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