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Automotive Paint and Soil Evidence Quiz

Total questions: 55

Worksheet time: 28mins

Name
Class
Date
1.

Which layer of automotive paint provides color?

a)

Primer

b)

Basecoat

c)

Clearcoat

d)

Electrocoat

2.

Which layer provides corrosion resistance in automotive paint?

a)

Clearcoat

b)

Electrocoat primer

c)

Basecoat

d)

Surfacer

3.

The topmost layer in automotive paint system is:

a)

Basecoat

b)

Primer

c)

Clearcoat

d)

Electrocoat

4.

Which instrument is widely used for elemental analysis of paint?

a)

FTIR

b)

SEM-EDX

c)

GC-MS

d)

TLC

5.

Pyrolysis-GC is mainly used for analyzing which component of paint?

a)

Pigment

b)

Binder

c)

Filler

d)

Solvent

6.

Which pigment is responsible for white color in paint?

a)

Zinc oxide

b)

Titanium dioxide

c)

Lead chromate

d)

Carbon black

7.

Which of the following is NOT a component of paint?

a)

Pigment

b)

Binder

c)

Catalyst

d)

Solvent

8.

Paint chips should be collected in:

a)

Airtight plastic bags

b)

Paper folds

c)

Wet cotton

d)

Polythene

9.

Which technique is used to study the layer sequence of paint?

a)

TLC

b)

Microscopy

c)

GC-MS

d)

Py-GC

10.

The database for automotive paint maintained by RCMP is called:

a)

PDQ

b)

CODIS

c)

AFIS

d)

NIBIN

11.

Which property is useful for preliminary examination of paint?

a)

Elemental composition

b)

Layer sequence

c)

Color and texture

d)

Refractive index

12.

Which of these is an inorganic pigment?

a)

Alkyd resin

b)

Titanium dioxide

c)

Nitrocellulose

d)

Acrylic polymer

13.

Which solvent-based paint binder is most common?

a)

Alkyd resin

b)

Epoxy resin

c)

Polyurethane

d)

All of the above

14.

Paint evidence is usually considered:

a)

Class evidence

b)

Individual evidence

c)

Trace evidence

d)

Both a and c

15.

Which instrument measures absorbance in paint comparison?

a)

Spectrophotometer

b)

GC

c)

XRF

d)

SEM

16.

Which colorant imparts red color to paint?

a)

Ferric oxide

b)

Lead chromate

c)

Carbon black

d)

Zinc oxide

17.

Which method is NOT used for paint analysis?

a)

FTIR

b)

Py-GC

c)

HPLC

d)

PCR

18.

Clearcoat in automotive paint mainly provides:

a)

Corrosion resistance

b)

Gloss and UV protection

c)

Adhesion to metal

d)

Pigmentation

19.

Which component gives adhesion to paint?

a)

Binder

b)

Pigment

c)

Filler

d)

Solvent

20.

For microscopic comparison, paint fragments are mounted in:

a)

Distilled water

b)

Resin

c)

Agar gel

d)

Ethanol

21.

Which organization maintains the PDQ database?

a)

FBI

b)

INTERPOL

c)

RCMP

d)

NIST

22.

What is the purpose of primer surfacer in automotive paint?

a)

Gloss

b)

Adhesion and leveling

c)

Color

d)

Corrosion resistance

23.

Which spectroscopy method is most used for binder analysis?

a)

IR spectroscopy

b)

UV spectroscopy

c)

Raman spectroscopy

d)

X-ray fluorescence

24.

Which of the following is an organic binder?

a)

Epoxy resin

b)

Calcium carbonate

c)

Titanium dioxide

d)

Zinc oxide

25.

Which microscopic technique helps in determining layer sequence?

a)

Polarized light microscopy

b)

Electron diffraction

c)

Scanning tunneling microscopy

d)

Atomic force microscopy

26.

The major mineral component of sand in soil is:

a)

Quartz

b)

Feldspar

c)

Calcite

d)

Mica

27.

