ECHO 1_AREA2 - Quiz
  • 1. Which characteristic makes dental identification unique among other biological identifiers?
A) Teeth resist decomposition and extreme heat
B) Teeth change shape with age
C) Teeth regenerate after severe trauma
D) Teeth provide genetic information directly
  • 2. The Henry FBI Classification System primarily serves what purpose?
A) To organize fingerprint cards for retrieval
B) To detect forged fingerprints
C) To measure ridge density
D) To classify latent prints at crime scenes
  • 3. Why is dental charting superior during mass fatality incidents?
A) Dentition is highly resistant to post-mortem damage
B) It requires no prior dental records
C) Dental charts contain compulsory genetic markers
D) Dental features rarely match across victims
  • 4. In the Henry FBI system, what is the role of the Secondary Classification?
A) It refines the filing sequence using ridge patterns on index fingers
B) It classifies latent prints with insufficient ridge flow
C) It determines which fingerprints are suitable for database entry
D) It identifies Level 3 pore characteristics
  • 5. Which of the following best describes the purpose of descriptive biometric analysis (DBA)?
A) To analyze DNA in partially decomposed bodies
B) To match physical traits when friction ridges are unavailable
C) To categorize fingerprints by their whorl values
D) To measure body temperature variations post-mortem
  • 6. Why must classified fingerprint cards be arranged in numerical order?
A) It ensures standardized filing and efficient retrieval
B) It prevents contamination of fingerprint ink
C) It allows automatic destruction of old records
D) It segregates fingerprints by ethnicity and age
  • 7. A latent print contains clear bifurcations but lacks a visible core and delta. How should the examiner classify it?
A) As a loop pattern
B) As an arch pattern
C) As pattern-indeterminate
D) As a whorl pattern
  • 8. A fingerprint with two deltas and circular ridge flow should be classified as a:
A) Tented arch
B) Composite pattern
C) Radial loop
D) Plain whorl
  • 9. Two prints share equal ridge counts but differ significantly in ridge flow direction. What should the examiner apply?
A) Ridge count principle
B) Ridge density standard
C) Principle of individuality
D) Principle of permanence
  • 10. A loop fingerprint shows ridge irregularities due to surface distortion. How should the examiner evaluate these irregularities?
A) Reject the print based solely on the pattern
B) Evaluate minutiae configuration rather than the overall loop pattern
C) Convert the loop pattern into a whorl for easier analysis
D) Ignore minutiae and classify using pattern shape only
  • 11. Which principle justifies the admissibility of fingerprint evidence in court due to its unchanging nature?
A) Permanence
B) Divergence
C) Universality
D) Multiplicity
  • 12. Two fingerprints share ridge endings in the same area but differ in pore positions and ridge edge shapes. What conclusion is most accurate?
A) They are inconclusive due to lack of Level 1 detail
B) They belong to the same individual because ridge endings match
C) They originate from different individuals based on Level 3 differences
D) They can be considered identical after applying ridge counting
  • 13. A corpse has severely dried fingers. What method should be applied before taking prints?
A) Cut the finger and discard the skin
B) Use rehydration or tissue-builder injection
C) Apply magnetic powder
D) Use iodine fuming before rolling
  • 14. You must immediately develop latent prints on a smooth glass surface. What method is most suitable?
A) Iodine fuming
B) Powder dusting
C) Ninhydrin
D) Silver nitrate
  • 15. A rolled impression shows smudging due to downward pressure. How should the technician correct this?
A) Increase pressure to improve contrast
B) Roll the finger faster to limit distortion
C) Reduce pressure and allow natural rolling
D) Use only plain impressions instead of rolled
  • 16. A latent print on porous paper requires chemical development. Which sequence is best?
A) Ninhydrin → DFO → silver nitrate as needed
B) Powder → cyanoacrylate → magnetic powder
C) DFO → ninhydrin → water rinse
D) Superglue → black powder → ALS
  • 17. A latent print on rough, uneven wood must be preserved. What lifting method is appropriate?
