ECHO 1_AREA2
  • 1. Which characteristic makes dental identification unique among other biological identifiers?
A) Teeth resist decomposition and extreme heat
B) Teeth regenerate after severe trauma
C) Teeth provide genetic information directly
D) Teeth change shape with age
  • 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) Dental charts contain compulsory genetic markers
C) Dentition is highly resistant to post-mortem damage
D) Dental features rarely match across victims
  • 4. In the Henry FBI system, what is the role of the Secondary Classification?
A) It classifies latent prints with insufficient ridge flow
B) It identifies Level 3 pore characteristics
C) It refines the filing sequence using ridge patterns on index fingers
D) It determines which fingerprints are suitable for database entry
  • 5. Which of the following best describes the purpose of descriptive biometric analysis (DBA)?
A) To analyze DNA in partially decomposed bodies
B) To measure body temperature variations post-mortem
C) To match physical traits when friction ridges are unavailable
D) To categorize fingerprints by their whorl values
  • 6. Why must classified fingerprint cards be arranged in numerical order?
A) It prevents contamination of fingerprint ink
B) It ensures standardized filing and efficient retrieval
C) It segregates fingerprints by ethnicity and age
D) It allows automatic destruction of old records
  • 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 a whorl pattern
D) As pattern-indeterminate
  • 8. A fingerprint with two deltas and circular ridge flow should be classified as a:
A) Radial loop
B) Plain whorl
C) Tented arch
D) Composite pattern
  • 9. Two prints share equal ridge counts but differ significantly in ridge flow direction. What should the examiner apply?
A) Ridge density standard
B) Principle of individuality
C) Principle of permanence
D) Ridge count principle
  • 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) Ignore minutiae and classify using pattern shape only
C) Evaluate minutiae configuration rather than the overall loop pattern
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) Universality
B) Permanence
C) Multiplicity
D) Divergence
  • 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 belong to the same individual because ridge endings match
B) They can be considered identical after applying ridge counting
C) They originate from different individuals based on Level 3 differences
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 rehydration or tissue-builder injection
B) Apply magnetic powder
C) Use iodine fuming before rolling
D) Cut the finger and discard the skin
  • 14. You must immediately develop latent prints on a smooth glass surface. What method is most suitable?
A) Silver nitrate
B) Ninhydrin
C) Iodine fuming
D) Powder dusting
  • 15. A rolled impression shows smudging due to downward pressure. How should the technician correct this?
A) Use only plain impressions instead of rolled
B) Reduce pressure and allow natural rolling
C) Roll the finger faster to limit distortion
D) Increase pressure to improve contrast
  • 16. A latent print on porous paper requires chemical development. Which sequence is best?
A) DFO → ninhydrin → water rinse
B) Superglue → black powder → ALS
C) Powder → cyanoacrylate → magnetic powder
D) Ninhydrin → DFO → silver nitrate as needed
  • 17. A latent print on rough, uneven wood must be preserved. What lifting method is appropriate?
A) Heat transfer sheet
B) Ink transfer
C) Adhesive tape
D) Gel lifter
  • 18. After cyanoacrylate fuming, ridge detail appears faint. Why does applying powder improve visibility?
A) Powder chemically dissolves cyanoacrylate
B) Cyanoacrylate prevents any further enhancement
C) Powder converts pores into visible white marks
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) Decide whether the print is suitable before moving on
B) Immediately declare the print an identification
C) Proceed directly to comparison
D) Skip analysis and ask for supervisor approval
  • 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) Conducting blind and independent verification
C) Rejecting the first examiner’s conclusion automatically
D) Reprocessing the evidence using different chemicals
  • 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) Direct Flash
B) Off-Camera Flash
C) Bounce Flash
D) Rear-Curtain Flash
  • 23. Hard light creates which characteristic effect on forensic photographs?
A) Soft blending of edges
B) Increased shadow definition
C) Minimal textural visibility
D) Lower contrast on surfaces
  • 24. Bounce flash is preferred in indoor crime scenes because it—
A) Produces softer and more diffused illumination
B) Uses stronger wattage for sharp detail
C) Eliminates the need for a tripod
D) Enhances only reflective surfaces
  • 25. Why is color temperature crucial in forensic documentation?
