Forensic Hair & Fiber Quiz

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Hair and fiber evidence basics.

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Disha Doddamani

Estados Unidos

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Forensic Hair & Fiber Quiz


Forensic Hair & Fiber QuizVersión en línea Hair and fiber evidence basics. por Disha Doddamani 1 What is direct transfer of fibers in forensics? a Fibers move directly between victim and suspect b Fibers only transfer via air c Fibers never transfer between people d Fibers are destroyed before transfer 2 What is secondary transfer in fiber analysis? a Fibers move only from surface to air b Fibers move from source to suspect to victim c Fibers transfer from victim to source d Fibers transfer only in lab tests 3 Which technique is nondestructive for fiber analysis? a X-ray diffraction b Polarizing light microscopy c Wet chemical test d Fiber burn analysis 4 Which nondestructive method uses infrared spectroscopy? a Infrared spectroscopy b Fluorescent microscopy c Autoclaving d Mass spectrometry 5 What is MSP in fiber analysis? a Microfiber Sample Processing b Mass Spectrometry Price c Microscopy with UV/visible light spectroscopy d Magnetic Susceptibility Probe 6 FTIR in fiber analysis stands for? a Fluorescent Tissue Infrared b Fourier Transform Infrared Analysis c Fiber Transmission Infrared Ratio d Frequency Tuning In Resins 7 What does a fiber burn analysis identify? a Fiber color only b Exact fabric brand c Age of fabric d Natural vs synthetic origin 8 Synthetic fibers typically show what burn trait? a No melt and no odor b Absorbs water instantly c Immediate disintegration d Melting and possible odor 9 Natural fibers often do what when burned? a Never burn b Turn into liquid metal c Smell like flowers d Burn to ash and smell like wood 10 What is class evidence in fiber analysis? a Fibers identify a specific person b Fibers prove a crime occurred c Fibers point to a source, not a person d Fibers reveal exact time of crime 11 Which items can fibers come from at a scene? a Clothing, carpet, upholstery b Only clothing c Only hair samples d Only carpets 12 What is cross section in fiber microscopy? a Color spectrum b Humidity level c Fiber shape for identification d Fiber age 13 What does thread count measure? a Amount of dye b Fiber length c Fabric color d Tightness of fabric weaving 14 What is cross transfer evidence called? a Locard’s Exchange Principle b Bayes’ Theorem c Occam’s Razor d Moore’s Law 15 Which fiber type is natural? a Polyester b Acrylic c Cotton (plant fiber) d Nylon 16 Which test is destructive? a FTIR b MSP c Fiber burn analysis d Polarizing microscopy 17 Fiber evidence classification depends on origin? a Only natural fibers exist b Yes—natural fibers are biological; synthetic are physical c No, all fibers are same d Only synthetic fibers exist 18 What instrument analyzes molecular groups in fibers? a Mass spectrometer b FTIR c Optical microscope d Gas chromatograph 19 What is the goal of fiber sampling? a Destroy all fibers b Only collect color data c Identify fiber characteristics without destroying evidence d Only determine origin 20 Which is a common observation under microscope? a Fabric brand b Crime scene time c Color, diameter, shape pattern d Owner’s name 21 What counts as trace evidence in forensics? a Large fabric scraps only b Very small fibers shed from textiles c Only biological fluids d No fibers at all 22 What is a common source of natural fibers? a Nylon polymer b Polyester polymer c Cotton plant d Acrylic polymer 23 What does a burn chart help with? a Calendar the burn date b Measure flame height c Identify fiber type from burn behavior d Determine fabric color only Feedback 1 Direct transfer is movement of fibers directly from one person to another. 2 Secondary transfer involves a source to suspect and then to the victim (or vice versa). 3 Polarizing light microscopy analyzes fibers without destroying them. 4 Infrared spectroscopy identifies molecular groups via IR absorption. 5 MSP combines microscopy with UV/visible light spectroscopy for tiny samples. 6 FTIR uses light absorption to identify molecular groups in fibers. 7 Burn characteristics help distinguish natural from synthetic fibers. 8 Synthetic fibers often melt and emit a chemical odor when burnt. 9 Natural fibers tend to burn and ash with a wood-like smell. 10 Fibers generally link to a source or type, not a unique individual. 11 Fibers may come from clothing, carpet, furniture, etc. 12 Cross section appearance helps characterize fiber type. 13 Thread count sums warp and weft to gauge weave density. 14 Locard’s principle explains transfer of fibers between objects. 15 Cotton is a natural plant fiber; others are synthetic. 16 Burning destroys the fiber to observe char/odor. 17 Natural fibers are often biological; synthetic are physical evidence. 18 FTIR identifies molecular groups via infrared absorption. 19 Non-destructive methods preserve evidence for further testing. 20 Microscopy notes color, diameter, and cross-section pattern. 21 Tiny fibers can link to an environment or item. 22 Cotton comes from plants, unlike synthetic polymers. 23 Burn charts compare how fibers char and melt to identify type.

Forensic Hair & Fiber Quiz

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Forensic Hair & Fiber QuizVersión en línea

por Disha Doddamani

What is direct transfer of fibers in forensics?

What is secondary transfer in fiber analysis?

Which technique is nondestructive for fiber analysis?

Which nondestructive method uses infrared spectroscopy?

What is MSP in fiber analysis?

FTIR in fiber analysis stands for?

What does a fiber burn analysis identify?

Synthetic fibers typically show what burn trait?

Natural fibers often do what when burned?

What is class evidence in fiber analysis?

Which items can fibers come from at a scene?

What is cross section in fiber microscopy?

What does thread count measure?

What is cross transfer evidence called?

Which fiber type is natural?

Which test is destructive?

Fiber evidence classification depends on origin?

What instrument analyzes molecular groups in fibers?

What is the goal of fiber sampling?

Which is a common observation under microscope?

What counts as trace evidence in forensics?

What is a common source of natural fibers?

What does a burn chart help with?