A) Gel lifter
B) Adhesive tape
C) Heat transfer sheet
D) Ink transfer
  • 18. After cyanoacrylate fuming, ridge detail appears faint. Why does applying powder improve visibility?
A) Powder converts pores into visible white marks
B) Powder chemically dissolves cyanoacrylate
C) Cyanoacrylate prevents any further enhancement
D) The hardened cyanoacrylate surface enhances powder adhesion
  • 19. During the Analysis phase, you find a latent print with limited ridge clarity. What should you do?
A) Immediately declare the print an identification
B) Skip analysis and ask for supervisor approval
C) Proceed directly to comparison
D) Decide whether the print is suitable before moving on
  • 20. A verifier receives a fingerprint case already evaluated by another examiner. What method ensures objectivity?
A) Rejecting the first examiner’s conclusion automatically
B) Reprocessing the evidence using different chemicals
C) Conducting blind and independent verification
D) Reviewing the first examiner’s notes first
  • 21. Which principle of photography refers to arranging visual elements to create a balanced and meaningful image?
A) Composition
B) Light Intensity
C) Spectral Quality
D) Exposure Value
  • 22. What type of flash produces illumination directly toward the subject without redirection?
A) Bounce Flash
B) Rear-Curtain Flash
C) Off-Camera Flash
D) Direct Flash
  • 23. Hard light creates which characteristic effect on forensic photographs?
A) Minimal textural visibility
B) Soft blending of edges
C) Lower contrast on surfaces
D) Increased shadow definition
  • 24. Bounce flash is preferred in indoor crime scenes because it—
A) Eliminates the need for a tripod
B) Uses stronger wattage for sharp detail
C) Produces softer and more diffused illumination
D) Enhances only reflective surfaces
  • 25. Why is color temperature crucial in forensic documentation?
A) It avoids lens distortion
B) It limits the depth of field range
C) It determines the shutter speed accuracy
D) It ensures faithful representation of evidence colors
  • 26. The rule of thirds primarily helps the investigator achieve what goal?
A) Increase flash synchronization
B) Ensure realistic color tones
C) Prevent overexposure
D) Improve visual clarity and subject positioning
  • 27. An investigator photographs a low-light indoor scene without using flash. Which exposure adjustment is MOST appropriate to avoid motion blur?
A) Narrow the aperture to f/16
B) Reduce ISO to 100
C) Use a slower shutter speed
D) Increase ISO to a higher value
  • 28. When photographing a bloodstain pattern, the photographer must use a scale placed next to the stain. This procedural act demonstrates which forensic principle?
A) Evidence Size Documentation
B) Horizontal Composition Rule
C) Exaggeration Prevention Rule
D) Background Neutralization
  • 29. You must photograph a shoeprint at an oblique angle. Which camera setting will best enhance subtle surface details?
A) Small aperture, low ISO
B) Wide aperture, auto ISO
C) Slow shutter, high ISO
D) High ISO, fast shutter
  • 30. In photographing a dark outdoor crime scene, which action maximizes proper exposure without altering evidence?
A) Adjusting lens zoom to crop shadows
B) Increasing flash power directly at the evidence
C) Moving the evidence closer to artificial light
D) Increasing shutter time using a tripod
  • 31. During medium-range shots, the photographer must capture evidence relative to fixed surroundings. This ensures—
A) Flash reflection is avoided
B) Light intensity remains constant
C) Depth of field is minimized
D) Scene orientation is established
  • 32. When capturing fingerprints using an alternate light source, the photographer must adjust the camera to—
A) Match the wavelength with white balance settings
B) Increase shutter speed to darken fluorescence
C) Use high ISO to enhance ambient background
D) Disable macro mode to avoid magnification
  • 33. A crime scene photo appears overly bright with loss of detail on reflective surfaces. Which combination MOST likely caused the error?
