Terminology Flashcards
Pi
Ratio of a circle’s circumference to its diameter (3.14)
Circumference
Perimeter of a circle
Diameter
Length of a straight line through the center of an object
Radius
Half the distance of a diameter
Breaching radius
Used in conventional breaching. The total distance needed to breach through an object (AFTER THE ROUNDING RULES)
One Dimensional
Lacking depth, a line. Example: the horizon
Two Dimensional
Area with no depth only surface. Example: the top of a table
Three Dimensional
Area plus depth. Example: a brick
Area
Surface set in 2 dimensional. Length x Width
Volume
Amount of space occupied by 3 dimensional objects. Length x Width x Height
Square
Rectangle with equal four sides, no depth (2 dimensional)
Cube
Object with 6 sides has depth (3 dimensional)
Cylinder
A circle with depth. Example: a roll of quarters (3 dimensional)
Cone
A cylinder with a triangular top. Example: an ice cream cone
Square Root
A factor of a number that the root is itself times itself. Example: square root of 9=3. 3x3=9
Cube Root
A factor of a number when the root is itself times itself. Example: the cube root of 27=3. 3x3x3=27
Fraction
A numerical representation indicating a quotient of two numbers. Example: 1/2, 1/4. A portion, a fragment
Numerator
A part of a fraction above the line and signifies the number to be divided by the denominator
Denominator
A part of a fraction below the line and that functions as a divisor of the numerator
Decimal
Fragment or part of a whole number expressed in numbers by percentage. Example: .12, .32
Whole Number
Entity not a fragment
Deflagrate
Rapid burn
Detonate
Instantaneous or rapid change from a solid to a gaseous state
M183 Satchel Charge
Consists of 16 blocks M112 C-4 PKG. Wt. 20 lbs.
Block/Package/Stick
Single entity of explosive
Fuse Igniter
M60 used for time fuse only. M81 used for Shock Tube and time fuse
MDI
Modern Demolition Initiators
Non-Electric Firing System
Consists of an initiator (usually M60), time fuse (usually M700), and a non-electric blasting cap (usually M7)
Electric Firing System
Consists of power source (usually CD-450), firing wire, and an electric cap (usually M6)
Ring Main
Det cord tied onto itself to form a circle from which branch lines are tied into to set off multiple charges. Creates redundancy in the explosive train
Line Main
Det cord line that is used to set off multiple charges. Less time to set up vs. a ring main, but with no redundancy
Branch Line
Length of det cord used to prime an explosive charge and to tie the charge into a line/main
Priming Knot
A det cord knot used to take the place of a blasting cap to prime a charge. Example: Uli, Spiral, double overhand knot, four wrap, eight wrap, wiseman knot, det cord lace
Square Knot
Used to connect det cord together and tie in firing systems to a ring main
“Work Quickly”
Quickest method of constructing a charge and attacking a target. Most amount of explosives, conventional charge, external charge
“Work Efficiently/Effectively”
Most effective method of constructing a charge and attacking a target. Least amount of explosives, advanced charge, internal charge
NONEL
Shock tube is called “Nonel” by the civilian industry as it is short for non-electric
ECT
Explosive Cutting Tape. Brand name for Low Hazard Flexible Linear Shape Charge. Utilizes the Munroe effect to cut steel. Also utilized for door and wall breaching
