Advanced Steel

Question 1

4 types of charges

Answer 1

Ribbon
C-shapes ribbon
Saddle
Diamond

Question 2

Excessive molding of m112 can reduce its density by as much as ____

Answer 2

25%

Question 3

Ribbon charge

Answer 3

Used in flat steel up to 3” thick
If greater than 3” perform test shot
Primed with single cap at end or center

Question 4

Ribbon charge formula

Answer 4

Charge volume = charge thickness x charge width x charge length

Question 5

Charge thickness

Answer 5

1/2 the thickness of the target, minimum 1/2” thick

Question 6

Charge width

Answer 6

3 x the charge thickness

Question 7

Charge length

Answer 7

= length of cut

Question 8

C shaped ribbon charge

Answer 8

Det cord branch lines must be the same length and connected with British junction or m151 boosters can be used for simultaneous detonation
C is primed in the middle, two flange charges primed on outside.
Same calculations as ribbon charge

Question 9

Always maintain a ____ of explosives around blasting caps

Answer 9

1/2”

Question 10

Saddle charge used on

Answer 10

Mild steel bars (round, square, or rectangular) pup to 8” in diameter
Charge is 1” thick

Question 11

Saddle charge utilizes ____ to cut steel

Answer 11

Cross fracture method

Question 12

Prime saddle charge at

Answer 12

Apex of long axis

Question 13

Saddle charge dimensions

Answer 13

Thickness= 1”
Base= 1/2 circumference of target
Long axis= circumference of target

Question 14

Volume of saddle charge=

Answer 14

Base^2

Question 15

Diamond charge utilizes ____ to cut steel

Answer 15

Stress wave method

Question 16

Diamond charge used on

Answer 16

High carbon or alloy steel up to 8” in diameter.

Question 17

Diamond charge formula

Answer 17

Same as saddle charge