Explosives L

Which type of explosive is classified into two groups, primary and secondary?

• low explosives

          

• medium explosives

           

• high explosives

      

• extreme explosives

           

Low explosives decompose at rates that vary up to _______.

• 1,000 meters per second

           

• 1,000 meters per hour

             

• 7,000 miles per hour

     

• 7,000 meters per second

In recent years, dynamite has been replaced commercially by _______.

 

• PETN

           

• nitroglycerin

             

• TATP

        

• ammonium nitrate-based explosives

The single most important step in the detection and analysis of explosive residues is ______.

• the collection of appropriate samples from the explosion scene

         

• the determination of whether it is a low or a high explosive

           

• the creation of a chain-of-custody form

           

• locating the ignition source

A _________ is a device used to create an explosion needed to ignite a high explosive.

• safety fuse

          

• PETN

• detonator

     

• firing pin

A cord containing a core of black powder, used to carry a flame at a uniform rate to an explosive charge is called a _________.

• TLC

       

• safety fuse

        

• PETN

            

• detonator

After bomb-scene debris has been examined microscopically, the next step is to ______.

• examine the explosive using spectrophotometry

          

• use X-ray diffraction to “fingerprint” the organic explosive

            

• rinse the debris with acetone to separate the debris from explosive material

        

• view the detonating mechanism with a low-power stereoscopic microscope

What produces the violent physical disruption associated with an explosion?

• The violent physical disruption associated with an explosion is caused by the sudden buildup of expanding gas pressure at the origin of the explosion.

• The violent physical disruption associated with an explosion is caused by the sudden heat imploding at the

  origin of the explosion.

• The violent physical disruption associated with an explosion is not caused by the slow buildup of expanding gas pressure at the origin of the explosion.

• The violent physical disruption associated with an explosion is caused by the sudden buildup of expanding gas pressure at the extremities of the explosion towards the origin.