A) Low ISO and fast shutter speed
B) Narrow aperture with rear flash
C) Slow shutter with diffused lighting
D) High ISO and wide aperture
  • 34. Two investigators photographed the same bullet trajectory. One used wide-angle; the other used telephoto. Which issue may arise in court?
A) Telephoto eliminates shadow accuracy
B) Telephoto may distort the color temperature
C) Wide-angle removes depth of field
D) Wide-angle may alter spatial relationships
  • 35. A digital camera fails to record images despite allowing shutter release. Which part should be checked FIRST?
A) Lens focusing ring
B) ISO control
C) Memory card slot
D) Image sensor
  • 36. When photographing very small fibers, which lens type ensures optimum magnification and detail?
A) Standard lens
B) Ultra-wide lens
C) Macro lens
D) Telephoto lens
  • 37. The investigator needs to minimize image noise while maintaining brightness. The most suitable action is—
A) Increase shutter speed
B) Raise ISO and narrow aperture
C) Disable autofocus
D) Lower ISO and widen aperture
  • 38. When using a manual/analogue camera in a dim room, which adjustment compensates for the absence of digital ISO controls?
A) Rotating memory dial
B) Adjusting lens mount
C) Selecting higher ASA film
D) Changing film advance lever
  • 39. A wide-angle lens produces slight edge distortion in scene photos. How may this affect forensic interpretation?
A) May shift color temperature drastically
B) May misrepresent the distance between objects
C) May remove shadow details entirely
D) May increase exposure stability
  • 40. A camera shows blurry close-up images despite proper lighting. Review indicates the photographer used a telephoto lens at minimum focusing distance. What is the likely cause?
A) Image sensor malfunctioned
B) Telephoto lenses cannot capture contrast
C) Minimum focusing distance exceeded
D) Shutter curtain failed to synchronize
  • 41. Which principle best explains why forensic chemists must use validated analytical procedures when examining seized chemical evidence?
A) To prevent the need for confirmatory testing
B) To allow investigators to bypass the chain of custody
C) To guarantee results are reproducible and legally defensible
D) To ensure evidence is stored in climate-controlled facilities
  • 42. The significance of toxicological findings in court primarily depends on which factor?
A) The popularity of the analytical instrument used
B) The financial value of the toxic substance detected
C) The quantity of samples submitted by the investigator
D) The interpretation of toxin concentration relative to physiological effects
  • 43. Which statement correctly differentiates preliminary from confirmatory tests in forensic chemistry?
A) Preliminary tests require accreditation, while confirmatory tests do not
B) Preliminary tests permanently identify a substance, while confirmatory tests only screen
C) Preliminary tests are presumptive, while confirmatory tests specifically identify substances
D) Confirmatory tests rely on color changes, while preliminary tests use instrumentation
  • 44. A crime scene technician performs a Kastle-Meyer test on a red stain and obtains a rapid pink color change. What is the MOST appropriate next step to ensure admissibility?
A) Conclude immediately that the stain is human blood
B) Perform a confirmatory test, such as a Takayama or Teichmann test
C) Collect only photographs since the test already confirmed blood
D) Disregard the sample due to possible contamination
  • 45. During the collection of semen evidence on fabric, which procedure BEST preserves its forensic value?
A) Applying heat to accelerate drying before packaging`
B) Packaging the moist fabric in plastic to prevent air exposure
C) Air-drying the fabric and placing it in a breathable paper container
D) Folding the fabric tightly to secure the stain
  • 46. While collecting glass fragments from a hit-and-run scene, which action MOST ensures accurate comparative analysis?
A) Cleaning the fragments with water before packaging
B) Separating fragments by size and origin before sealing
C) Mixing all fragments from different areas into one container
D) Placing fragments into cotton-filled plastic bags to minimize noise
  • 47. A victim is suspected of poisoning from an organophosphate pesticide. Which treatment is MOST appropriate to administer based on toxicological principles?
A) Atropine with pralidoxime (2-PAM)
B) Sodium bicarbonate infusion
C) Activated charcoal only
D) High-dose vitamin K therapy
  • 48. A forensic toxicologist must distinguish between cyanide poisoning and carbon monoxide poisoning. Which comparison is MOST forensically relevant?
