MCQOPTIONS
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MCQOPTIONS
This section includes 8 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 is/are the important characteristics of active-passive transitions of a metal? |
| A. | Passive potential (E<sub>pp</sub>) |
| B. | Critical anodic current density (i<sub> xadc</sub>) |
| C. | Passive potential (E<sub>pp</sub>) and Critical anodic current density (i<sub> xadc</sub>) |
| D. | Neither passive potential nor critical anodic current density |
| Answer» D. Neither passive potential nor critical anodic current density | |
| 4. |
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 | |
| 5. |
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. | |
| 6. |
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 | |
| 7. |
The passive state of a metal is often relatively unstable and subject to damage. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
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. | |