CALC IN PLACE TRIVIA Flashcards
What is the Burn Rate of M700 Time Fuse ?
35 to 45 seconds per foot.
What should you do before unshunting wires ?
Ground yourself.
By placing the back side of your hand on the ground.
What is an M9 ?
Bunch Block
- Can connect up to five M11 Shock Tubes
- Used to connect M11/M14 cap to ring/line main.
How much HMX and AL Powder is in MDI/Shock Tube ?
- 5 % HMX
10. 5 % AL Powder
What is an M11 ?
30 foot Shock tube
- Factory crimped High-Strength Blasting cap
- J-hook to attach to DET Cord.
How many blasting caps can an M152 set off ?
24 caps
What kind of caps does an M-19 have ?
High Det.
Designed for urban ops (Breaching)
What is the minimum missile hazard distance for charges less than 27 pounds ?
300 meters
What could cause Premature Detonation of Electric blasting caps ?
Induced by Radio, TV signals, Lighting, Static electricity
How many blasting caps can a CD 450 set off ?
70 blasting caps
Where do you place an Initiating charge ?
On top of the pile to prevent throwing unexploded charges into the air
What is the minimum pounds for an initiating charge for packed and unpacked explosives per number of pounds to be destroyed ?
Packed: 2 pounds per 100 pound
Unpacked: 1 pound per 100 pounds
Stacked explosives in a pile should not exceed how many pounds ?
2,000 pounds
What is the most preferred method for destruction of explosives ?
Burning is the preferred method
What is the Acronym that determines Permanent Magazine location
Safety Accessibility Dryness Drainage *Safety is the most important factor*
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 ?
500 pounds
140 feet
How many inches of dunnage between the bottom of the stack and the earth’s floor ?
3 inches
Air space of not less than how many inches between the top of the temporary stack and the cover ?
18 inches
What is the distance electric blasting caps should be kept for energized power lines ?
155 meters
How should blasting caps and explosives be transported ?
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.
What is an M7 ?
Nonelectric Blasting Cap
What is an M6 ?
Electric Blasting Cap
What are M60’s and M81’s ?
Fuse Igniter
Blasting caps contain how much HE ?
13.5 grains
What is the only Authorized splice used on an electric firing system ?
Western union “ Pig Tail “
Charges are placed to provide what ?
Maximum effectiveness
What are Critical factors in charge calculations ?
Charge Placement
Method of initiation
Method of tamping
If a non electric misfire occurs what should you do ?
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
What are the three Destructive effects ?
Deformation
Radial cracking
Spalling
MDI Shock tube utilizes what to imitate blasting caps ?
Dust explosion Phenomenon
what are the 2 type of electric firing systems ?
Common
Leap Frog
Ammonium Nitrate is best used for ?
Cratering and ditching because of it’s low RE factor
RE 0.42
What increases the effectiveness of an external charge ?
Tamping
External charges are _______ ?
Internal charges are _______?
- Tamped
- Stemmed
The optimum ratio of charge thickness to width for steel is less than 3 inches is ?
1 to 3
The optimum ratio of charge thickness to width for reinforced concrete 1 to 7 feet thick ?
1 to 6 to about 1 to 14
What is an M-51 ?
Blasting Cap test set
