MCQOPTIONS
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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 factors are considered to evaluate the paint test? |
| A. | Appearance of coating |
| B. | Presence and extent of corrosion |
| C. | Under film corrosion |
| D. | The appearance of coating, presence, and extent of corrosion and under film corrosion |
| Answer» E. | |
| 2. |
Which of the following method is the best approach to report the results of the pitting corrosion test? |
| A. | Reporting the number of pits per unit area |
| B. | Reporting maximum depth of a pit |
| C. | Reporting average depth of pits |
| D. | Reporting weight loss of a metal |
| Answer» C. Reporting average depth of pits | |
| 3. |
Which of the following is/are the corrosion testing s for stainless steels? |
| A. | Warren test |
| B. | Streicher test |
| C. | Huey test |
| D. | Warren test, Streicher test and huey test |
| Answer» E. | |
| 4. |
Calculate the corrosion penetration rate of iron that corroding at an electrochemical corrosion rate of 1 microampere/sq. centimeters? |
| A. | 0.212 mpy |
| B. | 0.11 mpy |
| C. | 0.46 mpy |
| D. | 0.64 mpy |
| Answer» D. 0.64 mpy | |
| 5. |
Which of the following expression is used for electrochemical techniques to determine the corrosion penetration rate? |
| A. | Corrosion penetration rate = K (ai/D) |
| B. | Corrosion penetration rate = K (ai/nD) |
| C. | Corrosion penetration rate = (ai/nD) |
| D. | Corrosion penetration rate = (ai/nD) |
| Answer» C. Corrosion penetration rate = (ai/nD) | |
| 6. |
Which of the following units are used in terms of penetration of pits on a metal? |
| A. | Milligram sq. decimeter per day (MDD) |
| B. | Mils per year (MPY) |
| C. | Both MDD and MPY |
| D. | Neither MDD nor MPY |
| Answer» C. Both MDD and MPY | |
| 7. |
Which of the following standard expression is used to measure the corrosion rate of a metal? |
| A. | Mils per year = W/DAT |
| B. | Mils per year = 534W/DAT |
| C. | Milligrams decimeter per day = 534W/DAT |
| D. | Milligrams decimeter per day = W/DAT |
| Answer» C. Milligrams decimeter per day = 534W/DAT | |
| 8. |
Which of the following metals in which corrosion decreases with an increase in temperature in oxygenated corrosive solutions? |
| A. | Copper and its alloys |
| B. | Steels |
| C. | Cast irons |
| D. | Aluminum and its alloys |
| Answer» B. Steels | |
| 9. |
Which of the following is/are the factors that affect corrosion testing? |
| A. | Temperature |
| B. | Dissolved oxygen |
| C. | Nature of metal |
| D. | Temperature, dissolved oxygen, and nature of metal |
| Answer» E. | |
| 10. |
The Corrodibility of the metal in a corrosion test may decrease or increase as a function of time. |
| A. | True |
| B. | False |
| Answer» B. False | |