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CALC IN PLACE > CALC IN PLACE TRIVIA > Flashcards

CALC IN PLACE TRIVIA Flashcards

1
Q

What is the Burn Rate of M700 Time Fuse ?

A

35 to 45 seconds per foot.

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2
Q

What should you do before unshunting wires ?

A

Ground yourself.

By placing the back side of your hand on the ground.

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3
Q

What is an M9 ?

A

Bunch Block

  • Can connect up to five M11 Shock Tubes
  • Used to connect M11/M14 cap to ring/line main.
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4
Q

How much HMX and AL Powder is in MDI/Shock Tube ?

A
  1. 5 % HMX

10. 5 % AL Powder

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5
Q

What is an M11 ?

A

30 foot Shock tube

  • Factory crimped High-Strength Blasting cap
  • J-hook to attach to DET Cord.
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6
Q

How many blasting caps can an M152 set off ?

A

24 caps

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7
Q

What kind of caps does an M-19 have ?

A

High Det.

Designed for urban ops (Breaching)

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8
Q

What is the minimum missile hazard distance for charges less than 27 pounds ?

A

300 meters

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9
Q

What could cause Premature Detonation of Electric blasting caps ?

A

Induced by Radio, TV signals, Lighting, Static electricity

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10
Q

How many blasting caps can a CD 450 set off ?

A

70 blasting caps

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11
Q

Where do you place an Initiating charge ?

A

On top of the pile to prevent throwing unexploded charges into the air

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12
Q

What is the minimum pounds for an initiating charge for packed and unpacked explosives per number of pounds to be destroyed ?

A

Packed: 2 pounds per 100 pound
Unpacked: 1 pound per 100 pounds

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13
Q

Stacked explosives in a pile should not exceed how many pounds ?

A

2,000 pounds

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14
Q

What is the most preferred method for destruction of explosives ?

A

Burning is the preferred method

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15
Q

What is the Acronym that determines Permanent Magazine location

A 
Safety
Accessibility
Dryness 
Drainage
*Safety is the most important factor*
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16
Q

Piles of Explosives Temporary stored in the open should not weigh more that how many pounds and should not be place no less than how many feet apart ?

A

500 pounds

140 feet

17
Q

How many inches of dunnage between the bottom of the stack and the earth’s floor ?

A

3 inches

18
Q

Air space of not less than how many inches between the top of the temporary stack and the cover ?

A

18 inches

19
Q

What is the distance electric blasting caps should be kept for energized power lines ?

A

155 meters

20
Q

How should blasting caps and explosives be transported ?

A

IF possible, Blasting caps / Initiators should not be transported with other explosives in the vehicle

If not possible, Pace caps in cab or trailer within a closed ammo can. Explosives stored in the cargo or bed area.

21
Q

What is an M7 ?

A

Nonelectric Blasting Cap

22
Q

What is an M6 ?

A

Electric Blasting Cap

23
Q

What are M60’s and M81’s ?

A

Fuse Igniter

24
Q

Blasting caps contain how much HE ?

A

13.5 grains

25
Q

What is the only Authorized splice used on an electric firing system ?

A

Western union “ Pig Tail “

26
Q

Charges are placed to provide what ?

A

Maximum effectiveness

27
Q

What are Critical factors in charge calculations ?

A

Charge Placement
Method of initiation
Method of tamping

28
Q

If a non electric misfire occurs what should you do ?

A

Wait 60 minutes

  • Untamped: Place 1 pound charge on undetonated charge.
  • Tamped less than 1 foot: Place 1 pound charge over undetonated charge.
  • Tamped deeper than 1 foot: Dig to within 1 foot and place 2 pound charge
29
Q

What are the three Destructive effects ?

A

Deformation
Radial cracking
Spalling

30
Q

MDI Shock tube utilizes what to imitate blasting caps ?

A

Dust explosion Phenomenon

31
Q

what are the 2 type of electric firing systems ?

A

Common

Leap Frog

32
Q

Ammonium Nitrate is best used for ?

A

Cratering and ditching because of it’s low RE factor

RE 0.42

33
Q

What increases the effectiveness of an external charge ?

A

Tamping

34
Q

External charges are _______ ?

Internal charges are _______?

A
  • Tamped

- Stemmed

35
Q

The optimum ratio of charge thickness to width for steel is less than 3 inches is ?

A

1 to 3

36
Q

The optimum ratio of charge thickness to width for reinforced concrete 1 to 7 feet thick ?

A

1 to 6 to about 1 to 14

37
Q

What is an M-51 ?

A

Blasting Cap test set

CALC IN PLACE (10 decks)

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