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Bridge Coatings Inspector Program (BCI) Level 1
Exam Actual Test Questions and Correct Answers
With Rationales
Exam Coverage – BCI Level 1 (Short Point Form)
• Coatings basics: types, components, curing mechanisms
• Surface preparation: SSPC/NACE standards, abrasives, profiles, contaminants
• Inspection tools & methods: DFT, adhesion, environmental, soluble salts
• Coating application: spray, brush/roller, wet film thickness
• Safety & environmental: confined space, PPE, VOC, waste disposal
• Quality control & documentation: daily reports, hold points, non-conformances
• Substrate defects & coating failures: rust grades, blistering, delamination
• Standards & specifications: SSPC, ISO, ASTM, AASHTO, owner documents
1. Which SSPC standard specifies “Commercial Blast Cleaning”?
A) SSPC-SP 1
B) SSPC-SP 6
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C) SSPC-SP 10
D) SSPC-SP 5
Answer: B
*Rationale: SSPC-SP 6 (NACE No. 3) is Commercial Blast Cleaning, leaving 2/3 of each square inch of
surface with staining only. SP 1 is solvent cleaning, SP 10 is near-white, SP 5 is white metal.*
2. What is the minimum surface temperature above the dew point typically required before coating
application?
A) 0°F
B) 3°F (1.7°C)
C) 5°F (2.8°C)
D) 10°F
Answer: B
Rationale: Most specifications require the surface temperature to be at least 3°F (1.7°C) above the dew
point to prevent moisture condensation that could cause blistering or adhesion loss.
3. A coating inspector finds rust grade B on a steel bridge girder (ISO 8501-1). What does this indicate?
A) Rust completely covered by mill scale
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B) Mill scale beginning to crack
C) Mill scale rusted away, slight pitting visible
D) Mill scale completely gone, general rusting
Answer: C
*Rationale: ISO 8501-1 rust grade B = mill scale has begun to rust and flake, some pitting visible. Grade A
= intact mill scale, Grade C = mill scale rusted with minor pitting, Grade D = general rusting with visible
pitting.*
4. Which dry film thickness (DFT) gauge uses magnetic induction principle?
A) Eddy current
B) Ultrasonic
C) Magnetic pull-off
D) Micrometer
Answer: C
Rationale: Magnetic pull-off (e.g., Type 1) and magnetic induction (Type 2) work on ferrous substrates.
Eddy current is for non-ferrous; ultrasonic for non-metallic coatings on metal.
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5. In a wet film thickness (WFT) measurement using a notched gauge, if the coating “wets” the 12 mil
notch but not the 14 mil notch, the WFT is:
A) 10 mils
B) 12 mils
C) 13 mils
D) 14 mils
Answer: B
*Rationale: WFT is the highest notch that is wet. The coating wets the 12 mil notch, so WFT = 12 mils.
The inspector should report the last wet notch.*
6. What is the primary function of a corrosion inhibitor in a primer?
A) Increase viscosity
B) Slow down electrochemical corrosion
C) Improve color retention
D) Reduce surface tension
Answer: B
Rationale: Corrosion inhibitors (e.g., zinc phosphate) chemically interfere with anodic/cathodic reactions,
slowing corrosion. They do not primarily affect viscosity, color, or surface tension.
Bridge Coatings Inspector Program (BCI) Level 1
Exam Actual Test Questions and Correct Answers
With Rationales
Exam Coverage – BCI Level 1 (Short Point Form)
• Coatings basics: types, components, curing mechanisms
• Surface preparation: SSPC/NACE standards, abrasives, profiles, contaminants
• Inspection tools & methods: DFT, adhesion, environmental, soluble salts
• Coating application: spray, brush/roller, wet film thickness
• Safety & environmental: confined space, PPE, VOC, waste disposal
• Quality control & documentation: daily reports, hold points, non-conformances
• Substrate defects & coating failures: rust grades, blistering, delamination
• Standards & specifications: SSPC, ISO, ASTM, AASHTO, owner documents
1. Which SSPC standard specifies “Commercial Blast Cleaning”?
A) SSPC-SP 1
B) SSPC-SP 6
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C) SSPC-SP 10
D) SSPC-SP 5
Answer: B
*Rationale: SSPC-SP 6 (NACE No. 3) is Commercial Blast Cleaning, leaving 2/3 of each square inch of
surface with staining only. SP 1 is solvent cleaning, SP 10 is near-white, SP 5 is white metal.*
2. What is the minimum surface temperature above the dew point typically required before coating
application?
A) 0°F
B) 3°F (1.7°C)
C) 5°F (2.8°C)
D) 10°F
Answer: B
Rationale: Most specifications require the surface temperature to be at least 3°F (1.7°C) above the dew
point to prevent moisture condensation that could cause blistering or adhesion loss.
3. A coating inspector finds rust grade B on a steel bridge girder (ISO 8501-1). What does this indicate?
A) Rust completely covered by mill scale
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B) Mill scale beginning to crack
C) Mill scale rusted away, slight pitting visible
D) Mill scale completely gone, general rusting
Answer: C
*Rationale: ISO 8501-1 rust grade B = mill scale has begun to rust and flake, some pitting visible. Grade A
= intact mill scale, Grade C = mill scale rusted with minor pitting, Grade D = general rusting with visible
pitting.*
4. Which dry film thickness (DFT) gauge uses magnetic induction principle?
A) Eddy current
B) Ultrasonic
C) Magnetic pull-off
D) Micrometer
Answer: C
Rationale: Magnetic pull-off (e.g., Type 1) and magnetic induction (Type 2) work on ferrous substrates.
Eddy current is for non-ferrous; ultrasonic for non-metallic coatings on metal.
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5. In a wet film thickness (WFT) measurement using a notched gauge, if the coating “wets” the 12 mil
notch but not the 14 mil notch, the WFT is:
A) 10 mils
B) 12 mils
C) 13 mils
D) 14 mils
Answer: B
*Rationale: WFT is the highest notch that is wet. The coating wets the 12 mil notch, so WFT = 12 mils.
The inspector should report the last wet notch.*
6. What is the primary function of a corrosion inhibitor in a primer?
A) Increase viscosity
B) Slow down electrochemical corrosion
C) Improve color retention
D) Reduce surface tension
Answer: B
Rationale: Corrosion inhibitors (e.g., zinc phosphate) chemically interfere with anodic/cathodic reactions,
slowing corrosion. They do not primarily affect viscosity, color, or surface tension.