A) Cyanide causes cherry-red skin, while carbon monoxide does not
B) Carbon monoxide poisoning typically changes blood to greenish color
C) Carbon monoxide smells like almonds, while cyanide has no odor
D) Cyanide inhibits cellular respiration, while carbon monoxide forms carboxyhemoglobin
  • 49. Which of the following is classified as a public document?
A) A personal diary
B) A company memo
C) A notarized affidavit
D) A handwritten personal letter
  • 50. Which equipment is primarily used to detect indented writing on a questioned document?
A) IR lamp
B) VSC
C) Stereomicroscope
D) ESDA
  • 51. A document examiner uses an infrared light source to evaluate a questioned contract. Which issue is this technique MOST suited to detect?
A) Chemical erasures or overwritten ink
B) The presence of signature tremors
C) Paper fiber uniqueness
D) Pen pressure inconsistencies
  • 52. A faded receipt is examined using a Video Spectral Comparator. What is the main advantage of this tool?
A) It measures paper thickness with high precision
B) It magnifies handwriting strokes up to 1000x
C) It reveals erased or overwritten text using multi-spectral imaging
D) It detects the weight of ink residue
  • 53. An altered bank document shows mismatched ink under UV light. This discrepancy indicates:
A) The paper is of inferior quality
B) The writer used excessive pressure when signing
C) The document contains natural handwriting variation
D) Ink from different batches or pens was used
  • 54. A signature shows slow movement, tremors, and unnatural pauses. What type of forgery is MOST likely present?
A) Freehand imitation
B) Disguised signature
C) Forgery through tracing
D) Natural variation
  • 55. A questioned signature shows heavy pen pressure at the beginning and end of strokes, uncommon in the writer’s known samples. What does this suggest?
A) Ink used was incompatible
B) The signature may be simulated
C) It is an authentic signature
D) The writer was in a hurry
  • 56. A handwriting expert compares known and questioned writings. He observes the same unique pen lift pattern before the letter "t." What principle is being applied?
A) Class characteristics
B) Natural variation
C) Individual characteristics
D) Line quality analysis
  • 57. A check shows altered numbers where the original ink reacts differently under IR examination. What is the conclusion?
A) Alteration likely occurred
B) The lighting technique was incorrect
C) The ink was exposed to moisture
D) The paper is counterfeit
  • 58. A forged document shows uniform spacing and mechanical alignment in the signature. This is characteristic of:
A) Signature stamp or machine signature
B) Simulation
C) Freehand forgery
D) Typewriter output
  • 59. The examiner notices baseline drift and inconsistent slant in a questioned handwritten note. What does this BEST indicate?
A) Habitual writing behavior
B) Possible disguise attempt
C) A natural signature variation
D) Impairment or loss of motor control
  • 60. A suspect denies authorship of a document. The examiner requests "extended handwriting specimens." Why?
A) To observe fatigue in writing
B) To obtain a sufficient range of natural variation
C) To assess quality of ink
D) To determine paper density
  • 61. A contract shows two lines written with identical flow, pressure, and shading but different pen tips under microscopic view. What does this imply?
A) The paper absorbed ink unevenly
B) The writing is genuine
C) The writer used two pens intentionally
D) A mechanical copying method was used
  • 62. A signature appears genuine in line quality but contradicts the writer’s usual habit of connecting letters. Microscopic analysis shows deliberate stops between strokes. What is the most reasonable conclusion?
A) The ink has degraded over time
B) The signature is authentic with natural variation
C) The writer was under stress
D) The signature is simulated
  • 63. A banknote passes the watermark test but fails the UV fluorescence test. What does this contrast MOST likely indicate?
A) The UV lamp is defective
B) The note is genuine but old
C) It is a hybrid counterfeit using mixed materials
D) The security thread has naturally faded
  • 64. A suspected fake ID shows correct hologram placement but inconsistent microprinting under magnification. What is the strongest conclusion?
