FLETC WRITTEN EXAM
FLETC WRITTEN EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
Three Types of Explosions - ACCURATE ANSWERS✔✔ Mechanical
Chemical
Nuclear
High Explosive - ACCURATE ANSWERS✔✔ Explosive which
normally requires a blasting cap for initiation and once initiated
produces a supersonic detonation with a shattering or brisant effect
Detonate without confinement, doesn't need container
,Low Explosive - ACCURATE ANSWERS✔✔ Explosive, which when
unconfined, responds to initiation by deflagration or burning and
produces a pushing effect
Transitions from deflagration to detonation when confined
Incendiary Explosive - ACCURATE ANSWERS✔✔ Explosive
designed to start fires or destroy sensitive equipment
Detonation - ACCURATE ANSWERS✔✔ Supersonic combustion that
propagates through shock compression generating exothermic heat and
an accompanying blast wave
Deflagration - ACCURATE ANSWERS✔✔ A subsonic combustion that
propagates through thermal conductivity
Effects of an Explosion - ACCURATE ANSWERS✔✔ Thermal
Blast Pressure
Fragmentation
Thermal Effect - ACCURATE ANSWERS✔✔ Usually seen as a bright
flash or fireball at the moment of detonation
May cause localized ignition of highly combustible materials
,Generally least damaging of the three effects
Blast Pressure Effect - ACCURATE ANSWERS✔✔ Very hot gasses
(between 3,000 and 7,000 degrees Fahrenheit) expand out from the point
of detonation at supersonic velocities (up to 20,000 mph)
The further the pressure wave travels, the less power it has
Most powerful and destructive/deadly of the effects
When taking place in a confined area, it can amplify the original blast
wave
Two Phases of Blast Pressure - ACCURATE ANSWERS✔✔ Positive
Phase
Negative Phase
Positive Phase of Blast Pressure - ACCURATE ANSWERS✔✔ Pressure
wave moving outward from the point of detonation
Negative Phase of Blast Pressure - ACCURATE ANSWERS✔✔ Partial
vacuum is created near the epicenter due to the outward movement of air
and the consumption of oxygen from the combustion process
, 4 Types of Injuries Sustained During a Blast - ACCURATE
ANSWERS✔✔ Primary Blast Injury
Secondary Blast Injury
Tertiary Blast Injury
Quaternary Injury
Primary Blast Injury - ACCURATE ANSWERS✔✔ Caused by direct
effects of blast
Secondary Blast Injury - ACCURATE ANSWERS✔✔ Caused by
propelled fragmentation (most deadly)
Tertiary Blast Injury - ACCURATE ANSWERS✔✔ Occurs when a
casualty's body is propelled by the blast against the ground or stationary
objects
Quaternary Injury - ACCURATE ANSWERS✔✔ Any other injuries
(burns and crush injuries)
Three Mechanisms of Primary Blast Injury - ACCURATE
ANSWERS✔✔ Implosion
Spalling
Inertial Effects
FLETC WRITTEN EXAM WITH GUARANTEED ACCURATE ANSWERS |VERIFIED
Three Types of Explosions - ACCURATE ANSWERS✔✔ Mechanical
Chemical
Nuclear
High Explosive - ACCURATE ANSWERS✔✔ Explosive which
normally requires a blasting cap for initiation and once initiated
produces a supersonic detonation with a shattering or brisant effect
Detonate without confinement, doesn't need container
,Low Explosive - ACCURATE ANSWERS✔✔ Explosive, which when
unconfined, responds to initiation by deflagration or burning and
produces a pushing effect
Transitions from deflagration to detonation when confined
Incendiary Explosive - ACCURATE ANSWERS✔✔ Explosive
designed to start fires or destroy sensitive equipment
Detonation - ACCURATE ANSWERS✔✔ Supersonic combustion that
propagates through shock compression generating exothermic heat and
an accompanying blast wave
Deflagration - ACCURATE ANSWERS✔✔ A subsonic combustion that
propagates through thermal conductivity
Effects of an Explosion - ACCURATE ANSWERS✔✔ Thermal
Blast Pressure
Fragmentation
Thermal Effect - ACCURATE ANSWERS✔✔ Usually seen as a bright
flash or fireball at the moment of detonation
May cause localized ignition of highly combustible materials
,Generally least damaging of the three effects
Blast Pressure Effect - ACCURATE ANSWERS✔✔ Very hot gasses
(between 3,000 and 7,000 degrees Fahrenheit) expand out from the point
of detonation at supersonic velocities (up to 20,000 mph)
The further the pressure wave travels, the less power it has
Most powerful and destructive/deadly of the effects
When taking place in a confined area, it can amplify the original blast
wave
Two Phases of Blast Pressure - ACCURATE ANSWERS✔✔ Positive
Phase
Negative Phase
Positive Phase of Blast Pressure - ACCURATE ANSWERS✔✔ Pressure
wave moving outward from the point of detonation
Negative Phase of Blast Pressure - ACCURATE ANSWERS✔✔ Partial
vacuum is created near the epicenter due to the outward movement of air
and the consumption of oxygen from the combustion process
, 4 Types of Injuries Sustained During a Blast - ACCURATE
ANSWERS✔✔ Primary Blast Injury
Secondary Blast Injury
Tertiary Blast Injury
Quaternary Injury
Primary Blast Injury - ACCURATE ANSWERS✔✔ Caused by direct
effects of blast
Secondary Blast Injury - ACCURATE ANSWERS✔✔ Caused by
propelled fragmentation (most deadly)
Tertiary Blast Injury - ACCURATE ANSWERS✔✔ Occurs when a
casualty's body is propelled by the blast against the ground or stationary
objects
Quaternary Injury - ACCURATE ANSWERS✔✔ Any other injuries
(burns and crush injuries)
Three Mechanisms of Primary Blast Injury - ACCURATE
ANSWERS✔✔ Implosion
Spalling
Inertial Effects
