MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Corrosion Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is/are the preventions of stress-corrosion cracking? |
| A. | Lowering working stress below the threshold value |
| B. | Shot peening to produce residual compressive stresses |
| C. | Applying for cathodic protection |
| D. | Lowering working stress below the threshold value, shot peening to produce residual compressive stresses and applying for cathodic protection |
| Answer» E. | |
| 2. |
Which of the following stress-corrosion cracking mechanism is highly acceptable? |
| A. | Dissolution mechanics |
| B. | Mechanical mechanics |
| C. | Both dissolution and mechanical mechanics |
| D. | Hydrogen mechanics |
| Answer» B. Mechanical mechanics | |
| 3. |
Which of the following type of stress has an important role in rupturing protective films during both the initiation and propagation of cracks? |
| A. | Tensile stress |
| B. | Compressive stress |
| C. | Shear stress |
| D. | Compressive and shear stress |
| Answer» B. Compressive stress | |
| 4. |
Which of the following is/are the metallurgical factors that affect stress-corrosion cracking? |
| A. | Chemical composition |
| B. | Distribution of precipitates |
| C. | Dislocation interactions |
| D. | Chemical composition, distribution of precipitates and dislocation interactions |
| Answer» E. | |
| 5. |
Which of the following is/are the environments that cause stress-corrosion cracking to titanium? |
| A. | Red fuming nitric acid |
| B. | Methanol-HCl |
| C. | Nitrogen tetroxide (N<sub>2</sub>O<sub>4</sub>) |
| D. | Red fuming nitric acid, methanol-HCl, and nitrogen tetroxide |
| Answer» E. | |
| 6. |
As stress-corrosion cracks penetrate the material, the cross-sectional area gets reduced under constant tensile load. |
| A. | False |
| B. | True |
| Answer» C. | |
| 7. |
Define Threshold stress regarding stress-corrosion cracking. |
| A. | The maximum stress at which the specimen ruptures |
| B. | The maximum stress required to prevent cracking |
| C. | The minimum stress required to prevent cracking |
| D. | The minimum stress at which cracking starts |
| Answer» D. The minimum stress at which cracking starts | |
| 8. |
Which of the following alloy in which both intergranular and trans-granular cracking occurs? |
| A. | High-nickel alloys |
| B. | iron-chromium alloys |
| C. | Brasses |
| D. | High-nickel alloys, iron-chromium alloys, and brasses |
| Answer» E. | |
| 9. |
Which of the following is/are the most important variables that affect stress-corrosion cracking? |
| A. | Temperature |
| B. | Metal composition |
| C. | Type and amount of stress applied |
| D. | Temperature, metal composition, and type and amount of stress applied |
| Answer» E. | |
| 10. |
In which of the following environments that stainless steel will undergo stress-corrosion cracking? |
| A. | Chlorides |
| B. | Caustics |
| C. | Ammonia |
| D. | Chlorides and caustics |
| Answer» E. | |
| 11. |
What is meant by caustic embrittlement of steel? |
| A. | Failure of cold-worked rivets by a brittle fracture in the presence of ammonia |
| B. | Failure of cold-worked rivets by a brittle fracture in the presence of caustic soda |
| C. | Failure of cold-worked rivets by a brittle fracture in the presence of caustic soda and ammonia |
| D. | Failure of cold-worked rivets by the cup and cone fracture in the presence of caustic soda |
| Answer» C. Failure of cold-worked rivets by a brittle fracture in the presence of caustic soda and ammonia | |
| 12. |
What is meant by season cracking of brass? |
| A. | Stress-corrosion cracking failure of brass cat ridge cases due to ammonia |
| B. | Stress-corrosion cracking failure of brass cat ridge cases due to caustic soda |
| C. | Stress-corrosion cracking failure of brass cat ridge cases due to caustic soda and ammonia |
| D. | Stress-corrosion cracking failure with brittle fracture |
| Answer» B. Stress-corrosion cracking failure of brass cat ridge cases due to caustic soda | |
| 13. |
Which of the following is/are the classic examples of stress-corrosion cracking? |
| A. | Season cracking of brass |
| B. | Caustic embrittlement of steel |
| C. | Season cracking of brass and caustic embrittlement of steel |
| D. | Neither season cracking of brass nor caustic embrittlement of steel |
| Answer» D. Neither season cracking of brass nor caustic embrittlement of steel | |
| 14. |
Stress-corrosion cracking occurs due to the simultaneous presence of tensile stress and a specific corrosive medium. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
What is the abbreviation of SCC regarding corrosion? |
| A. | Stress-corrosion cracking |
| B. | Stress-cracking corrosion |
| C. | Stress-corrosion contact |
| D. | Stress-contact corrosion |
| Answer» B. Stress-cracking corrosion | |