MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 10 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 metals/alloys passivates spontaneously in acid solutions containing oxidizers or dissolved oxygen? |
| A. | Copper |
| B. | Titanium |
| C. | Stainless steels and titanium |
| D. | Nickel |
| Answer» C. Stainless steels and titanium | |
| 2. |
Which of the following metal doesn’t possess a trans passive region? |
| A. | Iron |
| B. | Titanium |
| C. | Nickel |
| D. | Aluminum |
| Answer» C. Nickel | |
| 3. |
Which of the following statements is/are correct regarding the given schematic? |
| A. | Increase in acid concentration and temperature increase the passive potential |
| B. | Increase in acid concentration and temperature increase critical current density |
| C. | The relative reduction in the size of the passive region |
| D. | Increase in acid concentration and temperature increase critical current density, passive potential and we can observe a relative reduction in the size of the passive region |
| Answer» E. | |
| 4. |
Which of the following is/are the important characteristics of active-passive transitions of a metal? |
| A. | Passive potential (Epp) |
| B. | Critical anodic current density (ic)c) Passive potential (Epp) and Critical anodic current density (i |
| C. | Passive potential (Epp) and Critical anodic current density (ic) |
| D. | Neither passive potential nor critical anodic current density |
| Answer» D. Neither passive potential nor critical anodic current density | |
| 5. |
The Trans passive region is the region in which the corrosion rate increases with an increase in potential. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which of the following is/are correct regarding the active region of metals? |
| A. | Corrosion rates increase exponentially |
| B. | Corrosion rates increase linearly |
| C. | It follows typical Tafel behavior |
| D. | It follows typical Tafel behavior and corrosion rates increases exponentially |
| Answer» E. | |
| 7. |
What is depicted in the given polarization curve? |
| A. | Cathodic dissolution of typical active-passive transition metal |
| B. | Anodic dissolution of typical active-passive transition metal |
| C. | Anodic dissolution of a metal |
| D. | Cathodic dissolution of a metal |
| Answer» C. Anodic dissolution of a metal | |
| 8. |
Which of the following is/are the metal/alloys that demonstrate active-passive transitions? |
| A. | Iron and stainless steels |
| B. | Nickel and its alloys |
| C. | Iron, stainless steels, nickels, titanium, and its alloys |
| D. | Titanium and its alloys |
| Answer» D. Titanium and its alloys | |
| 9. |
The passive state of a metal is often relatively unstable and subject to damage. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Which of the following is/are correct regarding passivation? |
| A. | It is defined as the loss of reactivity at certain conditions |
| B. | Usually results in the formation of the oxide layer |
| C. | The corrosion rates are relatively low |
| D. | It is defined as loss of reactivity at certain conditions usually due to the formation of the oxide layer and corrosion rates are relatively low |
| Answer» E. | |