Conventional Steel (Chapter 9) Flashcards
1
Q
- What is steel cutting formula for High carbon or alloy steel?
A
P = D^2
2
Q
- What is the conventional steel cutting formula?
A
P = .375 x AREA
3
Q
- What are the volume of explosives?
A
M112: 20 M186: 9 C2 Prima Sheet: 9.96 M1 dynamite: 10 TNT: 21.43
4
Q
- What is TNT requirement for Rails?
A
5” or higher use 1lb of TNT
Less than 5” use ½ lb of TNT
5
Q
- What types of explosives are used for steel cutting?
A
Plastic and sheet explosives
6
Q
- What is minimum RE factor for steel cutting?
A
1.0 (TNT). Steel cutting requires high RE explosive to cut precisely
7
Q
- What are the consideration for place steel charge?
A
A) Direction of initiation is perpendicular to the target
B) When the charge extends past the Flange, Split the charge and offset the charge
8
Q
- What is TNT requirement of FROGS?
A
2 lbs of TNT
9
Q
- What is charge placement on steel bar that 3” thick or larger?
A
Offset the charge. Place on each side of the target staggered to produce maximum shearing effect
10
Q
- What is most critical factor in conventional steel charge?
A
Target to charge contact
11
Q
- What is TNT requirement of Crossover and switches?
A
1 lb of TNT
12
Q
What is rule for malleable steel charge?
A
Up to 1” diameter use 1 lb of explosive
Between 1” to 2” diameter use 2 lbs of explosive
Over 2” diameter use P=D^2 formula
13
Q
- What is maximum thickness of steel charge?
A
No more than 6” thick
14
Q
- What is the preferred method to cutting hard metal?
A
Thermite, acetylene, or electrical cutting
15
Q
- What are the three important factors in steel cutting?
A
Type, size, and placement of charge
