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forensics final 2
| Question | Answer |
|---|---|
| Barbiturates act to: | Create a feeling of well being, promote relaxation, produce sleep |
| Which of the following is considered to be a hallucinogen? | Psilocybin, PCP, Mescaline |
| Marijuana is considered to be a: | Hallucinogen |
| Heroin is a chemical derivative of: | Morphine |
| Which is true of the use of mild tranquilizers? | They reduce tension |
| The use of which drug will NOT lead to physical dependence? | Cocaine |
| Which hallucinogen can be synthesized by a simple chemical process and is often manufactured in clandestine laboratories? | PCP |
| Which physical symptom is part of the abstinence syndrome? | Convulsions, Body Chills, stomach cramps and vomiting |
| Which is the most widely used illicit drug in the United States today? | Marijuana |
| The specificity of microcrystalline tests is ________ the specificity of color tests. | Greater than |
| Most narcotics are: | Obtained from opium, physically addicting, depressants to the central nervous system |
| Which technique allows for both separation and specific identification of a questioned mixture of substances? | GC/MS |
| Duquenois-Levine solutions were used on a sample and the chloroform layer turned purple. This suggests that the tested substance is: | Marijuana |
| The tranquilizers Valium and Librium are classified in which schedule of the Controlled Substances Act? | IV |
| Methamphetamine is a: | stimulant |
| A compound can tentatively be identified by gas chromatography from its: | Retention time |
| The Marquis Reagent was used on drug evidence and it turned purple. The drug being tested could be: | Heroin |
| What is true about the "club drug" Rohypnol? | Odorless, colorless, tasteless, enhanced when combined with alcohol |
| Which is the most widely used and abused drug? | Alcohol |
| Which absorption spectrum is equivalent to a "fingerprint" of a substance and can be used for identification purposes? | IR |
| Which part of cannabis contains the LEAST amount of THC? | Seeds |
| The DOT set the maximum allowable blood alcohol concentration for commercial truck and bus drivers at: | 0.04% |
| Which is NOT a factor in determining the rate at which alcohol is absorbed into the bloodstream? | Amount consumed, presence of food in stomach, alcohol content |
| Alcohol is oxidized in the body primarily in: | The liver |
| The toxicologist's capabilities are NOT directly dependent on the input from the: | Case prosecutor |
| The Reinsch test would NOT be used to detect: | Copper |
| The DRE program incorporates standardized methods for examining suspects to determine: | Under the influence of one or more drugs |
| About 95-98 percent of alcohol is oxidized to what two substances? | water and Carbon dioxide |
| Carbon monoxide is toxic because it: | Combines with hemoglobin to form carboxyhemoglobin |
| The analytical technique widely used for directly measuring the amount of alcohol present in the blood is: | Gas Chromatography |
| For the purpose of extracting the drug out of body tissues, an amphetamine is classified as an: | Basic drug |
| Upon entering the bloodstream, heroin is almost immediately metabolized into: | Morphine |
| The presence of high levels of carbon monoxide in the blood of a victim found at the scene of a suspicious fire is proof that the victim: | Perished after the fire started |
| A drug recognition expert (DRE) can: | Advise the toxicologist as to which drug may be impairing an individual |
| A breath test may be used to analyze | ethyl alcohol |
| A substance with a pH of 8 is likely to be: | Basic |
| The rate of alcohol absorption on a full stomach is ________ the rate of absorption on an empty stomach. | less than |
| In forensic toxicology, all positive drug findings must be confirmed by a specific chemical test. The confirmation test of choice is: | Gas chromatography- mass spectrometry |
| Alcohol is eliminated from the body chemically unchanged in: | Breath, perspiration, Urine |
| The concentration of alcohol in an exhaled breath is in direct proportion to that of the blood of the same individual. The ratio of this relationship is closest to: | 1:2,000 |
| In the case of Schmerber v. California, blood was categorized as being: | Nontestimonial evidence |
| Analyzing segments of hair for drug content may define the timeline for drug use, dating it back over a period of: | Days, weeks, years |
| Blood is drawn from a living suspect involved in an automobile accident. If the specimen is kept unrefrigerated and at a moderately warm temperature the alcohol concentration can be expected to: | Decreases with time |
| After a blood sample is collected for alcohol testing, a(n) ________ is added to stop the blood from clotting. | Anti-Coagulant |
| There is a(n) ________ relationship between the amount of alcohol in the blood and that in the alveolar breath. | Direct |
| Field sobriety tests that can be employed to ascertain the degree of an individual's alcohol impairment normally do not include the following: | Gas chromatography |
| The emission spectrograph is used to determine the: | Elemental composition of a substance |
| Neutron activation analysis involves bombarding specimens with neutrons and then measuring the resultant: | Gamma rays |
| Paint binders can be chemically analyzed using: | Pyrolysis GC and IR spectrophotometry |
| If soil is found adhering to an object, the investigator should remove the soil particles from the object and send them to the laboratory. | False |
| The variety of coatings applied to the body of an automobile adds significant diversity to automobile paint and contributes to the forensic significance of automobile paint comparisons. | True |
| The minerals found in different soil samples cannot effectively be used to determine whether or not they have the same origin. | False |
| Emission spectroscopy measures the frequency of light emitted by an atom when one of its electrons moves to a higher orbital. | False |
| Which is NOT part of the composition of paint? | Adhesive |
| An element is selective in the frequency of light it will absorb. This selectivity is due to its: | Electron energy levels |
| Paint chips may be individualized to a single source by examining their: | Color and layer structure |
| Automobile finishes typically contain which layer(s)? | Electrocoat primer, colorcoat, clearcoat |
| After the paint has been applied to a surface, the solvent evaporates. | True |
| After examining small paint chips from an auto accident scene and using the PDQ database, the crime lab worker can determine the ________ of the vehicle. | Year, model, make |
| What type of evidence would be expected to have trace elements? | Paint, bullet fragments, glass, metal objects, soil, gun primer particles |
| What is the logical first step in soil analysis? | Comparison of dried soil sample for color and texture |
| Standard/reference soil samples should be collected at the site of the crime at various intervals within a 100-foot radius of the crime scene. | True |
| Which property imparts paint with its most distinctive forensic characteristics? | Color-layer sequence |
| The ________ properties of crystals, such as refractive index and birefringence, provide points of identification that help characterize them. | Optical |
| Which coat represents the "eye appeal"? | Basecoat |
| Which would be LEAST useful in identifying a mineral crystal? | Size |
| It is not necessary that the collected paint from a vehicle involved in a hit-and-run accident be close to the area of the car suspected of being in contact with the victim. | False |
| Which coating provides resistance to corrosion? | Electrocoat primer |
| Paint as physical evidence is most frequently encountered in: | Burglary, hit and run |
| The concentration of the absorbing element is directly proportional to the quantity of the light absorbed. | True |
| The investigator should not try to remove trace paint evidence found on a tool but package the tool for laboratory examination instead. | True |
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