C&P Principles

Question 1

During __________ HE violently change to a gaseous form instantaneously and release pressure and heat.

Low Explosives__________ which is a rapid burn.

Answer 1

Detonation

Deflagrate

Question 2

3 types of explosives

Answer 2

Primary- M7, M6 blasting caps

Secondary- TNT, M112, DetCord, shocktube

Tertiary- ammonium nitrate

Question 3

RE factors

Answer 3

Ammonium nitrate-.42
M1D- .92
TNT- 1
C2- 1.14
M186- 1.14
M112- 1.34
Det Cord- 1.66

Question 4

What are the desired demolition effects?

Answer 4

Deformation/cratering

Spalling

Radial cracking

Question 5

What is cratering?

Answer 5

Surface area of an object in direct contact with a charge is crumbled, cratered, depressed or indented from compressive shockwave.

Question 6

What is spalling?

Answer 6

Shock waves move through target and chip away at tensile strength.

Question 7

What is radial cracking?

Answer 7

Pressure load on the target will crack and displace material beyond the crater and spall.

Question 8

Charge placement facts

Answer 8

Charge to target contact

Internal- more efficient= less explosives

External- more quick= more explosives

Question 9

What are the components of an electric firing system?

Answer 9

CD450-4J- blasting machine

RL39A- Firing wire

M6- electronic blasting cap

Question 10

What may cause an M6 blasting cap to prematurely detonate?

Answer 10

Radios
Radars
Tv signals
Lightning 
Static electricity

Question 11

MSD for charges less than 27 lbs?

More than 27, but less than 500 lbs?

Answer 11

300 meters

Refer to table 6-2

Question 12

Vehicles transporting explosives should have at least________.

Vehicles should store initiators in_______.

Storing ammo rules?

Answer 12

2 class B/C fire extinguishers

A separate vehicle or in the cab of truck in approved ammo container.

No less than 3” off ground
No less than 18” from top of stack to ceiling
No more than 500 lbs per stack
No less than 140’ apart