Lesson 28 - Chemical Explosives and Power Index

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11 Terms

1
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When an explosive detonates what does it turn into ?

  • Gasses

  • Heat 

  • Residue (soot)

2
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Mechanical explosion

Over-pressurized container

3
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Chemical explosion 

Change chemical bonds (electrons)

4
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Nuclear explosion 

Change nucleus of atoms (neutrons and protons)

5
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To be a useful chemical explosive, what must the reaction exhibit?

  • Controlled

  • Formation of gases

  • Release of heat

  • Rapid reaction

6
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Deflagration

A rapid combustion, subsonic wave propagation/burning

7
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Detonation

Supersonic shock wave propagation 

8
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Name the two groups high explosives are subdivided into and describe them

  • Primary: more sensitive to shock, used as detonators

  • Secondary: less sensitive to shock, used as boosters and main charges

9
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What is the purpose of the explosive “train”?

Safety

10
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What happens if oxygen balance (OB) is <0? >0?

  • If OB = 0, desired

  • If OB < 0, oxygen deficient and leftover explosive material

  • If OB > 0, oxygen rich and could have burned more explosive material

11
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What is the normal reference for power index?

TNT