MCQOPTIONS
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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. |
What are the uses of corrosion rate estimation of materials in daily life? |
| A. | To predict the life time of a component |
| B. | To compare the corrosive-resistant of materials |
| C. | To increases the corrosion rate |
| D. | To predict the life time and to compare the corrosive resistant of materials |
| Answer» E. | |
| 2. |
Oxidizing impurities in electrolyte increases the corrosion rate. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
___________ will occur, if current pass from an electrode to electrolyte. |
| A. | Oxidation |
| B. | Reduction |
| C. | Oxidation and reduction |
| D. | Anion formation |
| Answer» B. Reduction | |
| 4. |
Corrosion rate of aluminum is _________ when compared with corrosion of mild steel in open oxygenated atmosphere. |
| A. | small |
| B. | medium |
| C. | large |
| D. | very small |
| Answer» E. | |
| 5. |
_____ is used to measure the extent of uniform corrosion. |
| A. | MDD |
| B. | MPY |
| C. | Both MPY and MDD |
| D. | MPE |
| Answer» B. MPY | |
| 6. |
Iron is corroding at a current density of 1.69*10-4 amp/cm2. What would be the corrosion rate in MPY? |
| A. | 423 |
| B. | 77 |
| C. | 473 |
| D. | 97 |
| Answer» C. 473 | |
| 7. |
Iron is corroding at a current density of 1.69*10-4 amp/cm2. What would be the corrosion rate in MDD? |
| A. | 773 |
| B. | 723 |
| C. | 423 |
| D. | 473 |
| Answer» D. 473 | |
| 8. |
Rate of oxidation is equals to the rate of reduction in corrosion. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 9. |
Which following expression is used to find the corrosion rate from current density of a corroding specimen? |
| A. | W/At = [(I a<sub>m</sub>) / (n F)] |
| B. | W/At = [(I a<sub>m</sub>) / (n d F)] |
| C. | W/At = [534 (I a<sub>m</sub>) / (n F)] |
| D. | W/At = [(I a<sub>m</sub>) / (n F)] and W/At = [(I a<sub>m</sub>) / (d n F)] |
| Answer» E. | |
| 10. |
Which of the following law is used to derive the corrosion rate expression? |
| A. | Newton s law |
| B. | Henry s law |
| C. | Raoult s law |
| D. | Faraday s law |
| Answer» E. | |
| 11. |
_____ is/are used to measure the extent of pitting corrosion. |
| A. | MPY |
| B. | MDD |
| C. | Both MPY and MDD |
| D. | MPK |
| Answer» B. MDD | |
| 12. |
MPY is used to measure weight loss per unit area. |
| A. | True |
| B. | False |
| Answer» C. | |
| 13. |
MDD in corrosion is abbreviated as ______ |
| A. | milligrams/sq. decimeter/decade |
| B. | millimeters/sq. decimeter/day |
| C. | milligrams/sq. decimeter/day |
| D. | microns/decimeter/decade |
| Answer» D. microns/decimeter/decade | |
| 14. |
Which of the following expression is used to calculate MPY? |
| A. | MPY=(543*W)/DAT |
| B. | MPY=(534*W)/DAT |
| C. | MPY=W/DAT |
| D. | MPY=DAT/(534*W) |
| Answer» C. MPY=W/DAT | |
| 15. |
What is meant by MPY in corrosion? |
| A. | Mils penetration per year |
| B. | Meter penetration per year |
| C. | Milli meter penetration per year |
| D. | Micro meter penetration per year |
| Answer» B. Meter penetration per year | |