Test 1b Flashcards
What unsafe condition could result if you detonate explosives in a lab?
Structural damage
What explosive is most commonly found in improvised detonators?
TATP
What is added to acetone and hydrogen peroxide to make TATP?
Sulfuric Acid
What makes up HMTD ?
Citric acid, hexamine, hydrogen peroxide
An IED circuit consists of what?
Power source, conductor, initiator, switch
What is the minimum wait for electrical cap misfire ?
30 min
What’s the appropriate distance to place crimp on non-electric (time fuse) cap?
1/8”-1/4”
When is it allowable to take a quick peak on a suspected package?
A quick peak is never the best course of action.
What priority facilitates the evacuation of the public prior to attempting rsp?
Public safety
When is it allowable to doff the bomb suit down range?
When the suit will not allow the dexterity needed to complete the task
What are the makeup for black powder?
Potassium nitrate, sulfur, charcoal
What makes anfo?
Ammonium nitrate, fuel oil
How are caps wired for proper dual electric priming?
Two electric caps wired in parallel
What is an airblast?
Shockwave or transient pressure pulse that propagates through the air at supersonic velocity
What are secondary explosives?
Explosives that normally require initiation by detonation of initial primary explosive.
What speed does hmx in shock tube detonate at?
6500 fps
What do blasting agents need to be detonated?
A booster
What explosive is generally safe when wet but as dangerous as ever when dry again?
Black powder
What kind of explosive is PETN
Monomolecular
What is a common explosive with an acetone as a precursor?
TATP (triacetonetriperoxide)
What common source can Americium 241 be found in?
Smoke detector
Who should bomb squads contact when encountering WMD threats?
FBI
A build up of pressure which overcomes the strength of the container
Mechanical explosion
Deflagration
Rapid combustion moving through an explosive material at a velocity lower than speed of sound
High explosive
Explosive characterized by a very high rate of reaction
High order detonation
Detonation which results in the consumption of all the explosives in the charge
Who must be on scene when EOD arrives?
A Civil Safety or Law Enforcement Official
What conclusion can you make about the color of military ordnance found in the wild?
Color code is not an adequate identification for ordnance outside military control
What can’t bomb techs do during WMD Chemical Threat?
Cannot delegate bomb squad duties to Hazmat Teams
What is an important aspect regarding biological threats ?
They are microscopic and their presence is not indicated by appearance
What is average background radiation for an individual?
620mRem per year
How are transistors used in IED’s?
As an Electronic switch
How are AIR (active infrared) devices activated?
Interrupting the beam
What kind of circuit involves a firing battery, receiver battery, antenna, servo, micro switch, and initiator?
Remote control circuit
Define mechanical action fuze
Requires physical action or force for the mechanism to function
Which manually actuated fuse is the most dangerous to a bomb tech?
Anti-disturbance
What is a common safe arm for a circuit containing a trembler or vibratory switch?
Clock or timer
A circuit draws 3A through 8 ohms, what’s the supplied volts
24
Firing switches and arming switches in an IED circuit are normally wired how?
Series parallel
What is required to make an IED circuit?
Power, conductor, switch, initiator
What can cause a collapsing circuit to function?
Battery decay, cut wrong wire, disturbance
When should you wear a bomb suit?
Every approach until all explosive hazards are dealt with
If voltage remains constant and resistance is increased, what does current do?
Decreases
What term defines current flow in a circuit?
Amperage
What term is the measure of resistance?
Ohms
Switches perform what purpose in a circuit?
Open or close a circuit
A 12 volt circuit passes through 2 ohms of resistance, what’s the current?
6 amps
What occurs when power button is pressed on the bomb suit arm controller?
Link is established with the helmet/controller and green light turns on
