Corrosion Engineering MCQ

Corrosion Engineering MCQ is designed to help students, engineers, and competitive exam aspirants strengthen their understanding of corrosion mechanisms, prevention techniques, and material protection methods. This quiz covers essential topics such as electrochemical corrosion, galvanic corrosion, pitting, stress corrosion cracking, oxidation, corrosion inhibitors, cathodic and anodic protection, protective coatings, material selection, and corrosion testing methods. These multiple-choice questions are useful for Mechanical Engineering, Chemical Engineering, Metallurgical Engineering, Civil Engineering, GATE, SSC JE, RRB JE, PSU, and university examinations. Each question includes the correct answer and a detailed explanation to improve conceptual clarity and problem-solving skills. Regular practice with these Corrosion Engineering MCQs helps enhance technical knowledge, boosts confidence, and prepares candidates for academic exams, interviews, and professional certification tests. Start practicing now to master corrosion engineering concepts and improve your exam performance with high-quality, exam-oriented questions.

Q1. What is corrosion?

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Q2. Which type of corrosion is most difficult to detect?

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Q3. Pilling-Bedworth Ratio (PBR) less than 1 indicates:

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Q4. Galvanic corrosion occurs when:

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Q5. What is the anodic reaction in corrosion?

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Q6. Cathodic protection involves:

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Q7. Which metal corrodes preferentially and protects other metals when connected?

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Q8. Crevice corrosion is caused due to:

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Q9. Passivation refers to:

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Q10. Which of following is a common corrosion inhibitor?

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Q11. The rate of corrosion depends on:

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Q12. Corrosion resulting in uniform thinning over entire surface is:

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Q13. What is the effect of increasing oxygen concentration on corrosion?

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Q14. Electrochemical corrosion requires:

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Q15. Stress corrosion cracking occurs due to:

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Q16. Which of the following is a method to prevent corrosion?

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Q17. Rust is primarily:

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Q18. Sacrificial anode cathodic protection mainly uses which metal?

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Q19. Passivating metals include:

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Q20. Which process measures corrosion rate?

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Q21. Galvanic series is:

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Q22. Corrosion inhibitors work by:

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Q23. Pitting corrosion is:

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Q24. Stress corrosion cracking primarily affects:

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Q25. Which layer protects stainless steel from corrosion?

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Q26. Cathodic protection is commonly used on:

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Q27. Impressed current cathodic protection requires:

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Q28. Corrosion potential difference between two metals causes:

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Q29. Which corrosion type involves microbial activity?

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Q30. Stress corrosion cracks often initiate at:

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Q31. Metal passivation creates:

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Q32. Cyclic polarization curves are used to study:

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Q33. Which condition accelerates corrosion?

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Q34. Role of oxygen in aqueous corrosion is:

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Q35. Electrochemical corrosion cell requires:

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Q36. Corrosion scale formation can:

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Q37. Which is an effective rust prevention method?

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Q38. Electrochemical corrosion is reversible?

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Q39. Oxidation occurs at:

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Q40. Which is commonly used to measure corrosion rate?

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