Quiz 1 Flashcards
Weight, RE and dimension of M1 dynamite
.5lbs (stick)
.92
1.25x8”
RE and weight of TNT
1lbs block
1.00
Characteristics of C2 primasheet
.083 x 10"x38' 20lbs roll 2 rolls per box / 40lbs RE: 1.14 NEW: .5 per 1 ft
Characteristics of M186
.75x 3"x 50' 25lbs roll 3 rolls per box / 80lbs RE: 1.14 NEW: .5 per 1ft
Characteristics of M112 block demolition charge
1”x2”x10”
1.125lbs
30 per box /40lbs
RE: 1.34
How many grains per foot is Det cord
54
What are the types of block demolition charges
TNT
M112
M1 DYNAMITE
40lb CRSTERING CHARGE
Is ammonium nitrate hygroscopic?
Yes absorbs humidity
What is M700
Time blasting fuse
How can you tell the difference between time fuse and DET cord?
Time fuse- dark green plastic with yellow band
- has black powder core
DET CORD- white powder, green outer cover w/o markings
How far can moisture penetrate DRT cord
6in
What blasting cap would you use for an electrical firing system
M6
What blasting cap would you use for a non-electrical firing system?
M7
How many amps/ volts are needed to set of a M6 blasting cap?
1.5 amps/ 3 volts
What are the different parts of the M2 crumpets
Top- crimping
Bottom- cutting
Handle- poking holes
How long must you wait for a non- electrical misfire? Electrical?
30 min non-electrical
No wait time for electrical
What can cause premature detonation of electrical blasting caps?
Radio, radar, tv signals, lightning, static electricity
How do you find Det cord net explosive weight?
Length in ft54RE=total grains of explosive
Grains/7000=net explosive weight in lbs
What is the minimum safe distances for charges less than 27lbs
300meters
How do you calculate safe distance
Meters= 100x cubed root of NEW
What type and how many fire extinguisher guishers should the truck be equipped with?
2 B/C fire extinguishers
Where should blasting caps/ initiators be transported?
In another vehicle away from explosives. If not possible in cab of truck in approved ammunition container.
How should you store explosives?
No less than 3in between bottom of floor
No less than 18in between top of the stack and the cover
How are magazines placed?
Safety
Accessibility
Dryness
Drainage
How much should magazines weigh?
No more than 500lbs per pile
How far apart should magazines be placed?
No less than 140ft
What are the different detonation effects
Deformation
Spalling
Radial cracking
To transmit the greatest shock the charge must:
Charge to target contact is crucial
What type of charge is efficient? Quicker?
Internal
External
What is the 6 step problem solving format
1) all critical data
2) calculate for TNT (d^2)/40
3) divide by RE
4) divide by package size and round up
5) multiply by number of targets
6) total quantity of explosive
What are the components of a non electrical initiating set?
Fuse igniter
M700 time fuse or equivalent
M7 nonelectrical bladtin cap
Draw a nonelectrical initiating set
M60—-M700-M7 blasting cap
How do you calculate burn rate
1- tie square not in non working end 2- cut 6 in off working end 3 cut 3' of working end 4- conduct test burn 5- determine sesired burn time 6- take desired burn time in seconds/ burn time of 3' test
What are the components of an electrical initiating set
Power source
Firing wire
M6 electrical blasting cap
Characteristics of Det cord
12.8lbs per 1000ft
Re: 1.66