A) It limits the depth of field range
B) It determines the shutter speed accuracy
C) It ensures faithful representation of evidence colors
D) It avoids lens distortion
  • 26. The rule of thirds primarily helps the investigator achieve what goal?
A) Improve visual clarity and subject positioning
B) Prevent overexposure
C) Ensure realistic color tones
D) Increase flash synchronization
  • 27. An investigator photographs a low-light indoor scene without using flash. Which exposure adjustment is MOST appropriate to avoid motion blur?
A) Increase ISO to a higher value
B) Reduce ISO to 100
C) Use a slower shutter speed
D) Narrow the aperture to f/16
  • 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) Background Neutralization
B) Exaggeration Prevention Rule
C) Evidence Size Documentation
D) Horizontal Composition Rule
  • 29. You must photograph a shoeprint at an oblique angle. Which camera setting will best enhance subtle surface details?
A) Slow shutter, high ISO
B) Wide aperture, auto ISO
C) Small aperture, low ISO
D) High ISO, fast shutter
  • 30. In photographing a dark outdoor crime scene, which action maximizes proper exposure without altering evidence?
A) Moving the evidence closer to artificial light
B) Adjusting lens zoom to crop shadows
C) Increasing flash power directly at the evidence
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) Scene orientation is established
C) Depth of field is minimized
D) Flash reflection is avoided
  • 32. When capturing fingerprints using an alternate light source, the photographer must adjust the camera to—
A) Increase shutter speed to darken fluorescence
B) Use high ISO to enhance ambient background
C) Disable macro mode to avoid magnification
D) Match the wavelength with white balance settings
  • 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) High ISO and wide aperture
C) Slow shutter with diffused lighting
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 eliminates shadow accuracy
B) Wide-angle removes depth of field
C) Wide-angle may alter spatial relationships
D) Telephoto may distort the color temperature
  • 35. A digital camera fails to record images despite allowing shutter release. Which part should be checked FIRST?
A) Image sensor
B) Lens focusing ring
C) ISO control
D) Memory card slot
  • 36. When photographing very small fibers, which lens type ensures optimum magnification and detail?
A) Ultra-wide lens
B) Macro lens
C) Standard lens
D) Telephoto lens
  • 37. The investigator needs to minimize image noise while maintaining brightness. The most suitable action is—
A) Lower ISO and widen aperture
B) Raise ISO and narrow aperture
C) Increase shutter speed
D) Disable autofocus
  • 38. When using a manual/analogue camera in a dim room, which adjustment compensates for the absence of digital ISO controls?
A) Adjusting lens mount
B) Selecting higher ASA film
C) Rotating memory dial
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 remove shadow details entirely
B) May increase exposure stability
C) May misrepresent the distance between objects
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) Shutter curtain failed to synchronize
B) Image sensor malfunctioned
C) Telephoto lenses cannot capture contrast
D) Minimum focusing distance exceeded
  • 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 financial value of the toxic substance detected
B) The quantity of samples submitted by the investigator
C) The popularity of the analytical instrument used
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) Preliminary tests are presumptive, while confirmatory tests specifically identify substances
C) Confirmatory tests rely on color changes, while preliminary tests use instrumentation
D) Preliminary tests require accreditation, while confirmatory tests do not
  • 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) Collect only photographs since the test already confirmed blood
C) Disregard the sample due to possible contamination
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) 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) Mixing all fragments from different areas into one container
C) Placing fragments into cotton-filled plastic bags to minimize noise
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) Atropine with pralidoxime (2-PAM)
C) High-dose vitamin K therapy
D) Activated charcoal only
  • 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 causes cherry-red skin, while carbon monoxide does not
C) Cyanide inhibits cellular respiration, while carbon monoxide forms carboxyhemoglobin
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 notarized affidavit
C) A handwritten personal letter
D) A company memo
  • 50. Which equipment is primarily used to detect indented writing on a questioned document?
A) ESDA
B) Stereomicroscope
C) VSC
D) IR lamp
  • 51. A document examiner uses an infrared light source to evaluate a questioned contract. Which issue is this technique MOST suited to detect?