A) The hologram was transferred from a real ID
B) Microprinting is naturally variable
C) The document was damaged by moisture
D) The ID is authentic but worn out
  • 65. Which of the following is a primary physiological indicator used in polygraph examinations?
A) Skin conductance
B) Pupil dilation
C) Eye color
D) Blood pressure
  • 66. Polygraph accuracy can be significantly affected by which factor?
A) Ambient room temperature only
B) Examiner skill and experience
C) Length of examination only
D) Subject’s favorite color
  • 67. Why are control questions used in polygraph tests?
A) To determine the subject’s memory capacity
B) To directly detect lies about the incident
C) To confuse the subject and induce errors
D) To establish baseline physiological responses for comparison
  • 68. How can a subject’s psychological state affect polygraph accuracy?
A) It has no measurable effect
B) It improves the detection of deception automatically
C) Only physical factors matter, not psychological
D) Anxiety or fear may exaggerate physiological responses
  • 69. During which phase of polygraph examination is the subject first interviewed?
A) Post-test phase
B) In-test phase
C) Pre-test phase
D) Control phase
  • 70. A sudden spike in galvanic skin response is observed on the chart. This is likely recorded using:
A) Galvanometer
B) Thermometer
C) Cardiograph
D) Pneumograph
  • 71. If a subject reacts strongly to a control question but minimally to a relevant question, the examiner should:
A) Ignore both responses
B) Restart the entire test
C) Consider the control response valid and relevant response non-deceptive
D) Consider the relevant question deceptive
  • 72. Which polygraph component measures respiration?
A) Computer software
B) Galvanometer
C) Pneumograph
D) Cardio sensor
  • 73. What is the purpose of irrelevant questions in a polygraph test?
A) To test memory retention
B) To confuse the subject
C) To establish baseline physiological responses
D) To directly confirm deception
  • 74. How should chart markings be interpreted during evaluation?
A) Only using computer software
B) Only by visual inspection
C) By comparing responses to relevant, control, and irrelevant questions
D) By ignoring baseline readings
  • 75. A polygraph examiner notes inconsistent heart rate changes across all question types. The next step is:
A) Declare deception immediately
B) Ignore inconsistencies
C) Re-evaluate data and consider external factors
D) Ask more irrelevant questions
  • 76. An examiner observes that a subject’s physiological responses are unusually flat. Which evaluation is most appropriate?
A) Increase the number of relevant questions
B) Consider possible countermeasures or medical conditions affecting accuracy
C) Conclude deception automatically
D) Ignore the responses and continue
  • 77. A polygraph test shows strong responses to irrelevant questions but mild responses to relevant questions. What can be inferred?
A) Subject is definitely truthful
B) Subject’s baseline responses are high, making relevant responses less conclusive
C) Subject is likely deceptive
D) Examiner should add more control questions
  • 78. Comparing reactions to control and relevant questions helps the examiner to:
A) Analyze physiological deviation and detect deception
B) Predict subject’s future behavior
C) Measure subject’s memory accuracy
D) Determine the subject’s emotional intelligence
  • 79. Which instrument is primarily used to compare the striations on two bullets?
A) Caliper
B) Ballistic chronograph
C) Rifling gauge
D) Comparison microscope
  • 80. Why is photographing ballistic evidence before collection important at a crime scene?
A) It identifies the firearm used
B) It prevents contamination of evidence
C) It ensures visual documentation of position and condition
D) It helps in measuring rifling impressions
  • 81. During crime scene processing, which procedure ensures proper chain of custody?
A) Comparing bullets in the laboratory
B) Testing the firearm immediately
C) Photographing the suspect
D) Documenting every transfer and storage of evidence
  • 82. Which of the following best explains the role of ballistic evidence presentation in court?
A) To demonstrate internal ballistics to the jury
B) To illustrate the relationship between firearms, bullets, and cartridge cases
C) To show expert’s opinion without physical exhibits
D) To determine the shooter’s intent
  • 83. What is the main purpose of using a ballistic chronograph in firearm examination?
