FLETC Written Exam 4 Questions and Answers 100% Verified.
Three Types of Explosions - ANSWER-Mechanical Chemical Nuclear High Explosive - ANSWER-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 - ANSWER-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 - ANSWER-Explosive designed to start fires or destroy sensitive equipment Detonation - ANSWER-Supersonic combustion that propagates through shock compression generating exothermic heat and an accompanying blast wave Deflagration - ANSWER-A subsonic combustion that propagates through thermal conductivity Effects of an Explosion - ANSWER-Thermal Blast Pressure Fragmentation Thermal Effect - ANSWER-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 - ANSWER-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
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