(QUESTIONBANK) 509 QUESTIONS WITH ACTUAL
SOLUTIONS.
Which of the following best describes the value of field kits for chemical testing
of controlled substances?
A. they remove the necessity for laboratory analysis
B. they are presumptive tests
C. they have questionable reliability
D. they allow the officer to make a field identification Answer - They are
presumptive tests
The primary reason for proving "chain of custody" on a particular item in court
is to:
A. authenticate the item
B. Show how many people handled the item
C. Show how long it was in each person's possession
D. Deter or prevent unauthorized individuals from handling the evidence
Answer - authenticate the item
What is the highest energy in the spectral regions? Answer - Ultraviolet
Human genomic DNA is not found in: Answer - Red blood cells
,You receive an envelope containing a semi-automatic pistol for an operability
check. You open the envelope to examine the weapon. You first remove a fully
loaded magazine. The weapon is now:
A. Potentially still loaded and unsafe
B. Unloaded and safe
C. Potentially still loaded but safe
D. Rendered safe because of a magazine disconnect Answer - potentially still
loaded and unsafe
When handling biological materials, which of the following is the most
reasonable approach to take? Answer - Precautions should be taken regardless
of the condition or the origin of the samples being handled
Upon reviewing your notes for court appearance in one week, you realize that
there is a clerical error and two results have been reversed. What is the best
course of action? Answer - Immediately notify the attorney and issue a report
which makes the correction clear
Which of the following actions is not forbidden by the ABC Code of Professional
Conduct?
A. Embellishing one's qualifications when testifying
B. Utilizing a secret weapon
C. Refusing to honor a subpoena duces tecum
D. Interpreting equivocal results based only on an employer's wishes Answer -
utilizing a secret weapon
,A defendant has a combination of genetic marker types common to a particular
evidence stain and 0.1% of the population. This means:
A. Approximately 1 out of 1000 people would have the same types
B. the next 999 people that walked into the court room would not have the
same combination of types
C. we are 99.9% certain that the person responsible is being tried
D. we are 0.1% certain that the person responsible is being tried Answer -
approximately 1 out of 1000 people would have the same types
A drunk driver struck a pedestrian at a dark intersection. Realizing that the
headlamps were not on, the driver turns them on before the police arrive. The
broken right from low beam flashes and goes out. The police collect the
headlamp and submit it to you for examination. You are likely to find which of
the following indicators?
I. A sharp break
II. Hot deformation
III. Fused glass
IV. Large amounts of WO3 deposits
A. IV only
B. I only
C. II and III
D. II, III, and IV Answer - I only (a sharp break)
What purpose does humidity serve when processing latent prints with
Cyanoacrylate? Answer - Causes polymerization and the formation of white
particles on the ridges
, What are the most important components of a Polymerase chain reaction?
Answer - oligonucleotides
Which one of the following statements applies to FT-IR but NOT dispersive IR?
A. the technique is considered to be a confirmatory test
B. the resulting spectrum is a measure of molecular vibration
C. the infrared radiation is analyzed utilizing interferometer
D. solid samples are prepared by mixing the sample with KBr and pressing a
pellet Answer - the infrared radiation is analyzed utilizing interferometer
The differences in striation markings along a gun's bore could be the result of:
A. imperfections of the rifling cutter, distortions caused by a broach cutter, and
wear from the firing bullets over time
B. imperfections of the rifling cutter
C. distortions caused by a broach cutter
D. wear from the firing of bullets over time Answer - imperfections of the
rifling cutter, distortions caused by a broach cutter, and wear from the firing
bullets over time
How will the Rf values of eluents most likely be affected if a TLC tank is not kept
saturated with the developing solvent?
A. they will increase
B. they will decrease
C. they will increase or decrease unpredictably