ECHO 1_AREA2
  • 1. Which characteristic makes dental identification unique among other biological identifiers?
A) Teeth regenerate after severe trauma
B) Teeth provide genetic information directly
C) Teeth change shape with age
D) Teeth resist decomposition and extreme heat
  • 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) Dental features rarely match across victims
C) Dental charts contain compulsory genetic markers
D) It requires no prior dental records
  • 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 identifies Level 3 pore characteristics
C) It determines which fingerprints are suitable for database entry
D) It classifies latent prints with insufficient ridge flow
  • 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 ensures standardized filing and efficient retrieval
B) It segregates fingerprints by ethnicity and age
C) It prevents contamination of fingerprint ink
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 whorl pattern
B) As an arch pattern
C) As pattern-indeterminate
D) As a loop pattern
  • 8. A fingerprint with two deltas and circular ridge flow should be classified as a:
A) Tented arch
B) Plain whorl
C) Composite pattern
D) Radial loop
  • 9. Two prints share equal ridge counts but differ significantly in ridge flow direction. What should the examiner apply?
A) Principle of individuality
B) Ridge count principle
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) Ignore minutiae and classify using pattern shape only
B) Convert the loop pattern into a whorl for easier analysis
C) Evaluate minutiae configuration rather than the overall loop pattern
D) Reject the print based solely on the pattern
  • 11. Which principle justifies the admissibility of fingerprint evidence in court due to its unchanging nature?
A) Multiplicity
B) Divergence
C) Universality
D) Permanence
  • 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 can be considered identical after applying ridge counting
B) They originate from different individuals based on Level 3 differences
C) They belong to the same individual because ridge endings match
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) Apply magnetic powder
B) Use iodine fuming before rolling
C) Use rehydration or tissue-builder injection
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) Powder dusting
C) Ninhydrin
D) Iodine fuming
  • 15. A rolled impression shows smudging due to downward pressure. How should the technician correct this?
A) Reduce pressure and allow natural rolling
B) Use only plain impressions instead of rolled
C) Increase pressure to improve contrast
D) Roll the finger faster to limit distortion
  • 16. A latent print on porous paper requires chemical development. Which sequence is best?
A) Superglue → black powder → ALS
B) Powder → cyanoacrylate → magnetic powder
C) Ninhydrin → DFO → silver nitrate as needed
D) DFO → ninhydrin → water rinse
  • 17. A latent print on rough, uneven wood must be preserved. What lifting method is appropriate?
A) Gel lifter
B) Adhesive tape
C) Ink transfer
D) Heat transfer sheet
  • 18. After cyanoacrylate fuming, ridge detail appears faint. Why does applying powder improve visibility?
A) The hardened cyanoacrylate surface enhances powder adhesion
B) Powder converts pores into visible white marks
C) Powder chemically dissolves cyanoacrylate
D) Cyanoacrylate prevents any further enhancement
  • 19. During the Analysis phase, you find a latent print with limited ridge clarity. What should you do?
A) Proceed directly to comparison
B) Skip analysis and ask for supervisor approval
C) Decide whether the print is suitable before moving on
D) Immediately declare the print an identification
  • 20. A verifier receives a fingerprint case already evaluated by another examiner. What method ensures objectivity?
A) Conducting blind and independent verification
B) Rejecting the first examiner’s conclusion automatically
C) Reviewing the first examiner’s notes first
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) Spectral Quality
B) Composition
C) Light Intensity
D) Exposure Value
  • 22. What type of flash produces illumination directly toward the subject without redirection?
A) Off-Camera Flash
B) Rear-Curtain Flash
C) Direct Flash
D) Bounce Flash
  • 23. Hard light creates which characteristic effect on forensic photographs?
A) Increased shadow definition
B) Lower contrast on surfaces
C) Soft blending of edges
D) Minimal textural visibility
  • 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 ensures faithful representation of evidence colors
B) It limits the depth of field range
C) It avoids lens distortion
D) It determines the shutter speed accuracy
  • 26. The rule of thirds primarily helps the investigator achieve what goal?