A) To compare rifling impressions
B) To identify firearm serial numbers
C) To measure bullet speed and trajectory
D) To document cartridge case markings
  • 84. Which precaution is essential when presenting a firearm in court?
A) Disassembling the firearm in open court
B) Testing bullets in front of the jury
C) Loading the firearm to demonstrate firing
D) Removing all ammunition and rendering it safe
  • 85. A bullet recovered from a crime scene has rifling impressions matching a suspect’s firearm. This analysis demonstrates:
A) Terminal ballistics
B) Internal ballistics
C) Individual characteristics
D) Class characteristics
  • 86. A revolver is classified under which type of firearm?
A) Rifle
B) Machine gun
C) Handgun
D) Shotgun
  • 87. Which part of ammunition ignites the gunpowder when struck?
A) Cartridge case
B) Primer
C) Firing pin
D) Bullet
  • 88. Determining the trajectory of a bullet after it leaves the barrel is an example of:
A) Internal ballistics
B) External ballistics
C) Terminal ballistics
D) Forensic ballistics
  • 89. A fired cartridge case exhibits unique marks from the extractor and ejector. These are examples of:
A) Ammunition design
B) Internal ballistics
C) Class characteristics
D) Individual characteristics
  • 90. Identifying the make and model of a firearm based on caliber and rifling is an example of:
A) External ballistics
B) Individual characteristics
C) Terminal ballistics
D) Class characteristics
  • 91. Which branch of ballistics studies the effect of a bullet on a target?
A) Internal ballistics
B) Forensic ballistics
C) Terminal ballistics
D) External ballistics
  • 92. A semi-automatic rifle is fired, and the bullet path is traced to a tree. This investigation falls under:
A) External ballistics
B) Internal ballistics
C) Terminal ballistics
D) Firearm classification
  • 93. Which ammunition component determines the bullet’s size and fit within the barrel?
A) Primer
B) Gunpowder
C) Bullet
D) Cartridge case
  • 94. An expert concludes that multiple bullets came from the same firearm after analysis. This conclusion is most critical for:
A) Assessing external ballistics
B) Determining class characteristics
C) Establishing individual characteristics
D) Evaluating firearm classification
  • 95. What is the safest way to collect a firearm at a crime scene?
A) Hand it to anyone nearby
B) Remove ammunition and secure the firearm
C) Test fire before collection
D) Keep it loaded while packaging
  • 96. Why is assigning identification numbers to bullets and cartridge cases essential?
A) To determine firearm make and model
B) To maintain chain of custody and avoid confusion
C) To measure bullet velocity accurately
D) To assess terminal ballistics
  • 97. During evidence preservation, why must firearms be stored in controlled environments?
A) To prevent corrosion and preserve markings
B) To load them for demonstration
C) To test them before court
D) To analyze gunpowder separately
  • 98. Which factor is critical when handling fired cartridge cases to prevent contamination?
A) Keeping them in open air
B) Cleaning them immediately
C) Wearing gloves and using appropriate packaging
D) Polishing them for clarity
  • 99. You are tasked to create a forensic report for court presentation on a complex case involving multiple types of evidence. Which of the following approaches best ensures the report is both legally defensible and scientifically rigorous?
A) Include only results that support the prosecution’s case to simplify reading.
B) Limit technical explanations to avoid confusing the court.
C) Organize the report systematically, include all findings, and provide clear interpretations.
D) Use highly technical language throughout to demonstrate expertise.
  • 100. While handling a chemical sample in the laboratory, you notice a minor spill. What is the most appropriate immediate action according to standard laboratory safety procedures?
A) Continue the experiment and report the spill after finishing.
B) Evacuate the laboratory and leave the spill unattended.
C) Contain and clean the spill following the laboratory’s spill protocol while wearing proper PPE.
D) Call security personnel to remove the chemical immediately.
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