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Chapter 4 Fiber Review Forensics*

Total questions: 85

Worksheet time: 9mins

Name
Class
Date
1.

When fibers are transferred directly from victim to suspect or suspect to victim, this is called:

a)

necessary transfer.

b)

absolute transfer.

c)

direct transfer.

d)

None of these choices.

2.

The transfer of evidence such as a fiber from a source to a person, then to another person, is called:

a)

primary transfer.

b)

secondary transfer.

c)

tertiary transfer.

d)

direct transfer.

3.

Fiber evidence is gathered with:

a)

vacuums.

b)

tape.

c)

glue.

d)

forceps.

e)

lint roller.

4.

Fibers are classified as either:

a)

natural fibers or synthetic fibers.

b)

polymers or synthetic fibers.

c)

acrylic fibers or plant fibers.

d)

olefins or synthetic fibers.

5.

Natural fibers come from:

a)

animals.

b)

plants.

c)

minerals that are mined from the ground.

d)

All of these choices.

6.

The simplest weave pattern is the plain, or ____________, weave.

a)

abaca

b)

linen

c)

thread count

d)

satin

e)

tabby

7.

The number of threads that are packed together for any given amount of fabric is known as ___________.

a)

abaca

b)

linen

c)

thread count

d)

satin

e)

tabby

8.

Cotton is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

9.

Rayon is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

10.

Nylon is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

11.

Hemp is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

12.

Silk is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

13.

Acrylic is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

14.

Wool is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

15.

Jute is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

16.

Polyester is

a)

A synthetic fiber

b)

A natural fiber

c)

An artificial fiber

17.

This type of fiber is found in plants or animals.

a)

Natural

b)

Artificial

c)

Synthetic

18.

This type of fiber is made primarily from plastics.

a)

Natural

b)

Artificial

c)

Synthetic

19.

A forensic scientist performs a burn test and finds that the fiber melts when it is put in the flame. This suggests that the fiber is…

a)

A synthetic fiber

b)

A natural fiber

20.

This weave pictured is

a)

Satin

b)

Plain

c)

Twill

21.

This weave pictured is

a)

Satin

b)

Plain

c)

Twill

22.

A blue fiber found at the crime scene is…

a)

Direct Evidence

b)

Class Evidence

c)

Testimonial Evidence

d)

Individual Evidence

23.

A blue polyester fiber found at the crime scene matches the outfit the suspect was wearing at the time they allegedly committed the crime. What type of evidence is this?

a)

Individual Evidence

b)

Direct Evidence

c)

Testimonial Evidence

d)

Circumstantial Evidence

24.

A cross transfer of evidence between a suspect and victim

a)

Chain of Custody

b)

District Attorney

c)

Locard Exchange principle

25.

fibers composed of polymers packed side by side, which make it stiff and strong.

a)

natural fiber

b)

crystalline

c)

yarn

d)

synthetic fiber

26.

the smallest indivisible unit of a textile, it must be at least 100 times longer than wide.

a)

fiber

b)

yarn

c)

textile

d)

monomer

27.

a small molecule that may bond to other monomers to become a polymer.

a)

textile

b)

polymer

c)

monomer

d)

crystalline

28.

Most commonly used synthetic fiber

a)

rayon

b)

nylon

c)

polyester

d)

spandex

29.

A fiber is usually made up of many _______________ twisted or bonded together to form a thread or yarn.

a)

fabrics

b)

filaments

c)

warps

d)

weaves

30.

Which is not a common source of fiber evidence? Fibers from...

a)

clothing

b)

carpet

c)

curtains

d)

seatbelts

31.

One of the first synthetic fibers made of wood.

a)

rayon

b)

nylon

c)

polyester

d)

spandex

32.

First synthetic fiber that is strong and elastic; used in bookbags, athletic shoes, swimsuits, etc.

a)

rayon

b)

nylon

c)

polyester

d)

spandex

33.

An often used natural fiber that is a vegetable fiber; strong, tough, flexible, moisture-absorbent, not shape-retentive

a)

wool

b)

cotton

c)

nylon

d)

silk

34.

A ______________ is the lengthwise yarn and the __________ is the crosswise yarn that goes over and under to form a weave pattern.

a)

warp; weft

b)

weft; warp

c)

weave; warp

d)

warp; weave

35.

The weave pattern shown is...

a)

plain

b)

twill

c)

satin

d)

knitted

36.

The most common weave pattern is

a)

plain

b)

twill

c)

satin

d)

knitted

37.

The weave pattern shown is...

a)

plain

b)

twill

c)

satin

d)

knitted

38.

Twill weave pattern is most commonly found in what type of clothing?

a)

jeans

b)

hoodie

c)

cotton tshirt

d)

sweaters

39.

This weave pattern is known as...

a)

plain

b)

twill

c)

satin

d)

knitted

40.

What kind of weave pattern is shown?

a)

twill

b)

satin

c)

knitted

d)

loops

41.

This fiber is most likely

a)

nylon

b)

polyester

c)

cotton

d)

wool

42.

This fiber is most likely...

a)

cotton

b)

hemp

c)

rayon

d)

impossible to tell

43.

Which is NOT an animal fiber?

a)

hemp

b)

mohair

c)

angora

d)

wool

44.

Synthetic fibers are made from

a)

petroleum and natural gas

b)

minerals and rock

c)

mined metals and ore

d)

chemically altered plant and animal matter

45.

What categories can we divide natural fibers into?

a)

fibers of animal, cellulose, and mineral

b)

fibers of animal and cellulose only

c)

fibers of natural gases and cellulose

d)

fibers of petroleum, animal, and mineral

46.