A) Ensure realistic color tones
B) Improve visual clarity and subject positioning
C) Prevent overexposure
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) Use a slower shutter speed
B) Increase ISO to a higher value
C) Reduce ISO to 100
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) Horizontal Composition Rule
B) Exaggeration Prevention Rule
C) Evidence Size Documentation
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) Increasing shutter time using a tripod
B) Increasing flash power directly at the evidence
C) Moving the evidence closer to artificial light
D) Adjusting lens zoom to crop shadows
  • 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) Disable macro mode to avoid magnification
B) Increase shutter speed to darken fluorescence
C) Match the wavelength with white balance settings
D) Use high ISO to enhance ambient background
  • 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) Image sensor
B) Lens focusing ring
C) Memory card slot
D) ISO control
  • 36. When photographing very small fibers, which lens type ensures optimum magnification and detail?
A) Standard lens
B) Telephoto lens
C) Macro lens
D) Ultra-wide lens
  • 37. The investigator needs to minimize image noise while maintaining brightness. The most suitable action is—
A) Disable autofocus
B) Raise ISO and narrow aperture
C) Lower ISO and widen 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) Adjusting lens mount
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 increase exposure stability
B) May misrepresent the distance between objects
C) May shift color temperature drastically
D) May remove shadow details entirely
  • 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) Telephoto lenses cannot capture contrast
B) Image sensor malfunctioned
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 ensure evidence is stored in climate-controlled facilities
D) To guarantee results are reproducible and legally defensible
  • 42. The significance of toxicological findings in court primarily depends on which factor?
A) The popularity of the analytical instrument used
B) The interpretation of toxin concentration relative to physiological effects
C) The quantity of samples submitted by the investigator
D) The financial value of the toxic substance detected
  • 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 require accreditation, while confirmatory tests do not
C) Confirmatory tests rely on color changes, while preliminary tests use instrumentation
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) Perform a confirmatory test, such as a Takayama or Teichmann test
B) Collect only photographs since the test already confirmed blood
C) Disregard the sample due to possible contamination
D) Conclude immediately that the stain is human blood
  • 45. During the collection of semen evidence on fabric, which procedure BEST preserves its forensic value?
A) Folding the fabric tightly to secure the stain
B) Air-drying the fabric and placing it in a breathable paper container
C) Packaging the moist fabric in plastic to prevent air exposure
D) Applying heat to accelerate drying before packaging`
  • 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) Placing fragments into cotton-filled plastic bags to minimize noise
C) Separating fragments by size and origin before sealing
D) Mixing all fragments from different areas into one container
  • 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) High-dose vitamin K therapy
C) Atropine with pralidoxime (2-PAM)
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) Carbon monoxide poisoning typically changes blood to greenish color
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 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) Stereomicroscope
B) IR lamp
C) ESDA
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) Pen pressure inconsistencies
C) The presence of signature tremors
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 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 writer used excessive pressure when signing
B) The document contains natural handwriting variation
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) Natural variation
B) Disguised signature
C) Forgery through tracing
D) Freehand imitation
  • 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) It is an authentic signature
B) The writer was in a hurry
C) Ink used was incompatible
D) The signature may be simulated
  • 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) Individual characteristics
C) Line quality analysis
D) Class characteristics
  • 57. A check shows altered numbers where the original ink reacts differently under IR examination. What is the conclusion?
A) The lighting technique was incorrect
B) Alteration likely occurred
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) Freehand forgery
C) Typewriter output
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) Impairment or loss of motor control
D) A natural signature variation
  • 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 paper absorbed ink unevenly
D) The writing is genuine
  • 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 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) The UV lamp is defective
B) The security thread has naturally faded
C) It is a hybrid counterfeit using mixed materials
D) The note is genuine but old
  • 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) Microprinting is naturally variable
D) The hologram was transferred from a real ID
  • 65. Which of the following is a primary physiological indicator used in polygraph examinations?
A) Skin conductance
B) Eye color
C) Blood pressure
D) Pupil dilation
  • 66. Polygraph accuracy can be significantly affected by which factor?
A) Length of examination only
B) Ambient room temperature only
C) Subject’s favorite color
D) Examiner skill and experience
  • 67. Why are control questions used in polygraph tests?
