2.0 Flashcards
Explain the proper procedures for cleaning magazine floors from leakage stains of explosive material.
Clean in accordance with manufacturers instructions.
If the magazine placement is unacceptably limited by the presence of roads, occupied buildings, adjacent magazines or other factors; what steps can be taken to alleviate this?
Reduce H.E. in magazine, barricade, re-locate, or bury / excavate.
What ATF document details compliance procedures for storage of explosives?
ATF P5400.7
During normal business hours, ATF has the authority to conduct warrant-less inspections of ANY explosive magazine, inventory and records pertaining to explosives. (T or F)
False
Law enforcement explosive handlers are currently required to possess a permit to use explosives by Federal Law (T or F)
False
What are the Federal Guidelines for the storage of shock tube?
May be stored as a high or low explosive, when detonator is not attached to shock tube.
“ECT” is an appropriate explosive for breaching operations due to its high fragmentation hazard (T or F)
False
Explosives that are deteriorated or damaged are still useable? (T or F)
False
Why shouldn’t packaging of explosives be burned in a stove, fireplace, or other confined space?
The explosives (residue) could detonate / cause poisonous fumes / cause accidents.
Under what conditions should personnel attempt to fight fire after the fire comes in contact with stored explosives?
Never
Smoking around explosives and explosive transports are permitted if the smokers are careful (T or F)
False
ATF regulations provide an allowance for public safety explosive teams to store explosives overnight within unattended “official response” vehicles. (T or F)
True
Blasting caps and detonators can be in the same box or magazine with other explosives. (T or F)
False
The area surrounding an outside explosives magazine shall be kept clear of brush, dried leaves and grass and other combustible materials for a distance of _____.
50 feet
What could occur if a detonator / blasting cap is tampered with, cut open or roughly handled?
It could detonate.
To minimize injury should a detonation occur while handling, how should a blasting cap be held?
Away from the body
Define a “medium” and its use in breaching charge construction.
The ability to withstand detonation without disintegration and maintain its form to penetrate the objective. (Non compressible / HGH density material to create push effect)
Preparations of initiators should be performed at what minimum safe distance from other detonators / blasting caps and explosives?
25 feet
List five characteristics of explosives used for breaching…
- Readily available
- Relatively insensitive to shock, yet easy to detonate.
- Shattering effect
- High density
- Minimum toricity.
Commercial detonators vary in their net explosive weight, depending on the manufacturer and type, while military blasting caps have consistent NEW’s. (T or F)
True
When breaching framed or mass construction roofs, the charge should be placed at least ____ feet from the roof’s edge.
4 feet
Explain why breaching explosives are compared to TNT.
TNT is the standard for calculating structure material damage and personnel casualties resulting from detonation.
(TNT is the global standard all explosives are compared to in all T/B charts)
During training with explosives, who gives the approval or signal for the detonation of a charge?
RSO / Tactical Breacher
Reflective over-pressure can be a major hazard in both internal and external detonations (T or F)
True
“Outward Opening” doors open away from the entry team into the objective. (T or F)
False
Strength of reflected over-pressure, as well as duration and location of intersection points can be determined with the use of PSI calculations. (T or F)
False
After a detonation of an explosive charge, what should the area be searched for and why?
Any remaining explosives, explosive components, and unsafe conditions.
Who is responsible for conducting misfire procedures?
RSO / Tactical Breacher
During breaching training, what is the standard time frame to wait before inspecting a misfired explosive charge?
30 minutes.
ATF regulations exempt “public safety” explosive response teams from the requirement of maintaining an inventory on explosives stored in official vehicles, if parked within a secure government building. (T or F)
False
What explosives are used to produce a cutting effect?
- FLSC
2. ECT (low hazard flexible linear shape charge)
What explosives are used to produce a pushing effect?
- Det Cord
2. Explosive Sheet
List three examples of pushing “mediums” used…
- IV bags
- Poly
- Rubber
What type of explosives are used to produce a blasting effect?
- Explosive Sheet
- C-4 (Composition C4)
- Det Cord
Explain a situation where an oval configuration would be a desirable charge selection on a door instead of a strip configuration.
Significantly barricaded door.
List examples of specific breach points on an objective which detailed information is collected on.
- Doors
- Door frames, hinges and locks
- Windows and window frames
- exterior / interior walls
- Roofs and Floors
What is the purpose of structural analysis?
To be able to identify indicators that show the type of construction, evaluation of weak and strong points, possible floor plan layout.
Explain how to determine if a door opens in or out.
Out = hinges are visible
In = Hinges flush or not visible.
The following are all considerations when developing a plan for breaching windows (T or F):
Residential structures have blinds and curtains that must be dealt with.
Residential windows usually break in large glass shards that create dangerous conditions for team personnel.
Small, opaque windows usually indicate a bathroom.
Large patio doors or picture windows are usually tempered glass.
True
List 5 problems associated with breaching walls.
- Electrical wires, plumbing, natural gas lines.
- Air gaps in wall.
- Re bar
- Floor and interior walls, furniture on opposite side.
- Breathing and vision hazards.
An explosive charge consists of 6 feet of 50gr/ft, one 20 gram booster, and a strip of C-4 explosive sheet 6 feet long by 1 inch wide. (All explosives are PETN based / Do not include TFA).
A) What is NEW in pounds (TNT)?
B) What is the MSD for team personnel?
C) At what distance will wood frame structure wall crack?
D) Out to what distance with auto safety glass break?
E) At what distance will standard glass break?
A) 1.20
B) 19 feet
C) 48 feet
D) 16 feet
E) 80 feet
An explosive charge consists of 28 feet of 50gr/ft det cord and 18 squares of C-6 explosive sheet 3” by 3”.
A) What is the NEW in pound TNT?
B) What is the MSD for team personnel?
C) At what distance will asbestos shingles crack?
D) What distance will concrete block shatter?
E) What distance will standard glass break?
A) 3.89
B) 29 feet
C) 71 feet
D) 71 feet
E) 118 feet.
Which of the following may be acceptable means of explosive disposal? (if certain conditions permit, following all compliance requirements, and depending on the material)
A) Buried in a remote location
B) Spread out and burned
C) Returned to supplier
D) detonated by other explosives.
Prior to purchasing explosives, what minimum requirements must an agency meet?
ATF inspected storage facility, county permit if required.
What does the ATF explosive law and regulations stipulate as conditions for law enforcement agencies indoor storage of explosives?
ATF 555.208
Construction of a type 2 magazine uninhabited structure, fire/theft resistant room/area. Wood lined 0.12 gauge metal box +2 pad locks.
1 Mag=50lbs of H.E.
1 Mag= 5,000 detonators.
What are the ATF’s limits on explosive materials stored on “Official Response” vehicle which are unattended or parked at unsecured areas? and what are the “security features” required for that vehicle?
2.5 pounds / 20 detonators
Must have an additional security system / not parked in garage, alarm = lo jack.
