Demolition Procedures

Question 1

How is a blasting machine rated?

Answer 1

Rated for caps in series.

Question 2

What is the difference between military and civilian blasting caps?

Answer 2

Military: More Powerful but Less Sensitive.

Question 3

What is the proper procedure to dual prime civilian blasting caps?

Answer 3

Civilian blasting caps need to both be in the same hole.

Question 4

How long should you wait before attempting to clear an electrical misfire?

Answer 4

30 minutes.

Question 5

What is one advantage of an electrical circuit for demolition?

Answer 5

More control over your shot.

Question 6

Where must blasting caps be temporarily stored while preparing a demolition shot?

Answer 6

At least 25 feet away from explosives until final Priming.

Question 7

How many holes are necessary for a lacing technique?

Answer 7

Four.

Question 8

How many wraps for a hasty whip minimum?

Answer 8

Four.

Question 9

Which knots could you use to attach two pieces of det court together?

Answer 9

Square knot or modified girth hitch.

Question 10

Which knot would you use to initiate c-4 with unsensitized that cord?

Answer 10

Double overhand or ULI knot.

Question 11

Which knot would you use to type II pieces of det cord together to form a longer length?

Answer 11

Square knot.

Question 12

Which knot could you use to attach Det cord to Dynamite?

Answer 12

Lace or Hasty whip.

Question 13

What would you use a galvanometer for?

Answer 13

Checking firing wire and electric blasting caps for continuity.

Question 14

Whatnot would you use to attach a branchline to either a ring main or a main line?

Answer 14

Modified girth hitch.

Question 15

After connecting two caps in series circuit what step must be done next?

Answer 15

Check circuit for continuity.

Question 16

How many twists of electrical blasting Legwear will provide proper shunt?

Answer 16

Minimum of three twists.

Question 17

When connecting two pieces of det court together with tape what is the minimum length of surface area that the cord will connect with each other?

Answer 17

18”.

Question 18

To properly electrical duel prime explosive,the bomb Tech will have to?

Answer 18

Prime the explosive with two electric caps in parallel.

Question 19

What is the purpose of performing the close open close test of the firing wire after it is laid out?

Answer 19

To ensure there are no shorts or breaks in the wire.

Question 20

When lacing explosives what is the minimum length of the pigtails?

Answer 20

6 inches.

Question 21

What is one advantage of the M60 Igniter?

Answer 21

Is recockable and reloadable.

Question 22

What is one advantage of the M 81 igniter?

Answer 22

You can use shock tube and time fuse.

Question 23

What is the burntime per foot for civilian safety fuse?

Answer 23

30 to 45 seconds per foot.

Question 24

What is the burntime per foot for military time fuse?

Answer 24

Military time fuse burns 40 seconds per foot consistently.

Question 25

What does the single yellow checkmark on military time fuze signify?

Answer 25

18 inches.

Question 26

What is the first thing you do with the nonworking end of time fuse?

Answer 26

Tie a knot in the nonworking end of the time fuze. Cut and dispose of 6 inches of time fuse from the free end.

Question 27

How far up should you crimp blasting caps on time fuse and det cord?

Answer 27

1/8-1/4 inch from open end of cap.

Question 28

How long should you wait to clear a nonelectric misfire?

Answer 28

60 minutes plus burntime.

Question 29

What is the speed of primadet and shock tube?

Answer 29

6500 ft./s

Question 30

What are the two types of det cord systems?

Answer 30

Ring main and mainline.

Question 31

When attaching a branchline to a mainline what is the minimum angle of the branchline from the direction of the detonating wave?

Answer 31

90°.

Question 32

What is the first thing you do to a new roll of-time fuse before conducting a test burn?

Answer 32

Tie a knot on the nonworking end.

Question 33

What item of equipment would you use to check the continuity of an electrical firing system?

Answer 33

Galvanometer.

Question 34

The m81 one fuse igniter can be used to initiate what?

Answer 34

Safety fuse or shock tube.

Question 35

What is the minimum wait time prior to investigating a misfire involving a primadet if the shock tube initiated to the Cap, but the cap did not go off?

Answer 35

30 minutes.

Question 36

What is the frag pattern of a blasting cap?

Answer 36

360 degrees around the length and straight out the end.

Question 37

Firing wire must be

Answer 37

Min 500 feet and low resistance.