Flashcards in Dirt Deck (14):

1

## 1lb of explosives is used per how many inches of hard surface/pavement IOT breach for manual digging? What are the tamping rules?

### 2". Tamp twice the breaching radius.

2

## HASTY CRATER CONSTRUCTION: How many lbs per hole? what is the spacing?

### 50 lbs per hole. 5' on center.

3

## How many lbs of explosive are in the 5' and 7' boreholes of a deliberate crater?

### 5' = 40 lbs 7' = 80 lbs

4

## For a RELIEVED FACE crater what are the depths of the boreholes and how many lbs of explosives go in each bore hole per side?

### ENEMY: 4' = 30 lbs. FRIENDLY: 5' = 40 lbs.

5

## What is the ratio of fuel mix for EXPEDIENT cratering charge?

### 1 qt per 25 lbs of fertilizer.

6

## What is the optimal percentage of nitrogen in Ammonium Nitrate to use for an expedient cratering charge?

### 33 1/3 %

7

## How should your expedient charge be primed?

### 1 lb of TNT ; (dual priming recommened)

8

## What are the rules for lbs of explosives for removal of each type of stump or tree?

### Round the diameter to the next higher 1/2' ft DEAD: 1lbs per 1' of diameter LIVE: 2 lbs per 1' of diameter. TREE: 3 lbs per 1' of diameter

9

## What are the three types of boulder removal?

### SNAKE HOLE METHOD: Dig hole under boulder large enough to hold charge them tamp. MUDCAP METHOD: Place charge on a crack in the boulder and cover with 10 - 12 inches of mud or clay. BLOCK HOLE METHOD: Drill hole in top of boulder deep and wide enough to hold charge. Prime charge with det cord and tamp

10

## What is the formula for HASTY CRATER?

### N = L - 16 / 5 + 1

11

## What is the formula for DELIBERATE craters?

### N = L - 16 / 5 + 1

12

## What is the formula for RELIVED FACE crater?

### N = L - 10 / 7 + 1

13

## What does it take for cratering to be effective?

### Too wide for track vehicles to span. Too steep for vehicles to pass. If it takes 4 attempts for vehicles to pass.

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