MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
_______ is a chemical substance which reduces the corrosion rate. |
| A. | Corrosion inhibitor |
| B. | Corrosion initiator |
| C. | Electrolyte |
| D. | Corrosive medium |
| Answer» B. Corrosion initiator | |
| 2. |
What are the factors that affect corrosion? |
| A. | Temperature |
| B. | Humidity |
| C. | Conductance of the corroding medium |
| D. | Temperature, humidity and conductance of the corroding medium |
| Answer» E. | |
| 3. |
Corrosion of iron takes place even in the solid ice. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Which of the following corrosion contaminant will act as a protective layer? |
| A. | AgCl |
| B. | SnCl<sub>2</sub> |
| C. | Fe<sub>2</sub>O<sub>3</sub> |
| D. | CaO |
| Answer» B. SnCl<sub>2</sub> | |
| 5. |
What is the mechanism of dry corrosion? |
| A. | Absorption |
| B. | Electrochemical |
| C. | Differential solubility |
| D. | Both electrochemical and differential solubility |
| Answer» B. Electrochemical | |
| 6. |
Which theory explains the oxidation of metals? |
| A. | Collison theory |
| B. | Molecular orbital theory |
| C. | Wagner s theory |
| D. | Mixed potential theory |
| Answer» D. Mixed potential theory | |
| 7. |
If a metal undergoes uniform corrosion it becomes _____ |
| A. | thinner |
| B. | thicker |
| C. | perforated |
| D. | thicker and perforated |
| Answer» B. thicker | |
| 8. |
The cathodic reaction that occurs during corrosion in oxygenated acidic solution is ______ |
| A. | 2H<sup>+</sup>+2e<sup> </sup>==>H<sub>2</sub> |
| B. | 4H<sup>+</sup>+O<sub>2</sub>+4e<sup> </sup>==>2H<sub>2</sub>O |
| C. | 2H<sub>2</sub>O+2e<sup> </sup>==>H<sub>2</sub>+2OH<sup> </sup> |
| D. | 2H<sub>2</sub>O+O<sub>2</sub>+4e<sup> </sup>==>4OH<sup> </sup> |
| Answer» C. 2H<sub>2</sub>O+2e<sup> </sup>==>H<sub>2</sub>+2OH<sup> </sup> | |
| 9. |
Which of the following factors affect the corrosion rate of metal? |
| A. | Relative surface area of an anode and cathode |
| B. | Nature of the oxide layer |
| C. | Purity of metal |
| D. | Relative surface area of an anode and cathode, nature of oxide layer and purity of metal |
| Answer» E. | |