NACE CIP 1 CBT Exam Complete Questions And Correct
Answers| 2026/2027 Updated — 180 Questions and Answers
Already Graded A+ Premium Exam Tested And Verified
Subject Area Corrosion Prevention and Control
Description This exam covers advanced principles of corrosion prevention and control,
including coating systems, surface preparation, inspection techniques, and failure
analysis, aligned with NACE CIP Level 1 standards for US university-level
certification.
Expected Grade A+
Total Questions 50
Duration 3 hours
Learning Outcomes 1. Analyze corrosion mechanisms and select appropriate prevention strategies.
2. Evaluate coating systems and surface preparation methods for diverse
environments.
3. Interpret inspection data and diagnose coating failures using industry standards.
4. Apply NACE and ISO standards to real-world corrosion control scenarios.
Accreditation This exam meets the rigorous academic and professional standards of top US R1
universities and NACE International certification requirements.
Page 1
,1. In a cathodic protection system for a buried steel pipeline, which of the following
conditions would most likely cause hydrogen embrittlement in high-strength steel?
A. Anodic polarization exceeding the passivation potential
B. Cathodic polarization to potentials more negative than -1.0 V vs. Cu/CuSO4
C. Application of a zinc sacrificial anode with low driving voltage
D. Use of an impressed current system with graphite anodes
Answer: B. Cathodic polarization to potentials more negative than -1.0 V vs.
Cu/CuSO4
Hydrogen embrittlement occurs when cathodic protection potentials are too negative
(e.g., below -1.0 V vs. Cu/CuSO4), generating atomic hydrogen that diffuses into the
steel. Option A describes anodic conditions; options C and D do not typically produce
such negative potentials.
2. During inspection of a coating system applied over a blast-cleaned surface, you
observe 'spot rusting' at several locations. The specification required a near-white
metal blast cleaning (SSPC-SP10/NACE No. 2). Which of the following is the most
likely cause?
A. Excessive soluble salts left on the surface after blasting
B. Insufficient surface profile depth (less than 1.5 mils)
C. Application of the primer beyond the maximum recoat time
D. Use of an incompatible thinner in the coating
Answer: A. Excessive soluble salts left on the surface after blasting
Spot rusting after blasting typically indicates residual soluble salts (e.g., chlorides) that
promote underfilm corrosion. Option B affects adhesion but not immediate rusting;
options C and D cause intercoat adhesion failures, not isolated rust spots.
Page 2
,3. A coating inspector measures the wet film thickness (WFT) of a coating applied by
spray. The specification requires a dry film thickness (DFT) of 10 mils. The coating
has a volume solids content of 65%. What is the minimum acceptable WFT (in mils)
to achieve the required DFT, assuming no thinning?
A. 6.5 mils
B. 10.0 mils
C. 15.4 mils
D. 18.2 mils
Answer: C. 15.4 mils
WFT = DFT / (volume solids / 100) = .65 "H 15.38 mils. Option A incorrectly
multiplies solids by DFT; option B ignores solids; option D assumes a lower solids
content.
4. Which of the following environmental conditions would most likely cause 'solvent
popping' in a freshly applied high-build epoxy coating?
A. Low humidity and high wind speed during application
B. Substrate temperature 5°F above the dew point
C. Rapid solvent evaporation from the coating surface due to high temperature
D. Application over a damp substrate with high ambient humidity
Answer: C. Rapid solvent evaporation from the coating surface due to high
temperature
Solvent popping occurs when the coating surface dries too quickly, trapping solvents
that later erupt. High temperature accelerates surface drying. Option A reduces solvent
retention; option B is acceptable; option D causes blistering from moisture, not solvent
popping.
Page 3
, 5. A coating failure analysis reveals extensive blistering and loss of adhesion in a
tank lining exposed to hot water. The blisters contain a clear liquid with no evidence
of corrosion. The most likely cause is:
A. Cathodic disbondment from an impressed current system
B. Osmotic blistering due to soluble salts on the substrate
C. Solvent entrapment during application
D. Thermal expansion mismatch between coating and substrate
Answer: B. Osmotic blistering due to soluble salts on the substrate
Osmotic blistering occurs when water permeates the coating and dissolves salts on the
substrate, creating osmotic pressure. The clear liquid and absence of corrosion point to
osmotic rather than cathodic or solvent blistering. Option A would show alkaline
corrosion; option C would have solvent odor; option D causes cracking, not blisters.
6. When using a magnetic pull-off gauge to measure dry film thickness on a steel
substrate, which of the following factors would most significantly affect the accuracy
of the reading?
A. The gauge is calibrated on a smooth glass plate
B. The substrate thickness is less than 0.25 inches
C. The ambient temperature is 90°F
D. The coating is non-magnetic
Answer: A. The gauge is calibrated on a smooth glass plate
Magnetic pull-off gauges must be calibrated on the same substrate material and surface
finish as the test piece. Calibration on glass (non-magnetic) will yield inaccurate
readings on steel. Option B (thin substrate) can affect readings but is less significant
than incorrect calibration; options C and D have minimal effect.
