Exp

Question 1

Definition of explosion

Answer 1

sudden release of potential energy producing a localized increase in pressure

Question 2

4 things to be determined in an investigation of death or physical injuries produced by an explosion

Answer 2

1. What exploded
2. What caused it to exploded
3. How did the explosion produce injury?
4. How was it initiated

Question 3

4 types of explosion based on the source of energy

Answer 3

1. Mechanical (hydraulic explosion)
2. Electrical explosion
3. Nuclear explosion (e.g. Atomic explosion)
4. Chemical explosion

Question 4

Type of explosion that occurs when the pressure inside the container exceeds its structural strength

Answer 4

Mechanical (hydraulic) explosion

Question 5

Type of explosion that occurs when a chemical reaction produces heat and gas at a rate faster than the surroundings can dissipate

Answer 5

Chemical explosion

Question 6

Explosion from release of a significant amount of energy by fusion or fission

Answer 6

nuclear explosion

Question 7

uncontrolled release of energy from atomic nuclei

Answer 7

atomic explosion

Question 8

Types of chemical explosion (2)

Answer 8

Diffused reactant explosion

Condensed reactant explosion

Question 9

Condensed reactant explosives may be classified as (2)

Answer 9

Low order explosive (deflagrating explosive)

High order explosive

Question 10

Type of explosion that rely on burning and confinement to produce explosion

Answer 10

low order explosive (deflagrating explosive)

Question 11

Kind of explosive that detonates

Answer 11

High order explosive

Question 12

Chemical process which results in the extremely rapid decomposition of nitrogenous compounds

Answer 12

Detonation

Question 13

Type of explosive that will not detonate unless they are subjected to detonation. This includes dynamite (nitroglycerine made stable by clay absorption)

Answer 13

Stable High Order explosive

Question 14

Types of High order explosive

Answer 14

1. Stable High order explosive

2. Unstable High order explosive

Question 15

Trinitrobbenzene (picric acid)
fulminate of mercury
lead
antimony or bismuth and nitroglycerine

are examples of what type of explosive

Answer 15

Unstable high order explosive

Question 16

Triggers of unstable high order explosive (4)

Answer 16

heat
flame
spark
percussion

Question 17

Complete disruption or fragmentation of the body could be expected if the victim is most likely

Answer 17

in contact with the explosive

Question 18

True about effects of blast wave EXCEPT

a. the impact of high pressured wave can knock down the person
b. petechial hemorrhages on the mucosa of the trachea is due to the entry of high pressured wave along the trachea
c. The ear is the most vulnerable to the blast
d. NOTA, all are true

Answer 18

B;

” In the respiratory organ, the bronchus may be lacerated or the mucosa of the trachea ay develop petechial hemorrhages. This effect is not due to the entry of the high pressured wave along the trachea and bronchi but by its passing directly on the body wall. “

Question 19

Death or physical injuries due to detonation of high explosives may be due to the ff (5)

Answer 19

PI BAD
Poisoning by inhalation of gases
Injuries from falling debris

Burns from the flame or heated gas
Asphyxia due to lack of oxygen
Direct injury by the flying missiles

Question 20

Explosives that may cause shrapnel wound (4)

Answer 20

Grenade
Bomb
Mines
Exploding missiles

Question 21

Identification of the site of explosion and collection of evidences (3)

Answer 21

Crater
Scrapings
Fragments

Question 22

Color spot test reagents (3)

Answer 22

Griess reagent
Diphenlyamine Reagent
Alcoholic KOH Reagent

Question 23

Other tests on extract (3)

Answer 23

Infra-red spectrophotometry
X-ray diffraction
Gas chromatographic analysis

Question 24

Place of atomic explosion(3)

Answer 24

Aerial explosion
Ground
Subamarine

Question 25

Rays emitted by radioactive substances during explosion (4)

Answer 25

Alpha Beta Gamma Neutron

Question 26

Composed of positively charged helium, having a high linear energy transfer with a poor penetrating power that can be stopped by a sheet of paper

Answer 26

Alpha rays

Question 27

Uncharged and composed of highly penetrating particles and basic element in nuclei of atoms

Answer 27

Neutron Rays

Question 28

Composed of short rays with high energy and greater penetrating power and like neutrons it extends a significant distance and causes much damage to the human body

Answer 28

Gamma rays

Question 29

Composed of positively or negatively charged electrons with a higher penetrating power than the alpha rays but the ionizing power is much less. The electrons are travelling at a very high velocity and in some cases approaching the speed of light.

Answer 29

Beta rays

Question 30

Characteristics of nuclear bomb explosion that distinguishes it from conventional High Explosive bomb explosion (3)

Answer 30

1. Many thousand times as powerful as a high conventional bomb explosion 2. a large proportion of its energy is emitted as thermal radiation 3. The explosion emits a highly penetrating and harmful radiation

Question 31

True of atomic explosion and its effects to the human body a. the effects of atomic explosion of the human body are directly proportional to the distance b. The effects of atomic explosion are the same as that of ordinary chemical bomb explosion, and same intensity c. aside from the immediate traumatic effects, the radiation emitted by the radio-active substances can also have an effect which may be local or general d. All are true

Answer 31

D

Question 32

General effects of atomic explosion (3)

Answer 32

1. Massive dose causes generalized erythema, disorientation followed by coma and death 2. Lesser dose may cause nausea, vomiting followed by prostration and rapidly developing and persistent leukemia 3. Later symptoms may develop in the form of rise of temperature, ulceration of lymphoid, easy fatigability, oropharyngeal ulceration and severe leukopenia

Question 33

Factors responsible for the effect of B radiation (5)

Answer 33

``` Age Dosage Kind of radiation Fractional doses Sensitivity ```