AMPP C3 Updated Actual Exam Questions
and Correct Answers
1. The primary purpose of surface preparation before coating
application is to:
A. Reduce coating cost
B. Improve adhesion between substrate and coating
C. Remove contaminants and provide a profile for adhesion
D. Reduce corrosion potential
Proper surface preparation removes mill scale, rust, and
contaminants, ensuring optimal coating adhesion and longevity.
2. The SSPC-SP10/NACE No. 2 standard defines which level of surface
cleanliness?
A. Commercial blast cleaning
B. Near-white blast cleaning
C. Brush-off blast cleaning
D. Industrial blast cleaning
SP10/NACE No.2 requires removing nearly all visible contaminants
with only slight staining allowed.
3. When measuring surface profile using replica tape, the
micrometer reading represents:
A. Surface cleanliness
B. Peak-to-valley height of the surface
C. Paint thickness
D. Substrate hardness
, Replica tape captures the roughness impression, and the
micrometer measures the average peak-to-valley height.
4. Which type of corrosion occurs under non-permeable deposits on
metal surfaces?
A. Galvanic corrosion
B. Pitting corrosion
C. Crevice corrosion
D. Erosion corrosion
Crevice corrosion occurs in stagnant areas where oxygen access is
limited beneath deposits or gaskets.
5. Which of the following is a typical environmental condition that
affects coating application?
A. Relative humidity
B. Wind direction
C. Substrate color
D. Worker height
Relative humidity influences coating curing and can lead to
condensation affecting adhesion.
6. The dew point is defined as:
A. The temperature of the surface
B. The ambient air temperature
C. The temperature at which moisture condenses on a surface
D. The curing temperature of the coating
If the surface temperature is at or below the dew point, moisture
condenses, risking coating failure.
7. Which coating type uses zinc dust as a pigment for corrosion
protection?
, A. Epoxy
B. Zinc-rich primer
C. Urethane
D. Vinyl ester
Zinc-rich coatings provide sacrificial protection by galvanic action.
8. What is the most important factor when mixing two-component
coatings?
A. Color uniformity
B. Odor control
C. Correct mix ratio
D. Mixing speed
Incorrect ratios can prevent proper curing and compromise
coating performance.
9. Which type of corrosion occurs when two dissimilar metals are in
contact in an electrolyte?
A. Galvanic corrosion
B. Filiform corrosion
C. Crevice corrosion
D. Uniform corrosion
Galvanic corrosion occurs due to electrical potential difference
between dissimilar metals.
10. The purpose of a stripe coat is to:
A. Save paint material
B. Prevent holidays on flat surfaces
C. Ensure coverage on edges, welds, and irregular areas
D. Improve gloss retention
and Correct Answers
1. The primary purpose of surface preparation before coating
application is to:
A. Reduce coating cost
B. Improve adhesion between substrate and coating
C. Remove contaminants and provide a profile for adhesion
D. Reduce corrosion potential
Proper surface preparation removes mill scale, rust, and
contaminants, ensuring optimal coating adhesion and longevity.
2. The SSPC-SP10/NACE No. 2 standard defines which level of surface
cleanliness?
A. Commercial blast cleaning
B. Near-white blast cleaning
C. Brush-off blast cleaning
D. Industrial blast cleaning
SP10/NACE No.2 requires removing nearly all visible contaminants
with only slight staining allowed.
3. When measuring surface profile using replica tape, the
micrometer reading represents:
A. Surface cleanliness
B. Peak-to-valley height of the surface
C. Paint thickness
D. Substrate hardness
, Replica tape captures the roughness impression, and the
micrometer measures the average peak-to-valley height.
4. Which type of corrosion occurs under non-permeable deposits on
metal surfaces?
A. Galvanic corrosion
B. Pitting corrosion
C. Crevice corrosion
D. Erosion corrosion
Crevice corrosion occurs in stagnant areas where oxygen access is
limited beneath deposits or gaskets.
5. Which of the following is a typical environmental condition that
affects coating application?
A. Relative humidity
B. Wind direction
C. Substrate color
D. Worker height
Relative humidity influences coating curing and can lead to
condensation affecting adhesion.
6. The dew point is defined as:
A. The temperature of the surface
B. The ambient air temperature
C. The temperature at which moisture condenses on a surface
D. The curing temperature of the coating
If the surface temperature is at or below the dew point, moisture
condenses, risking coating failure.
7. Which coating type uses zinc dust as a pigment for corrosion
protection?
, A. Epoxy
B. Zinc-rich primer
C. Urethane
D. Vinyl ester
Zinc-rich coatings provide sacrificial protection by galvanic action.
8. What is the most important factor when mixing two-component
coatings?
A. Color uniformity
B. Odor control
C. Correct mix ratio
D. Mixing speed
Incorrect ratios can prevent proper curing and compromise
coating performance.
9. Which type of corrosion occurs when two dissimilar metals are in
contact in an electrolyte?
A. Galvanic corrosion
B. Filiform corrosion
C. Crevice corrosion
D. Uniform corrosion
Galvanic corrosion occurs due to electrical potential difference
between dissimilar metals.
10. The purpose of a stripe coat is to:
A. Save paint material
B. Prevent holidays on flat surfaces
C. Ensure coverage on edges, welds, and irregular areas
D. Improve gloss retention
