17 - A-1-1-31 Flashcards Preview

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Flashcards in 17 - A-1-1-31 Deck (56):
1

Explosives with high velocity and brisance are best for most EOD applications?

True

2

Exp with lower velocity of detonatoin are best for cratering ditching and quarrying?

true

3

what explosive is in the M118?

PETN/RDX (4 .50lbs sheets)

4

all pers engaged in operations shall be thoroughly trained in explosive safety?

true

5

√ how much is cut from free end of safety fuse to prevent moisture from the air?

6''

6

√ how far and where is the test burn of safety fuse?

50 ft downwind from any explosive

7

what is the AF length requirement for fuse testing?

1'

8

√ M700 safety fuse should burn at what rate?

40 seconds/foot

9

older types of safety fuse should burn at what rate?

35-45 seconds/foot

10

what is the minimum for safety fuse to reach a safe distance walking?

6ft (1.83m)

11

Crimp blasting cap how far from open end?

3-6mm (1/8" 1/4")

12

during incliment weather place second crimp how far above first?

3mm 1/8''

13

what is the wait time for safety fuse?

1hr

14

how many pyrotechnic leads can fit on the MK 52 Mod 0 pyrotechnic lead connector?

6

15

√ what is the wait time for shock tube?

30 min

16

√ how much shock tube do you cut from a misfire ?

3 ft, than reattach

17

what five things are common in electric misfires?

all caps are included, all connections are made, no shorts circuits, grounds are avoided, caps do not exceed power source

18

wait time for electric misfire?

30 min

19

electric misfire procedures?

3 successive attempts, remove wires, reconnect 3 more trys, check connection terminals connection 3+ try, change blasting machine, disconnect firing wire ends shunt

20

T/F dust and snow storms, moving belts, revolving tires can produce enough static electricity to set off caps?

true

21

√ how many branch lines are connected to a main line at one point?

One. A branch line is never connected to a main line at a splice

22

T/F a branch line is never connected to a main line at a splice in the main line?

true, dont do it

23

non electric caps may be used to what depth when on det cord?

300 ft (91.44m)

24

trunk and main lines will initiate explosive to what depths?

3-4K ft

25

√ M1 clip is used to connect two individual lengths of det cord parallel to each other at right angles? T/F

true, main line inserted into the tongue, branch lines into the "U"

26

√ Main line shall be inserted into the tongue of M1 clip? and overlapped how many inches?

true, 6'' overlap

27

when tape is used to splice two lengths of det cord how much overlap and how long pigtails?

6'' overlap, 6'' pigtails

28

alternate method 2 has how many wraps?

4 wraps

29

whipping has how many wraps?

8 wraps

30

√ For charges over 1.25 lbs (567g) how many wraps?

pyramid 7 wraps on top of 9 wraps

31

to prime plastic explosive with double strand det cord cut two lengths of det cord how long?

36''

32

what are the authorized methods of disposal?

burning (surface, trench, pit), detonation , static firing

33

√√ Surface burn - how big is the square pad?

300X300 ft

34

√√ how far out border around burn pad is free of combustible material?

200ft

35

√√ burn sites on the pad shall not be closer than ___ from another burn site?

50 ft

36

√√ what is the wait time for anyone returning to the burn pad after the burn has extinguished itself?

30 min

37

√√ what is the wet down time before successive burns?

2 hours

38

√√ if water facilities are not available to wet down what is the elapsed time for successive burns?

4 hours

39

√√ black powder burns are not to be repeated on the same burn site until at least __ has elapsed?

24 hours

40

when is pit/trench burning preferred?

when material might become propulsive

41

what is the biggest round for trench burning?

30mm, larger primers 76mm(3'') and above

42

during burning and material may flow into another burn pile construct a small dam how tall?

3" (76mm)

43

what is the distance between missile motor disposals if disposing more than one at a time?

300ft

44

placement of the donor charge should be taped and placed where?

on mortar should be on gas check bands/obturator
on projos should be thinnest part (usually body)

45

T/F fuze well should be primary should be primary location for disposal explosive for IM?

True

46

NO17 √√ What is the current needed to fire military electric caps in series?

1.5 amps

47

NO17 √√ what is the current needed to fire military electric caps in parallel?

.60 amps per blasting cap

48

NO17 what is the resistance of military grade blasting caps?

2 ohms

49

NO17 √√ if AN-M14 are frozen what is the thaw time and temperature?

room temperature (70 degrees) 2-5 days

50

NO17 pour smokeless powder into grenade until the cavity is filled up how much?

fill to cavity is 1/2 full

51

NO17 how much explosive for aircraft ejection seat rocket pack?

.625 lbs plastic exp

52

√√ Insert new fused blasting cap without disturbing old cap, or place new charge close to but not touching, when necessary a misfired cap may be removed and new cap inserted

ovbi

53

√√ Tactical sectarios may require misfire investigation before 30 mi WT?

Yes

54

√√ Dual firing system consist of?

2 independent ele or non-ele systems, or combination of one ele and one non-ele. Each capable of firing the system independently

55

What does the card count test, test?

determine sensitivity to shock pressure of exp ingredients

56

√√ For IM the invitation of booster exp should aid in the set of IHE? Placement of bang?

Yes, try and get close to the booster, 180˚ apart close to but not touching