Soil texture refers to:

a)

Color of soil

b)

Relative proportions of sand, silt, clay

c)

Organic content

d)

Mineral composition only

28.

Which instrument is commonly used for elemental analysis of soil?

a)

XRF

b)

GC-MS

c)

UV-Vis

d)

TLC

29.

Which factor most affects soil color?

a)

pH

b)

Organic matter and moisture

c)

Mineral composition only

d)

Particle size

30.

Which technique helps identify mineral content in soil?

a)

XRD

b)

FTIR

c)

SEM

d)

GC

31.

Soil pH is measured using:

a)

Spectrophotometer

b)

pH meter

c)

XRF

d)

Conductivity meter

32.

Which of the following is NOT a physical property of soil?

a)

Color

b)

Texture

c)

Density

d)

pH

33.

Which is the most fertile soil type?

a)

Sandy

b)

Loamy

c)

Clay

d)

Silt

34.

The density gradient method for soil analysis is based on:

a)

Moisture

b)

Particle size

c)

Specific gravity

d)

Color

35.

Which component gives soil its dark color?

a)

Minerals

b)

Organic matter (humus)

c)

Clay

d)

Water

36.

Which instrument helps in detecting trace pollen in soil?

a)

SEM

b)

Light microscope

c)

GC-MS

d)

XRF

37.

Which property is most useful for forensic soil comparison?

a)

pH only

b)

Mineral composition

c)

Color only

d)

Weight only

38.

Soil evidence is usually classified as:

a)

Class evidence

b)

Individual evidence

c)

Biological evidence

d)

Both a and b

39.

Which soil particle is the smallest?

a)

Sand

b)

Clay

c)

Silt

d)

Gravel

40.

Which analysis technique gives elemental composition of soil?

a)

XRF

b)

FTIR

c)

UV

d)

GC

41.

Soil density gradient analysis uses:

a)

Organic solvents

b)

Glass tubes with varying densities

c)

TLC plates

d)

Microscopy slides

42.

Which property differentiates soils from two locations most reliably?

a)

pH

b)

Color

c)

Mineral content and particle size

d)

Moisture

43.

The most common forensic use of soil is in:

a)

Gunshot residue analysis

b)

Linking suspect to crime scene

c)

Identifying time of death

d)

Fiber transfer

44.

Which test helps determine soil organic content?

a)

Loss on ignition

b)

XRF

c)

FTIR

d)

GC

45.

Which mineral gives reddish color to soil?

a)

Ferric oxide

b)

Quartz

c)

Calcite

d)

Gypsum

46.

Which property of soil is least reliable for comparison?

a)

Color

b)

Mineral composition

c)

Texture

d)

Layer sequence

47.

The first step in soil examination is:

a)

XRF analysis

b)

Visual inspection

c)

Density gradient analysis

d)

Particle size analysis

48.

Soil sample collection from shoes should be done by:

a)

Washing with water

b)

Scraping carefully and storing in paper folds

c)

Sealing shoes in plastic

d)

Using solvents

49.

Which of these is NOT a factor in soil formation?

a)

Parent rock

b)

Climate

c)

Human

d)

Organisms

50.

Which property of soil is measured using sieve test?

a)

pH

b)

Particle size distribution

c)

Moisture

d)

Mineral composition

51.

What is the primary purpose of a clearcoat in automotive paint?

a)

To provide color

b)

To act as a primer

c)

To enhance gloss and protect the basecoat

d)

To improve adhesion

52.

Which type of paint evidence is most likely to be unique to a specific manufacturer?

a)

Class evidence

b)

Individual evidence

c)

Trace evidence

d)

None of the above

53.

Which method is commonly used to determine the moisture content in soil?

a)

Microscopic method

b)

Volumetric method

c)

Colorimetric method

d)

Gravimetric method

54.

What is the primary purpose of a soil auger?

a)

To determine soil density

b)

To analyze soil moisture

c)

To collect soil samples

d)

To measure soil pH

55.

Which method is commonly used to analyze the chemical (volatile components) composition of paint?

a)

HPLC

b)

FTIR

c)

UV-Vis

d)

GC-MS