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Calc and Place Study Guide > Advanced Steel (Chapter 10) > Flashcards

Advanced Steel (Chapter 10) Flashcards

1
Q
  1. How to determine saddle charge dimension?
A

Charge thickness: 1 inches
Base of Charge: ½ circumference of target
Long Axis of charge: circumference of target

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2
Q
  1. What is cutting method of saddle charge?
A

Cross fracture method

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3
Q
  1. What is ribbon charge formula
A

Charge Volume = Charge Thickness x Charge Width x Charge length

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4
Q
  1. How to find charge thickness?
A

½ Thickness of the target or minimum ½” of thickness (if thickness is less than ½”)

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5
Q
  1. How much build up is around primed caps?
A

½ inches surrounding the blasting cap

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6
Q
  1. Where are saddle charges primed?
A

At the long axis apex

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7
Q
  1. Where do you prime a ribbon charge?
A

Top center or either end of the ribbon charge

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8
Q
  1. What types of the explosives use for advanced steel?
A

Plastic and sheet explosive

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9
Q
  1. What is purpose of ribbon charge?
A

Used for flat steel up to 3” thick

• If thickness is greater than 3”, conduct test shot

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10
Q
  1. What are the volume of explosives?
A 
M112: 20
M186: 9
C2 Prima Sheet: 9.96
M1 dynamite: 10
TNT: 21.43
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11
Q
  1. How to calculate charge width and length?
A

Width: 3 x charge thickness
Length: Desired length cut

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12
Q
  1. How much explosive should be surrounding the blasting cap?
A

½” surrounding the blasting cap

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13
Q
  1. How to calculate diamond charge?
A

Use saddle charge formula CV=B^2

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14
Q
  1. What is the consideration of C shaped ribbon charge?
A

A) DET Cord branchlines must be the same length and connected with British junction or M151 Boosters
B) Same thickness, width, and length rules apply as a ribbon charge on flat steel

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15
Q
  1. Where is diamond charge primed?
A

At the short axis apexes

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16
Q
  1. What is purpose of C Shaped ribbon charge?
A

To cut structural steel

17
Q
  1. What are the three types of advanced steel charge?
A

Ribbon charge, C Shaped ribbon charge, saddle charge, and diamond charge
• Uses considerably less explosive than conventional charges

18
Q
  1. What is cutting method of Diamond charge?
A

Stress wave method

19
Q
  1. What type of charge would you use if the targets are steel plate, high carbon, and mild steel bar?
A

Mild steel bar: Saddle charge
High carbon: diamond charge
Steel plate: ribbon charge

20
Q
  1. What is the formula for a Saddle charge?
A

CV = B^2

21
Q
  1. What is purpose of diamond charge?
A

To cut high carbon, alloy steel bar circular or square up to 8 inches in diameter

22
Q
  1. What is purpose of saddle charge?
A

Used on Mild steel bars (Round, Square, rectangular) up to 8 inches in diameter

Calc and Place Study Guide (15 decks)

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