Explosives

Question 1

What is an explosive?

Answer 1

Sudden release of a large amount of energy

• In the form of blast waves
• By propulsion of debris
• By the emission of radiation

Question 2

What are 4 types of explosions?

Answer 2

Atomic
Electrical explosions
Physical explosions and
Chemical explosions

Question 3

Name 4 oxidation reactions

Answer 3

Rust
Combustion
Deflagration
Detonation

Question 4

What are low explosives propellants?

Answer 4

• Used to accelerate projectiles, such as bullets, rockets or fireworks
• Reaction proceeds via deflagration
• Speed of reaction is slower than the speed of sound
• Some common low explosives include’ smokeless powder (quick reaction), black powder (even faster than smokeless) and pyrodex

Question 5

What are low explosives pyrotechnies?

Answer 5

-Devices that contain combustible material designed to provide a visual or audio effect
(fireworks)

Question 6

What are high explosives?

Answer 6

-Detonates- Reaction speed> speed of sound
-No confinement required
• Primary high explosives
o Sensitive to chock and heat
o Detonates, priming caps (ammo)
• Secondary high explosives
o Less sensitive, more powerful
o Requires large energy input to detonate
o Numerous commercial and military applications

Question 7

What are 2 types of analysis?

Answer 7

Intact explosive analysis:The analysis and identification of suspected explosives or their key constituents- also known as Bulk analysis
-Trace explosive analysis :This is usually the analysis of post-blast debris and residues to determine what substances may have been responsible for an explosion

Question 8

Describe intact explosive analysis

Answer 8

• The class of explosive and the identity of major constituents are reported
• Usually cannot identify explosives from specific manufacturers or source
• Sample may be identified as a material that is not an explosive