A) Pen pressure inconsistencies
B) The presence of signature tremors
C) Paper fiber uniqueness
D) Chemical erasures or overwritten ink
  • 52. A faded receipt is examined using a Video Spectral Comparator. What is the main advantage of this tool?
A) It reveals erased or overwritten text using multi-spectral imaging
B) It detects the weight of ink residue
C) It magnifies handwriting strokes up to 1000x
D) It measures paper thickness with high precision
  • 53. An altered bank document shows mismatched ink under UV light. This discrepancy indicates:
A) The document contains natural handwriting variation
B) The writer used excessive pressure when signing
C) Ink from different batches or pens was used
D) The paper is of inferior quality
  • 54. A signature shows slow movement, tremors, and unnatural pauses. What type of forgery is MOST likely present?
A) Disguised signature
B) Forgery through tracing
C) Freehand imitation
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) The signature may be simulated
B) Ink used was incompatible
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) Natural variation
B) Line quality analysis
C) Class characteristics
D) Individual characteristics
  • 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) The lighting technique was incorrect
C) Alteration likely occurred
D) The paper is counterfeit
  • 58. A forged document shows uniform spacing and mechanical alignment in the signature. This is characteristic of:
A) Freehand forgery
B) Simulation
C) Typewriter output
D) Signature stamp or machine signature
  • 59. The examiner notices baseline drift and inconsistent slant in a questioned handwritten note. What does this BEST indicate?
A) Habitual writing behavior
B) A natural signature variation
C) Impairment or loss of motor control
D) Possible disguise attempt
  • 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 assess quality of ink
C) To observe fatigue in writing
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 writer used two pens intentionally
B) A mechanical copying method was used
C) The writing is genuine
D) The paper absorbed ink unevenly
  • 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 simulated
C) The signature is authentic with natural variation
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) The note is genuine but old
B) The security thread has naturally faded
C) It is a hybrid counterfeit using mixed materials
D) The UV lamp is defective
  • 64. A suspected fake ID shows correct hologram placement but inconsistent microprinting under magnification. What is the strongest conclusion?
A) The document was damaged by moisture
B) The ID is authentic but worn out
C) The hologram was transferred from a real ID
D) Microprinting is naturally variable
  • 65. Which of the following is a primary physiological indicator used in polygraph examinations?
A) Blood pressure
B) Pupil dilation
C) Skin conductance
D) Eye color
  • 66. Polygraph accuracy can be significantly affected by which factor?
A) Length of examination only
B) Ambient room temperature only
C) Examiner skill and experience
D) Subject’s favorite color
  • 67. Why are control questions used in polygraph tests?
A) To confuse the subject and induce errors
B) To establish baseline physiological responses for comparison
C) To determine the subject’s memory capacity
D) To directly detect lies about the incident
  • 68. How can a subject’s psychological state affect polygraph accuracy?
A) It improves the detection of deception automatically
B) Only physical factors matter, not psychological
C) Anxiety or fear may exaggerate physiological responses
D) It has no measurable effect
  • 69. During which phase of polygraph examination is the subject first interviewed?
A) Control phase
B) Post-test phase
C) In-test phase
D) Pre-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) Pneumograph
D) Cardiograph
  • 71. If a subject reacts strongly to a control question but minimally to a relevant question, the examiner should:
A) Consider the relevant question deceptive
B) Restart the entire test
C) Ignore both responses
D) Consider the control response valid and relevant response non-deceptive
  • 72. Which polygraph component measures respiration?
A) Pneumograph
B) Computer software
C) Cardio sensor
D) Galvanometer
  • 73. What is the purpose of irrelevant questions in a polygraph test?
A) To directly confirm deception
B) To establish baseline physiological responses
C) To confuse the subject
D) To test memory retention
  • 74. How should chart markings be interpreted during evaluation?
A) By comparing responses to relevant, control, and irrelevant questions
B) By ignoring baseline readings
C) Only by visual inspection
D) Only using computer software
  • 75. A polygraph examiner notes inconsistent heart rate changes across all question types. The next step is:
A) Ignore inconsistencies
B) Ask more irrelevant questions
C) Re-evaluate data and consider external factors
D) Declare deception immediately
  • 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) Ignore the responses and continue
C) Consider possible countermeasures or medical conditions affecting accuracy
D) Conclude deception automatically
  • 77. A polygraph test shows strong responses to irrelevant questions but mild responses to relevant questions. What can be inferred?
