Chapter 18

Question 1

Fires and explosions result of

Answer 1

combustion

Question 2

Combustion

Answer 2

Reaction of fuel with oxygen

Question 3

products of combustion

Answer 3

CO2
water
energy

Question 4

Exothermic

Answer 4

chemical reaction releases energy as product

Question 5

Endothermic

Answer 5

required input of energy

Question 6

Activation energy

Answer 6

reaction require some input of energy for initial on

Question 7

fire tetrahedron

Answer 7

oxygen
heat
fuel
chain reaction

Question 8

flash point

Answer 8

lowest temp allow liquid produce a flammable vapor

Question 9

flame point

Answer 9

lowest temp that will sustain combustion

Question 10

flashback

Answer 10

fire burned with limited supply of oxygen then suddenly ventilated

Question 11

Types of fire

Answer 11

natural
accidental
deliberate

Question 12

first step of analysis

Answer 12

isolate the accelerant from matrix

Question 13

second step

Answer 13

determine nature of accelerant

GC or MS

Question 14

Headspace

Answer 14

sampled with gaslight syringe and injected into GC

Question 15

passive adsorption

Answer 15

container or strip coated with charcoal places in suspected container

Question 16

active absorption

Answer 16

charcoal tubes inserted and air pumped through tubes into container

Question 17

Solid Phase micro extraction

Answer 17

inserting fiber with adsorbent into headed container

GC

Question 18

Mass spectrometry

Answer 18

individual components of residues

Question 19

blast pressure

Answer 19

escaping gases
pressure wave
vacuum created

Question 20

low explosives

Answer 20

below 3,280 fps

Question 21

high explosives

Answer 21

3,280 psi and up

Question 22

high order explosion

Answer 22

at least near its maximum theoretical detonation velocity

Question 23

low order explosion

Answer 23

less than optimal efficiency

Question 24

low explosive trains

Answer 24

two step

fuse black powder used to ignite smokeless powder

Question 25

high explosives trains

Answer 25

final is usually secondary

blasting calps

Question 26

two types of residue

Answer 26

undetonated and exploded

Question 27

vapor trace analyzer

Answer 27

find explosive residues

GC

Question 28

How visual examination works

Answer 28

isolates explosive residues from matrix

Question 29

thin layer chromatography

Answer 29

color reagents

Question 30

high performance liquid chromatography

Answer 30

quantitative analysis

Question 31

Infrared spectrophotometry

Answer 31

confirmatory test