NACE CIP 1 CBT Exam Practice
Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
What is the primary goal of a corrosion control program in industrial systems?
✔✔To prevent or minimize material degradation that could lead to equipment failure, safety
hazards, or environmental damage.
Which factor most influences the rate of corrosion in metals?
✔✔The presence of moisture, oxygen, temperature, and chemical exposure.
Why is pH monitoring important in corrosion prevention?
✔✔Because acidic or highly alkaline environments accelerate corrosion processes.
Which corrosion type is characterized by uniform material loss over a surface?
✔✔General or uniform corrosion.
Why is galvanic corrosion a concern when different metals are in contact?
✔✔Because an electrochemical reaction can accelerate corrosion of the more anodic metal.
Which protective measure prevents galvanic corrosion?
✔✔Electrical isolation, coatings, or using compatible metals.
1
,Why is monitoring dissolved oxygen in water systems important for corrosion control?
✔✔Because high oxygen levels can increase the rate of metal oxidation.
Which technique is commonly used to detect corrosion under insulation (CUI)?
✔✔Ultrasonic testing or radiography.
Why is proper material selection crucial in corrosion prevention?
✔✔Because selecting corrosion-resistant alloys reduces the risk of premature failure.
Which factor can accelerate pitting corrosion in metals?
✔✔Chloride ions or localized chemical attack.
Why are corrosion inhibitors added to industrial water systems?
✔✔To slow down the chemical reactions that cause corrosion.
Which type of corrosion is most likely in stagnant water areas?
✔✔Localized or pitting corrosion.
Why is regular inspection essential in corrosion control programs?
✔✔To detect early signs of corrosion and implement corrective measures.
Which factor contributes to stress corrosion cracking (SCC)?
2
,✔✔Tensile stress combined with a corrosive environment.
Why is coating integrity important for corrosion protection?
✔✔Because damaged coatings allow corrosive agents to reach the metal surface.
Which method is used to measure the thickness of metal loss due to corrosion?
✔✔Ultrasonic thickness testing.
Why is hydrogen embrittlement a concern in high-strength metals?
✔✔Because hydrogen can reduce ductility and cause cracking under stress.
Which environmental factor accelerates atmospheric corrosion of metals?
✔✔High humidity, pollutants, and salt exposure.
Why is proper drainage important in preventing corrosion in industrial equipment?
✔✔Because standing water can increase the rate of localized corrosion.
Which corrosion type occurs between a metal and an oxidizing agent at different points on the
surface?
✔✔Electrochemical or galvanic corrosion.
Why is cathodic protection used in pipelines?
3
, ✔✔To reduce the electrochemical potential and prevent anodic metal loss.
Which corrosion monitoring technique measures electrical potential differences?
✔✔Half-cell potential measurement.
Why is avoiding dissimilar metal contact important in piping systems?
✔✔To prevent galvanic corrosion.
Which factor increases the risk of microbial-induced corrosion (MIC)?
✔✔Presence of bacteria, moisture, and nutrients on metal surfaces.
Why is maintaining proper water chemistry critical in cooling systems?
✔✔To prevent scale, corrosion, and biological growth that damage equipment.
Which type of corrosion affects only a small, localized area of a metal surface?
✔✔Pitting corrosion.
Why is high flow velocity a concern for corrosion in piping systems?
✔✔Because it can cause erosion-corrosion and remove protective films.
Which metal is highly resistant to atmospheric corrosion?
✔✔Stainless steel.
4
Questions and Answers | Latest
Version | 2025/2026 | Correct & Verified
What is the primary goal of a corrosion control program in industrial systems?
✔✔To prevent or minimize material degradation that could lead to equipment failure, safety
hazards, or environmental damage.
Which factor most influences the rate of corrosion in metals?
✔✔The presence of moisture, oxygen, temperature, and chemical exposure.
Why is pH monitoring important in corrosion prevention?
✔✔Because acidic or highly alkaline environments accelerate corrosion processes.
Which corrosion type is characterized by uniform material loss over a surface?
✔✔General or uniform corrosion.
Why is galvanic corrosion a concern when different metals are in contact?
✔✔Because an electrochemical reaction can accelerate corrosion of the more anodic metal.
Which protective measure prevents galvanic corrosion?
✔✔Electrical isolation, coatings, or using compatible metals.
1
,Why is monitoring dissolved oxygen in water systems important for corrosion control?
✔✔Because high oxygen levels can increase the rate of metal oxidation.
Which technique is commonly used to detect corrosion under insulation (CUI)?
✔✔Ultrasonic testing or radiography.
Why is proper material selection crucial in corrosion prevention?
✔✔Because selecting corrosion-resistant alloys reduces the risk of premature failure.
Which factor can accelerate pitting corrosion in metals?
✔✔Chloride ions or localized chemical attack.
Why are corrosion inhibitors added to industrial water systems?
✔✔To slow down the chemical reactions that cause corrosion.
Which type of corrosion is most likely in stagnant water areas?
✔✔Localized or pitting corrosion.
Why is regular inspection essential in corrosion control programs?
✔✔To detect early signs of corrosion and implement corrective measures.
Which factor contributes to stress corrosion cracking (SCC)?
2
,✔✔Tensile stress combined with a corrosive environment.
Why is coating integrity important for corrosion protection?
✔✔Because damaged coatings allow corrosive agents to reach the metal surface.
Which method is used to measure the thickness of metal loss due to corrosion?
✔✔Ultrasonic thickness testing.
Why is hydrogen embrittlement a concern in high-strength metals?
✔✔Because hydrogen can reduce ductility and cause cracking under stress.
Which environmental factor accelerates atmospheric corrosion of metals?
✔✔High humidity, pollutants, and salt exposure.
Why is proper drainage important in preventing corrosion in industrial equipment?
✔✔Because standing water can increase the rate of localized corrosion.
Which corrosion type occurs between a metal and an oxidizing agent at different points on the
surface?
✔✔Electrochemical or galvanic corrosion.
Why is cathodic protection used in pipelines?
3
, ✔✔To reduce the electrochemical potential and prevent anodic metal loss.
Which corrosion monitoring technique measures electrical potential differences?
✔✔Half-cell potential measurement.
Why is avoiding dissimilar metal contact important in piping systems?
✔✔To prevent galvanic corrosion.
Which factor increases the risk of microbial-induced corrosion (MIC)?
✔✔Presence of bacteria, moisture, and nutrients on metal surfaces.
Why is maintaining proper water chemistry critical in cooling systems?
✔✔To prevent scale, corrosion, and biological growth that damage equipment.
Which type of corrosion affects only a small, localized area of a metal surface?
✔✔Pitting corrosion.
Why is high flow velocity a concern for corrosion in piping systems?
✔✔Because it can cause erosion-corrosion and remove protective films.
Which metal is highly resistant to atmospheric corrosion?
✔✔Stainless steel.
4
