17 - A-2-1-73 Flashcards Preview

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Flashcards in 17 - A-2-1-73 Deck (20):
1

what is velocity of LOW Order detonation?

less than 8200 ft/s (2499 m/s)

2

√√ during a deflagration large fragments of munition casing may be projected how far?

656 ft (200M)

3

√√ Does a low order or deflagration consume greater amounts of explosive filler?

deflagration consumes more filler

4

during a deflagration to detonation transfer how much volume of gas is released with the explosive release of heat?

about a liter per gram

5

√√ The EOD tech can adjust violence of the reaction through exploiting what areas of the munition?

the fuze well, baseplate - as compared to the center of the bomb

6

how might an EOD tech achieve structure failure

explosively cutting a groove via linear shape charge, the weakened part fractures , decreasing confinement, reducing reaction rate = low order

7

√√ explosive volatility is related to what characteristic of the explosive?

the plasticity

8

√√ do either plastic explosives (PBX) or cast (brittle: TNT/tritonal) explosives exhibit greater volatility?

cast exhibit greater volatility

9

when using a thermite on a U.K. 1000 lbs bomb how long does it take for them to deflagrate?

8 minutes

10

what weapon calibers is usually used against sub-munition clearance?

5.56 or 7.62mm

11

√√ what type of ammunition may initiated a deflagration of a bomb (larger submunitions)?

.50 cal API ( armor piercing incendiary) (ROFOUS). .50 ball rounds have little or no effect on a bomb.

12

are thermites typically used against landmines/bombs? or projo/rockets?

landmines/bombs

13

what are the two effects that a pancake charge produces in regards to low orders ?

first induces ignitions , second the hole reduces confinement of the case

14

gas develops, cant escape, the increase pressure accelerates the reaction rate inside the munition describes what?

Deflagration

15

√√ Cast explosives fracture easily=large surface area allows for increased burning reaction = higher volatility ? T/F?

yes

16

√√ What is the problem with trying to burn TNT filled projos?

fuze well is small and oxygen is prevented from entering the round, extinguishing the burning reaction

17

√√ The rate of reaction can be affected by?

Confinement, the strength of the ignition stimulus, or the volatility of the explosive filler. Increase pressure accelerate the reaction rate, in-turn accelerates the gas evolution

18

Possible outcomes for 5.56 7.62 on submunitions?

sometimes deflagrations, mechanical damage; variable to no reaction at all.

19

EFP examples?

Mk 23 or 24 EXRODs (normally to powerful for low order, but variations with standoff they may be used

20

Shape Charges can be used to low order? how?

Yes, varying liner (thickness, angle, shape), charge length, dia, confinement, standoff etc