Quiz: Firearm injuries

* (Flame and, smoke causing burning and blackening till (one correct answer .2

A m in long weapons; and 25 cm in. short weapons 1 .25 • B m in long weapons; and 12.5 cm in. short weapons 25 C cm in long weapons; and 12 cm in. short weapons 25 D cm in long weapons; and 5 cm in. short weapons 50

Functions (aim) of riflings are all .3 :Except

A .To give it longer range and more power of penetration B 'Z ."To leave on the surface of the fired bullet "rifling marks • C .To diminish the resistance of gravity to the bullet D .To diminish the resistance of air to the bullet

Regarding the Ghaffir guns all are true .4 :Except

A .External wad is present in Greener B .Their cartridges are made wholly of brass C .Greener has the widest bore D .Schneider has 7 semicubical slugs •

Regarding black powder all are true .5 :Except

A .(It consists of nitrocellulose (1 5%),sulphur (10%) and potassium nitrate (75% B Black powder is partly burnt, so that blackening and tattooing are observed around the .(injury clearly (in near firing C Ignition of one volume of black powder produces 300 volume of gases D After ignition, alkaline residue is left on the inside of the barrel

Regarding smokeless powder all are true .6 :Except

A Smokeless powder is nearly completely burnt leading to less apparent blackening and .tattooing B .It consists of nitro cellulose and nitroglycerine C It is two times stronger than black powder because ignition of one volume produces • — 600 volum D Its ignition leaves neutral residue formed of nitrites and nitrates

All are true about external wad .7 :Except

A Distance of firing can be estimated from its site, whether inside the body (within 1 .(meter), or just hits the body (1 to 3 meters B X .Its diameter is equal to the diameter of inner side of the barrel • C -It acts as a piston driving out shots D Presence of the external wad inside the body or at the scene of a crime denotes that the .wound is a firearm injury

* Black powder causes .8

A .Tattooing of exit B v Dense circle of soot around the inlet • C Dense black circle of soot around the exit D .Burning of exit

* Powder marks at inlet means .9

A Tattooing of inlet only B Burning of inlet only C Blackening of inlet only D Burning and blackening; and tattooing of inlet •

All are true about external wad .10 :Except

A Presence of the external wad inside the body or at the scene of a crime denotes that the .wound is a firearm injury B Distance of firing can be estimated from its site, whether inside the body (within 1 .(meter), or just hits the body (1 to 1 0 meters C X .Its diameter is equal to the diameter of inner side of the barrel • D .It is absent in Remington & Schneider guns

All are true about shots .1 1 :Except

A .Their presence denotes that the wound is a firearm injury B .They give an idea about the type of the weapon used C .They give an idea about the caliber of the gun • D .They give an idea about the distance of firing

Regarding "primer" all are true .1 2 :Except

A .Its other name is percussion cap B .It contains paste formed of three substances C x/ .It contains powdered glass as a source of 02 D X .It contains antimony sulphide as high inflammable substance •

Typical inlet is characterized by all the followings .1 3 :Except

A .Loss of substance B .Small size C .Abrasion ring D .Regular everted edges

In homicidal firearm injuries all the followings are true .14 :Except

A .Signs of resistance B .History of threatening by enemy C .Absent cadaveric spasm D .Suicidal note

* :(AII of the following are true as regard fabricated firearm Wounds (except .1 5

A .Superficial B .Not covered by clothes C .Presence of powder marks in spite of the wound is superficial D .Usually fatal

The firearm injury is characterized by all the followings .1 6 :Except

A .Powder marks B .Inlet & exit C .Loss of substance D .Bridging

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