A) To directly detect lies about the incident
B) To determine the subject’s memory capacity
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) Anxiety or fear may exaggerate physiological responses
B) It improves the detection of deception automatically
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) Pre-test phase
B) Post-test phase
C) Control phase
D) In-test phase
  • 70. A sudden spike in galvanic skin response is observed on the chart. This is likely recorded using:
A) Cardiograph
B) Thermometer
C) Galvanometer
D) Pneumograph
  • 71. If a subject reacts strongly to a control question but minimally to a relevant question, the examiner should:
A) Restart the entire test
B) Consider the control response valid and relevant response non-deceptive
C) Ignore both responses
D) Consider the relevant question deceptive
  • 72. Which polygraph component measures respiration?
A) Cardio sensor
B) Pneumograph
C) Computer software
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) Only by visual inspection
B) Only using computer software
C) By ignoring baseline readings
D) By comparing responses to relevant, control, and irrelevant questions
  • 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) Conclude deception automatically
B) Consider possible countermeasures or medical conditions affecting accuracy
C) Ignore the responses and continue
D) Increase the number of relevant questions
  • 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) Examiner should add more control questions
C) Subject’s baseline responses are high, making relevant responses less conclusive
D) Subject is definitely truthful
  • 78. Comparing reactions to control and relevant questions helps the examiner to:
A) Measure subject’s memory accuracy
B) Determine the subject’s emotional intelligence
C) Predict subject’s future behavior
D) Analyze physiological deviation and detect deception
  • 79. Which instrument is primarily used to compare the striations on two bullets?
A) Comparison microscope
B) Ballistic chronograph
C) Rifling gauge
D) Caliper
  • 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 prevents contamination of evidence
D) It identifies the firearm used
  • 81. During crime scene processing, which procedure ensures proper chain of custody?
A) Documenting every transfer and storage of evidence
B) Photographing the suspect
C) Comparing bullets in the laboratory
D) Testing the firearm immediately
  • 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 determine the shooter’s intent
C) To show expert’s opinion without physical exhibits
D) To illustrate the relationship between firearms, bullets, and cartridge cases
  • 83. What is the main purpose of using a ballistic chronograph in firearm examination?
A) To identify firearm serial numbers
B) To compare rifling impressions
C) To document cartridge case markings
D) To measure bullet speed and trajectory
  • 84. Which precaution is essential when presenting a firearm in court?
A) Removing all ammunition and rendering it safe
B) Loading the firearm to demonstrate firing
C) Testing bullets in front of the jury
D) Disassembling the firearm in open court
  • 85. A bullet recovered from a crime scene has rifling impressions matching a suspect’s firearm. This analysis demonstrates:
A) Individual characteristics
B) Class characteristics
C) Terminal ballistics
D) Internal ballistics
  • 86. A revolver is classified under which type of firearm?
A) Handgun
B) Machine gun
C) Rifle
D) Shotgun
  • 87. Which part of ammunition ignites the gunpowder when struck?
A) Bullet
B) Firing pin
C) Primer
D) Cartridge case
  • 88. Determining the trajectory of a bullet after it leaves the barrel is an example of:
A) Forensic ballistics
B) Internal ballistics
C) External ballistics
D) Terminal ballistics
  • 89. A fired cartridge case exhibits unique marks from the extractor and ejector. These are examples of:
A) Individual characteristics
B) Class characteristics
C) Internal ballistics
D) Ammunition design
  • 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) External ballistics
D) Individual characteristics
  • 91. Which branch of ballistics studies the effect of a bullet on a target?
A) Forensic ballistics
B) External ballistics
C) Internal 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) Firearm classification
B) Terminal ballistics
C) Internal ballistics
D) External ballistics
  • 93. Which ammunition component determines the bullet’s size and fit within the barrel?
A) Bullet
B) Primer
C) Cartridge case
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) Evaluating firearm classification
C) Assessing external ballistics
D) Establishing individual characteristics
  • 95. What is the safest way to collect a firearm at a crime scene?
A) Keep it loaded while packaging
B) Hand it to anyone nearby
C) Test fire before collection
D) Remove ammunition and secure the firearm
  • 96. Why is assigning identification numbers to bullets and cartridge cases essential?
A) To determine firearm make and model
B) To measure bullet velocity accurately
C) To maintain chain of custody and avoid confusion
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 test them before court
C) To load them for demonstration
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) Limit technical explanations to avoid confusing the court.
B) Organize the report systematically, include all findings, and provide clear interpretations.
C) Include only results that support the prosecution’s case to simplify reading.
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) Call security personnel to remove the chemical immediately.
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) Continue the experiment and report the spill after finishing.
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