Dirt Cratering (Chapter 12)

Question 1

34. What is explosive requirement for Dead stumps?

Answer 1

1lb of explosive is used per 1’ of diameter

Question 2

13. What is the spacing between deliberate crater boreholes?

Answer 2

Same as hasty crater

Question 3

32. An expedient cratering charge should prime with what

Answer 3

Prime with 1lb of TNT (dual priming is recommended)

Question 4

27. What is formula to calculate relieved face crater?

Answer 4

N= (L-10/7)+1

* calculate number of charges for friendly row of boreholes*

Question 5

14. What is characteristics of deliberate crater?

Answer 5

V shaped, 7-8 feet deep & 25-30 wide with 37 degree slope

Question 6

17. What is measurement requirement for end of deliberate crater?

Answer 6

End boreholes are 7’ deep

No two 5’ holes sides by sides

Question 7

35. What is explosive requirement for live stumps?

Answer 7

2bls of explosive is used per 1’ of diameter

Question 8

21. What is measurement and explosive requirement of enemy row?

Answer 8

4’ deep with 30lbs explosive

Question 9

33. How to measure stump removal?

Answer 9

Stumps are measured 12-18” above ground level then diameter is rounded to next higher ½ foot

Question 10

6. What is the spacing between hasty crater boreholes?

Answer 10

From center to center 5’ between boreholes

Question 11

2. An effective craters takes _______ allowing time to employ AT weapon

Answer 11

4 or more passes

Question 12

3. How to improve craters?

Answer 12

By digging face vertically on friendly side, mining, and any other means to further delay the ENY

Question 13

9. What is characteristics of hasty crater?

Answer 13

V shaped, 6-7 feet deep & 20-25 wide with 25-35 degree side slope

Question 14

31. What is fuel oil requirement for fertilizer?

Answer 14

1 quart per 25lbs of fertilizer

Question 15

5. What is minimum weight of explosive used in hasty craters?

Answer 15

At minimum 50lbs of explosive

Question 16

22. To construct deliberate crater, which row will be fired first?

Answer 16

Enemy row

Question 17

29. For breaching hard surface pavement, use how many pound of explosives for pavement?

Answer 17

1 pound for every 2 inches of pavement and tamp charge twice the thickness of the pavement

Question 18

15. What is measurement of deliberate crater boreholes?

Answer 18

A combination of 5’ and 7’ deep

Question 19

24. What is the placement of row when constructing relieved face crater?

Answer 19

On Dirt or Gravel roads: 8’ apart

On Hard surface road: 12’ apart

Question 20

36. What is explosive requirement for complete tree?

Answer 20

3lbs of explosive is used per 1’ of diameter

Question 21

30. How much nitrogen must be contained in Ammonium nitrate fertilizer?

Answer 21

33 1/3% of nitrogen

Question 22

8. What is hasty crater blowout distance?

Answer 22

Approximately 8’

Question 23

39. What are the three method of boulder removal?

Answer 23

Snake-hole, mudcapping, and block-hole method

Question 24

26. What is the characteristics of relieved face crater?

Answer 24

Trapezoidal shape, 7-8 deep and 25-30 feet wide with unequal side slopes

Question 25

7. For hasty crater, what is average traverse attempts of modern tanks?

Answer 25

Average of 4 attempts

Question 26

37. What is taproot hole depth equivalent to?

Answer 26

Equal to breaching radius

Question 27

20. What is measurement and explosive requirement of friendly row?

Answer 27

5’ deep with 40lbs explosive

Question 28

25. For relieved face crater, how would you place first borehole?

Answer 28

First borehole placed 5’ in from desired edge of crater

Question 29

23. What is the spacing between relieved face crater boreholes?

Answer 29

From center to center 7’ between boreholes

Question 30

38. What is lateral hole depth equivalent to?

Answer 30

Equal to breaching radius, place long side of root

Question 31

16. What is minimum explosive requirement of deliberate crater boreholes?

Answer 31

5’ holes will have 40 lbs of explosive | 7’ holes will have 80 lbs of explosive

Question 32

18. What is formula of deliberate crater?

Answer 32

N = (L-16/5) +1

Question 33

4. For hasty crater, what is minimum depth of boreholes?

Answer 33

At least 5’ deep

Question 34

1. What is the requirement of effective craters?

Answer 34

Must be too wide for track vehicles to span & too steepsided for vehicles to pass

Question 35

12. For deliberate crater, what is average traverse attempts of modern tanks?

Answer 35

Average of 8 attempts

Question 36

10. What is the formula for hasty crater?

Answer 36

N= (L-16 / 5)+1 | Round up any fractional number of holes to next higher number

Question 37

19. What are the two types of row requires to construct relieved face crater?

Answer 37

Friendly row and Enemy row

Question 38

28. How to calculate number of enemy row boreholes?

Answer 38

Number of friendly row borehole – 1 hole

Question 39

11. What is deliberate crater blowout distance?

Answer 39

Approximately 8’