Page 4
Answers| 2026/2027 Updated — 180 Questions and Answers
Already Graded A+ Premium Exam Tested And Verified
Subject Area Corrosion Prevention and Control
Description This exam covers advanced principles of corrosion prevention and control,
including coating systems, surface preparation, inspection techniques, and failure
analysis, aligned with NACE CIP Level 1 standards for US university-level
certification.
Expected Grade A+
Total Questions 50
Duration 3 hours
Learning Outcomes 1. Analyze corrosion mechanisms and select appropriate prevention strategies.
2. Evaluate coating systems and surface preparation methods for diverse
environments.
3. Interpret inspection data and diagnose coating failures using industry standards.
4. Apply NACE and ISO standards to real-world corrosion control scenarios.
Accreditation This exam meets the rigorous academic and professional standards of top US R1
universities and NACE International certification requirements.
Page 1
,1. In a cathodic protection system for a buried steel pipeline, which of the following
conditions would most likely cause hydrogen embrittlement in high-strength steel?
A. Anodic polarization exceeding the passivation potential
B. Cathodic polarization to potentials more negative than -1.0 V vs. Cu/CuSO4
C. Application of a zinc sacrificial anode with low driving voltage
D. Use of an impressed current system with graphite anodes
Answer: B. Cathodic polarization to potentials more negative than -1.0 V vs.
Cu/CuSO4
Hydrogen embrittlement occurs when cathodic protection potentials are too negative
(e.g., below -1.0 V vs. Cu/CuSO4), generating atomic hydrogen that diffuses into the
steel. Option A describes anodic conditions; options C and D do not typically produce
such negative potentials.
2. During inspection of a coating system applied over a blast-cleaned surface, you
observe 'spot rusting' at several locations. The specification required a near-white
metal blast cleaning (SSPC-SP10/NACE No. 2). Which of the following is the most
likely cause?
A. Excessive soluble salts left on the surface after blasting
B. Insufficient surface profile depth (less than 1.5 mils)
C. Application of the primer beyond the maximum recoat time
D. Use of an incompatible thinner in the coating
Answer: A. Excessive soluble salts left on the surface after blasting
Spot rusting after blasting typically indicates residual soluble salts (e.g., chlorides) that
promote underfilm corrosion. Option B affects adhesion but not immediate rusting;
options C and D cause intercoat adhesion failures, not isolated rust spots.
Page 2
,3. A coating inspector measures the wet film thickness (WFT) of a coating applied by
spray. The specification requires a dry film thickness (DFT) of 10 mils. The coating
has a volume solids content of 65%. What is the minimum acceptable WFT (in mils)
to achieve the required DFT, assuming no thinning?
A. 6.5 mils
B. 10.0 mils
C. 15.4 mils
D. 18.2 mils
Answer: C. 15.4 mils
WFT = DFT / (volume solids / 100) = .65 "H 15.38 mils. Option A incorrectly
multiplies solids by DFT; option B ignores solids; option D assumes a lower solids
content.
4. Which of the following environmental conditions would most likely cause 'solvent
popping' in a freshly applied high-build epoxy coating?
A. Low humidity and high wind speed during application
B. Substrate temperature 5°F above the dew point
C. Rapid solvent evaporation from the coating surface due to high temperature
D. Application over a damp substrate with high ambient humidity
Answer: C. Rapid solvent evaporation from the coating surface due to high
temperature
Solvent popping occurs when the coating surface dries too quickly, trapping solvents
that later erupt. High temperature accelerates surface drying. Option A reduces solvent
retention; option B is acceptable; option D causes blistering from moisture, not solvent
popping.
Page 3
, 5. A coating failure analysis reveals extensive blistering and loss of adhesion in a
tank lining exposed to hot water. The blisters contain a clear liquid with no evidence
of corrosion. The most likely cause is:
A. Cathodic disbondment from an impressed current system
B. Osmotic blistering due to soluble salts on the substrate
C. Solvent entrapment during application
D. Thermal expansion mismatch between coating and substrate
Answer: B. Osmotic blistering due to soluble salts on the substrate
Osmotic blistering occurs when water permeates the coating and dissolves salts on the
substrate, creating osmotic pressure. The clear liquid and absence of corrosion point to
osmotic rather than cathodic or solvent blistering. Option A would show alkaline
corrosion; option C would have solvent odor; option D causes cracking, not blisters.
6. When using a magnetic pull-off gauge to measure dry film thickness on a steel
substrate, which of the following factors would most significantly affect the accuracy
of the reading?
A. The gauge is calibrated on a smooth glass plate
B. The substrate thickness is less than 0.25 inches
C. The ambient temperature is 90°F
D. The coating is non-magnetic
Answer: A. The gauge is calibrated on a smooth glass plate
Magnetic pull-off gauges must be calibrated on the same substrate material and surface
finish as the test piece. Calibration on glass (non-magnetic) will yield inaccurate
readings on steel. Option B (thin substrate) can affect readings but is less significant
than incorrect calibration; options C and D have minimal effect.
Page 4
