Before the 20th century, all fibers were:
A) Natural.
B) Regenerated.
C) Synthetic.
D) Derived.
Correct Answer:
Verified
Q19: Beard hairs are coarse and normally _
Q20: What is refraction? How does the refractive
Q21: A regenerated fiber can be derived from:
A)Polyester.
B)Cellulose.
C)Rayon.
D)Acetate.
Q22: If a hair does not have a
Q23: The presence of sheath cells on hair
Q25: Which would involve determining the refractive index
Q26: When collecting fiber evidence, great care should
Q27: Which is NOT a synthetic fiber?
A)Rayon
B)Polyester
C)Acrylic
D)All of
Q28: What was the first man-made fiber?
A)Nylon
B)Polyester
C)Acetate
D)Rayon
Q29: The visible light microspectrophotometer is a convenient
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