MCQOPTIONS
Saved Bookmarks
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 impurity in hydrochloric acid results in pitting corrosion? |
| A. | Ferrous chloride |
| B. | Ferric chloride |
| C. | Potassium chloride |
| D. | Sodium chloride |
| Answer» C. Potassium chloride | |
| 2. |
Which of the following metals will have a high influence on aeration and oxidizing agents in hydrochloric acid? |
| A. | Copper and its alloys |
| B. | Nickel and its alloys |
| C. | Nickel-molybdenum alloys, copper, nickel and their alloys |
| D. | Nickel-molybdenum alloys |
| Answer» D. Nickel-molybdenum alloys | |
| 3. |
Which of the following is/are the class2 corrosion resistance materials in hydrochloric acid? |
| A. | Bronzes and Cupronickels |
| B. | Hastelloy D and Duriron |
| C. | Bronzes, Stainless steels, Bronzes, Cupronickels, Hastelloy D and Duriron |
| D. | Stainless steels and Duriron |
| Answer» D. Stainless steels and Duriron | |
| 4. |
Duriron has better corrosion resistance than Durichlor in hydrochloric acid. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 5. |
Which of the following is/are the class1 corrosion resistance materials in hydrochloric acid? |
| A. | Chlorimet 2 and Chlorimet 3 |
| B. | Hastelloy B and C |
| C. | Zirconium and molybdenum |
| D. | Chlorimet 2 and 3, Hastelloy B and C, Zirconium, Molybdenum and Tantalum |
| Answer» E. | |
| 6. |
Which of the following metal is used for hydrochloric acid to avoid contamination? |
| A. | Titanium |
| B. | Tantalum |
| C. | Molybdenum |
| D. | Cupronickels |
| Answer» C. Molybdenum | |
| 7. |
Which of the following is/are the class3 corrosion-resistant materials in nitric acid? |
| A. | Copper and its alloys |
| B. | Nickel and its alloys |
| C. | Low-alloy steels |
| D. | Low-alloy steels, copper, nickels and their alloys |
| Answer» E. | |
| 8. |
Which of the following polymer has excellent corrosion resistance to nitric acid? |
| A. | Teflon |
| B. | Polyvinyl chloride |
| C. | Polystyrene |
| D. | Polyethylene |
| Answer» B. Polyvinyl chloride | |
| 9. |
Which of the following is/are the class2 corrosion-resistant materials in nitric acid? |
| A. | Aluminum and Stainless steels |
| B. | Aluminum, Hastelloy, and Inconel |
| C. | Hastelloy and Inconel |
| D. | Hastelloy and Titanium |
| Answer» C. Hastelloy and Inconel | |
| 10. |
Which of the following statements is/are true about titanium? |
| A. | It has excellent corrosion resistance to fuming nitric acid |
| B. | It is used as an oxidizer in fuel systems for rockets |
| C. | It has excellent corrosion resistance to fuming nitric acid and it is used as an oxidizer in fuel systems for rockets |
| D. | It doesn t exhibit pyrophoric tendencies in red fuming nitric acid |
| Answer» D. It doesn t exhibit pyrophoric tendencies in red fuming nitric acid | |
| 11. |
What are the principal applications of Duriron? |
| A. | Cast forms of pumps, valves, heat exchangers for chemical plant |
| B. | In manufacturing and handling of nitric acid |
| C. | In the ammonia oxidation process |
| D. | Cast forms of pumps, valves, heat exchangers for chemical plant, in manufacturing and handling of nitric acid and ammonia oxidation process |
| Answer» E. | |
| 12. |
The corrosion resistance of Durichlor to nitric acid is better than that of Duriron. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
Duriron exhibits excellent corrosion resistance in concentrations over 45% at temperatures including boiling. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 14. |
Which of the following steels will have less corrosion rate in boiling 65% nitric acid? |
| A. | 4.5% chromium steel |
| B. | 8% chromium and 8% nickel steel |
| C. | 18% chromium and 8% nickel stainless steel |
| D. | 18% chromium stainless steel |
| Answer» D. 18% chromium stainless steel | |
| 15. |
Which of the following is/are the class1 corrosion resistance materials in nitric acid? |
| A. | High-silicon cast irons |
| B. | Stainless steels (type 430) |
| C. | Titanium |
| D. | High-silicon cast iron, stainless steels, and titanium |
| Answer» E. | |