A fiber created by certain insect larvae when they form their cocoons.

a)

hemp

b)

silk

c)

acrylic

d)

mohair

47.

Synthetic polymer fibers, which all originate with petroleum products, are cellulose-based fibers.

a)

True

b)

False

48.

A disadvantage of manufactured fibers is that they can deteriorate in bright sunlight and melt at a lower temperature than natural fibers.

a)

True

b)

False

49.

Fibers are woven into textiles or fabrics.

a)

True

b)

False

50.

A forensic scientist will ask questions about:

a)

type of fiber.

b)

number of fibers found.

c)

textile from which fiber originated.

d)

fiber color.

e)

where the fiber was found.

51.

One seed fiber is:

a)

cotton.

b)

hemp.

c)

jute.

d)

coir.

52.

Fiberglass is a fiber form of:

a)

proteins.

b)

cellulose.

c)

glass.

d)

polymers.

53.

The number of threads that are packed together for any given amount of fabric is known as ___________.

a)

abaca

b)

linen

c)

thread count

d)

satin

e)

tabby

54.

Which of the following is type of fiber seen below. Hint: it is the most common natural fiber?

a)

COTTON

b)

WOOL

c)

HEMP

d)

POLYESTER

55.

What is this?

a)

animal hair

b)

human hair

c)

fiber

56.

The useful chemical material contained in plant fibers is

a)

cellulite

b)

lignin

c)

cellulose

d)

acid

57.

Which of the following is NOT a characteristic of this twill pattern.

a)

Very strong

b)

Easily distorted when washing

c)

soft

d)

Diagonal design

58.

Which characteristic IS true of the Plain weave pattern?

a)

does not tend to wrinkle

b)

does tend wrinkle

c)

snags easily

d)

not very durable

59.

Which type of fiber is shown?

a)

wool

b)

rayon

c)

cotton

d)

nylon

60.

Which type of fiber is shown?

a)

wool

b)

silk

c)

cotton

d)

rayon

61.

One weft crosses over three or more warp threads describes which weave pattern?

a)

Plain

b)

Basket

c)

Twill

d)

Satin

62.

Alternating warp and weft threads describe which weave pattern?

a)

Plain

b)

Basket

c)

Twill

d)

Satin

63.

On weaving patterns, they consist of arranging lengthwise threads that are side by side and close together. This is called?

a)

weaving

b)

warp

c)

weft

d)

none

64.

On weaving patterns, there crosswise threads and then pushed back and forth in a specific pattern. This is called?

a)

weaving

b)

warp

c)

weft

d)

none

65.

Mineral fibers such as asbestos are very durable. These fibers have been used in allo of the following except

a)

rope

b)

shingles

c)

floor tiles

d)

brake lining

66.

The shiny nature of silk can be related to

a)

its hollow core

b)

its ability to reflect light

c)

its smooth, round fibers

d)

mucus secretions from the silkworm

67.
Which of the following is made of natural polymers?
a)
Plastic
b)
Nylon
c)
Starch
d)
Paint
68.

A compound microscope that allows the side-by-side comparison of samples.

a)

Comparison Microscope

b)

Analytical Microscope

c)

Simple Microscope

69.
Asbestos and fiberglass are classified as ________ fibers
a)
natural
b)
synthetic
c)
regenerated
d)
polymer
70.

Which of the following is a synthetic fiber?

a)

rayon

b)

silk

c)

cashmere

d)

polyester

71.
In a burn test, these fibers will often shrink back away from the flame.
a)
Synthetic
b)
Natural
72.
Destructive methods such as burning and dissolving in acids are the best way to identify fibers:
a)
true 
b)
false
73.
Demolition of a building could release the most damaging form of this fiber:
a)
fiberglass
b)
coir
c)
asbestos
d)
hemp
74.
The fiber that was considered by some to be unique in the Atlanta Child Murders case was:
a)
dog hair
b)
green trilobal from carpet
c)
car fibers from Williams floormats
d)
african american hair
75.

What is a characteristic of Nylon?

a)

draws away from the the heat of a flame

b)

Easily broken down by light and concentrated acid

c)

"balls" up easily

d)

no affect

76.

Which fiber under a microscope has a hollow core that is not always visible?

a)

cotton

b)

flax

c)

silk

d)

wool

77.

Under a microscope, this fiber has a "bamboo stick" appearance

a)

cotton

b)

flax

c)

wool

d)

silk

78.

Which synthetic fiber below is a substitute for fur?

a)

Olefins

b)

Polyester

c)

Nylon

d)

Acrylic

79.

Which weave pattern below is easy to snag?

a)

Plain

b)

Basket

c)

Satin

d)

Twill

80.

This open weave stretches in only one direction.

a)

Tabby

b)

Basket

c)

Twill

d)

Leno

81.

Cashmere, a natural fiber is derived from

a)

rabbits

b)

alpacas

c)

goats

d)

caterpillars

82.

Which of the following fiber(s) smell like hair burning?

a)

cotton

b)

silk

c)

wool

d)

rayon

83.

When burned, wool forms

a)

black residue

b)

a hard bead

c)

gray fluffy ash

d)

wool is fire resistant

84.

Which fiber is self extinguishing, so pajamas are great to be made of this fiber

a)

cotton

b)

rayon

c)

polyester

85.

Collecting fibers with __________ is critical?

a)

1 hr

b)

12 hrs

c)

24 hrs

d)

48 hrs

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