MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 14 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 aspects of alteration of the environment to minimize erosion-corrosion? |
| A. | Deaeration of corrosive solution |
| B. | Decrease the temperature |
| C. | Use of Settling and filtration to remove suspended solids |
| D. | Deaeration of the corrosive solution, decrease the temperature and use of settling and filtration to remove suspended solids |
| Answer» E. | |
| 2. |
Which of the following is/are the aspects of design to minimize erosion-corrosion? |
| A. | Increasing pipe diameter |
| B. | Avoiding sharp edges and turnings |
| C. | Readily replaceable impingement plates should be inserted |
| D. | Increasing pipe diameter, avoiding sharp edges and turnings and readily replaceable impingement plates should be inserted |
| Answer» E. | |
| 3. |
Which of the following is/are the preventions of erosion-corrosion? |
| A. | Selection of better resistant materials |
| B. | Alteration of the environment |
| C. | Applying protective coatings |
| D. | Selection of better resistant materials, alteration of the environment and applying protective coatings |
| Answer» E. | |
| 4. |
Which of the following metal shows a decrease in corrosion attack with an increase in velocity in fuming nitric acid? |
| A. | Aluminum |
| B. | Carbon steel |
| C. | Stainless steel 347 |
| D. | Copper |
| Answer» D. Copper | |
| 5. |
Define critical velocity regarding erosion-corrosion. |
| A. | Velocity at which erosion-corrosion starts |
| B. | Velocity at which erosion-corrosion stops |
| C. | Velocity after which erosion-corrosion increases exponentially |
| D. | Velocity after which erosion-corrosion decreases exponentially |
| Answer» D. Velocity after which erosion-corrosion decreases exponentially | |
| 6. |
Which of the following environmental factor plays an important role in erosion-corrosion? |
| A. | Velocity |
| B. | Corrosive concentration |
| C. | pH of the environment |
| D. | Relative humidity of the atmosphere |
| Answer» B. Corrosive concentration | |
| 7. |
Which of the following metal is resistant to seawater, chlorides, and fuming nitric acid? |
| A. | Aluminum |
| B. | Lead |
| C. | Titanium |
| D. | Stainless steel |
| Answer» E. | |
| 8. |
Which of the following characteristics of titanium, makes it resistant to erosion-corrosion? |
| A. | Stability of titanium oxide |
| B. | Instability of titanium oxide |
| C. | The low reactivity of titanium |
| D. | The low reactivity of titanium and instability of titanium oxide |
| Answer» B. Instability of titanium oxide | |
| 9. |
Which of the following is/are the characteristics of oxide film that exhibits better resistance to erosion-corrosion? |
| A. | Hard |
| B. | Dense |
| C. | Adherent |
| D. | Hard, dense and adherent |
| Answer» E. | |
| 10. |
Which of the following type of equipment is/are highly prone to erosion-corrosion? |
| A. | In piping arrangements at elbows and bends |
| B. | Measuring devices such as orifice and turbine blades |
| C. | In piping arrangements at straight lines |
| D. | In piping arrangements at elbows and bends and measuring devices such as orifice and turbine blades |
| Answer» E. | |
| 11. |
Which of the following metals is/are susceptible to erosion-corrosion? |
| A. | Aluminum |
| B. | Lead |
| C. | Stainless steel |
| D. | Aluminum, lead and stainless steel |
| Answer» E. | |
| 12. |
Erosion corrosion results when the protective oxide films are damaged and the metal or alloy are attacked at a rapid rate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 13. |
Which of the following type of directional patterns usually exhibit by erosion-corrosion? |
| A. | Grooves |
| B. | Waves |
| C. | Rounded holes |
| D. | Grooves, waves and rounded holes |
| Answer» E. | |
| 14. |
Erosion corrosion accelerates the rate of attack on a metal because of relative movement between corrosive fluid and the metal surface. |
| A. | True |
| B. | False |
| Answer» B. False | |