A) Subject is likely deceptive
B) Subject’s baseline responses are high, making relevant responses less conclusive
C) Subject is definitely truthful
D) Examiner should add more control questions
  • 78. Comparing reactions to control and relevant questions helps the examiner to:
A) Measure subject’s memory accuracy
B) Analyze physiological deviation and detect deception
C) Determine the subject’s emotional intelligence
D) Predict subject’s future behavior
  • 79. Which instrument is primarily used to compare the striations on two bullets?
A) Caliper
B) Comparison microscope
C) Rifling gauge
D) Ballistic chronograph
  • 80. Why is photographing ballistic evidence before collection important at a crime scene?
A) It ensures visual documentation of position and condition
B) It helps in measuring rifling impressions
C) It identifies the firearm used
D) It prevents contamination of evidence
  • 81. During crime scene processing, which procedure ensures proper chain of custody?
A) Testing the firearm immediately
B) Documenting every transfer and storage of evidence
C) Photographing the suspect
D) Comparing bullets in the laboratory
  • 82. Which of the following best explains the role of ballistic evidence presentation in court?
A) To illustrate the relationship between firearms, bullets, and cartridge cases
B) To demonstrate internal ballistics to the jury
C) To determine the shooter’s intent
D) To show expert’s opinion without physical exhibits
  • 83. What is the main purpose of using a ballistic chronograph in firearm examination?
A) To document cartridge case markings
B) To compare rifling impressions
C) To measure bullet speed and trajectory
D) To identify firearm serial numbers
  • 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) Removing all ammunition and rendering it safe
D) Testing bullets in front of the jury
  • 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) Shotgun
B) Rifle
C) Machine gun
D) Handgun
  • 87. Which part of ammunition ignites the gunpowder when struck?
A) Cartridge case
B) Bullet
C) Primer
D) Firing pin
  • 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) Individual characteristics
B) Internal ballistics
C) Ammunition design
D) Class characteristics
  • 90. Identifying the make and model of a firearm based on caliber and rifling is an example of:
A) Individual characteristics
B) Class characteristics
C) Terminal ballistics
D) External ballistics
  • 91. Which branch of ballistics studies the effect of a bullet on a target?
A) External ballistics
B) Internal ballistics
C) Forensic ballistics
D) Terminal ballistics
  • 92. A semi-automatic rifle is fired, and the bullet path is traced to a tree. This investigation falls under:
A) Terminal ballistics
B) External ballistics
C) Internal ballistics
D) Firearm classification
  • 93. Which ammunition component determines the bullet’s size and fit within the barrel?
A) Bullet
B) Primer
C) Gunpowder
D) Cartridge case
  • 94. An expert concludes that multiple bullets came from the same firearm after analysis. This conclusion is most critical for:
A) Evaluating firearm classification
B) Assessing external ballistics
C) Establishing individual characteristics
D) Determining class characteristics
  • 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 assess terminal ballistics
B) To measure bullet velocity accurately
C) To determine firearm make and model
D) To maintain chain of custody and avoid confusion
  • 97. During evidence preservation, why must firearms be stored in controlled environments?
A) To analyze gunpowder separately
B) To test them before court
C) To load them for demonstration
D) To prevent corrosion and preserve markings
  • 98. Which factor is critical when handling fired cartridge cases to prevent contamination?
A) Wearing gloves and using appropriate packaging
B) Polishing them for clarity
C) Keeping them in open air
D) Cleaning them immediately
  • 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) Use highly technical language throughout to demonstrate expertise.
B) Limit technical explanations to avoid confusing the court.
C) Organize the report systematically, include all findings, and provide clear interpretations.
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) Contain and clean the spill following the laboratory’s spill protocol while wearing proper PPE.
B) Continue the experiment and report the spill after finishing.
C) Call security personnel to remove the chemical immediately.
D) Evacuate the laboratory and leave the spill unattended.
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