Military Explosives (Chapter 1) Flashcards Preview

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Flashcards in Military Explosives (Chapter 1) Deck (56)
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1. What is R.E factor?

R.E stands for Relative Effectiveness which represents a measurement of an explosive’s power compared to TNT

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3. What are the four common types of Block demolition charge?

TNT, M112, M1 DYNAMITE, AND 40lb Cratering charge

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4. What is block demolition charge?

Prepackaged HE (high explosive) Charges that are used for general purpose task (cutting, breaching, and cratering)

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5. Describe TNT

Trinitrotulene (TNT), is the baseline to rate all military explosives using the R.E Factor

Most often composite form of H6, Comp B, Comp B4

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6. How is TNT packaged?

¼, ½, and 1 lb blocks

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7. What are the advantage of TNT?

Effective for all types of demolition work except steel cutting

Insensitive to shock or friction

Convenient size and shape for charge construction

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8. What is the disadvantage of TNT?

Cannot be molded and is difficult to use on irregular shaped targets

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9. What are the composition explosive?

Composition A
Composition B
Composition H6
Composition C4

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10. What is effective temperatures of C4?

Between -70 F and 170 F

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11. What happens to C4 in colder temperatures?

Loses its plasticity

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12. What are the components of C4?

90% RDX
9% NON-EXPLOSIVE PLASTICIZER
1% Taggant (odorizer)

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13. What is M112 Block demolition charge?

Primary block demolition charge in U.S. Army. Ideally suited for irregularly shaped targets.It can be “CUT” and “MOLDED”. Primarily used for cutting and breaching because of high RE.

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14. What does M112 consist of?

1 ¼ lb of composition C4

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15. What is R.E factor of Dynamite?

0.92

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16. Is there any difference between commercial dynamite and military dynamite?

The strength of military dynamite is 60% strength of commercial dynamite.

Commercial is made of nitroglycerin, military is 75% RDX, 15% TNT, 10% Desensitizers and plasticizers

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17. What does M1 dynamite consist of?

75% RDX
15% TNT
10% Desensitizers and plasticizers

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18. How M1 dynamite issued?

Issued in ½ lb cylindrical cartridges measuring 1 ¼” x 8”

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19. What is primary used of M1?

Stump removal, military construction, quarrying, ditching, and service demolition work

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20. What is and advantage of M1?

Reliable underwater for up to 24 hours

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21. What is disadvantage of M1?

Not effective as cutting or breaching charge

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22. What is R.E factor of composition H6?

1.33

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23. What is composition H6 used for? What is it made of?

Used in cratering charges, general purpose bombs, MOAB (Massive Ordnance air blast), Naval torpedoes, and Land mines

44% RDX
29.5% TNT
21% AL
5% wax
0.5% Calcium Chloride

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24. What does MOAB stand for?

Massive Ordnance Air Blast

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25. What is purpose of 40lb Cratering charge?

Primarily used for Crater and Ditching operation, also effective at destroying buildings, fortifications, and bridge abatements

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26. What is a 40lb cratering charge made of? How does 40lb cratering charge issued?

30 lbs Ammonium Nitrate
10 lbs TNT

Issued in a watertight, cylindrical metal container

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27. How does 40lb cratering charge prepared?

Prime Charge with 2 blocks M112 on both side

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28. What are Sheet explosives?

Explosive packaged in a roll form that are adaptable for demolishing targets that require flexible explosives. Can be cut to the length and shape as you desire. M186 and C2 Primasheet

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29. What are the two common types of sheet explosives?

M186 ROLL, and C2 PRIMASHEET

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30. How is M186 ROLL issued? And what is it ideal for?

50’ roll form with plastic spool, issued with 15 M8 blasting cap holders

Ideal for longer targets because it can be cut to exact lengths

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31. What is the thickness of M186?

C6 Thickness
Means 6 grams of explosive per square inch