921
oldest known explosive
black powder
Black Powder
low explosive
JPR
job performance requirements
Scientific Method
pursuit of knowledge involving the recognition and definition of a problem
- hypothesis
- need for research
- define problem
- analyze data
- conduct research
- test hypothesis
explosions are always accompanied by violent increase in heat, overpressure, and an extremely loud noise
true
smallest grain of black powder
FFFF
What is the main explosive in modern day ammunition
smokeless powder
first step in explosive train
initiation
What is the primary use of ANFO
blasting
primary block detonation charge used by US military
C4
when do binary explosives become cap-sensitive (ready to detonate)
after mixing
there are 16 topics which a fire and explosives investigator should have an up-to-date basic knowledge of
true
which of the following is not a part of the scientific method
publish your report
which of the following is not published by the NFPA
law
what are the effects of an explosion
blast pressure, incendiary/thermal, fragmentation
what is deflagration
rapid exothermic burning reaction
what is a high order detonation
complete consumption of an explosive at its optimum velocity
2 examples of low explosives
black powder, smokeless powder
lowest temperature to produce flammable vapor
flash point
study of temperature
thermometry
3 classifications of fire investigation causes
accidental, incendiary, undetermined
transition from a fire in a room to a room on fire called
flashover
required to be investigator
18, high school diploma, background check
required for fire
fuel, oxidizing agent, heat, chemical chain reaction
most common type of fuel for fire
organic fuels
role of oxygen in combustion
required for combustion
boiling water transfers heat via
convection
types of review in fire investigation
administrative, technical, peer
2 people who conduct fire investigations
employed by police or fire department
why do we conduct fire investigation
evaluate facts, determine origin and cause
purpose of NFPA 1033
standard for professional qualifications
purpose of NFPA 921
guide for fire and explosion investigators
every fire scene is considered until proven otherwise
possible crime scene
IAAI stands for
International association of arson investigators
fire tetrahedron
fuel, oxygen, heat, chemical chain reaction
Heat is measured in
BTUs
black powdery or flaky substance continuing carbon
soot
3 ways of heat transfer
conduction, convection, radiation
heat form the sun is
radiation
which of the following is not a basic type of explosion
radiation
low explosives…
deflagrate
high explosives…
detonate
air is compromised of what % of oxygen
21%
military explosives relative effectiveness are compared to
TNT
commercial explosives relative effectiveness are compared to
ANFO
example of high explosive
dynamite
common fireworks are
pyrotechnics
powder that can get wet, dry out, and be used again
black powder
explosive that supplies its own oxygen
oxidizers
not 1 of 3 categories of high explosives
ANFO
class of explosives sensitive to heat, shock, friction
low explosives
sunburn would be an example of
radiation
heat transfer/burn from direct contact would be
conduction
which blast pressure phase of an explosive lasts longer
negative phase
most damage during explosion is during
positive phase
