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HDS Test 3 > Demolition Procedures > Flashcards

Demolition Procedures Flashcards

1
Q

How is a blasting machine rated?

A

Rated for caps in series.

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2
Q

What is the difference between military and civilian blasting caps?

A

Military: More Powerful but Less Sensitive.

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3
Q

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

A

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

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4
Q

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

A

30 minutes.

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5
Q

What is one advantage of an electrical circuit for demolition?

A

More control over your shot.

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6
Q

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

A

At least 25 feet away from explosives until final Priming.

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7
Q

How many holes are necessary for a lacing technique?

A

Four.

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8
Q

How many wraps for a hasty whip minimum?

A

Four.

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9
Q

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

A

Square knot or modified girth hitch.

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10
Q

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

A

Double overhand or ULI knot.

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11
Q

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

A

Square knot.

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12
Q

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

A

Lace or Hasty whip.

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13
Q

What would you use a galvanometer for?

A

Checking firing wire and electric blasting caps for continuity.

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14
Q

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

A

Modified girth hitch.

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15
Q

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

A

Check circuit for continuity.

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16
Q

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

A

Minimum of three twists.

17
Q

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?

A

18”.

18
Q

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

A

Prime the explosive with two electric caps in parallel.

19
Q

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

A

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

20
Q

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

A

6 inches.

21
Q

What is one advantage of the M60 Igniter?

A

Is recockable and reloadable.

22
Q

What is one advantage of the M 81 igniter?

A

You can use shock tube and time fuse.

23
Q

What is the burntime per foot for civilian safety fuse?

A

30 to 45 seconds per foot.

24
Q

What is the burntime per foot for military time fuse?

A

Military time fuse burns 40 seconds per foot consistently.

25
Q

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

A

18 inches.

26
Q

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

A

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

27
Q

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

A

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

28
Q

How long should you wait to clear a nonelectric misfire?

A

60 minutes plus burntime.

29
Q

What is the speed of primadet and shock tube?

A

6500 ft./s

30
Q

What are the two types of det cord systems?

A

Ring main and mainline.

31
Q

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

A

90°.

32
Q

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

A

Tie a knot on the nonworking end.

33
Q

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

A

Galvanometer.

34
Q

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

A

Safety fuse or shock tube.

35
Q

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?

A

30 minutes.

36
Q

What is the frag pattern of a blasting cap?

A

360 degrees around the length and straight out the end.

37
Q

Firing wire must be

A

Min 500 feet and low resistance.

HDS Test 3 (7 decks)

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