MCQOPTIONS
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MCQOPTIONS
This section includes 6 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 hypothesis of mixed potential theory? |
| A. | Any electrochemical reaction can be divided into two or more partial reactions |
| B. | No net accumulation of electric charge during the reaction |
| C. | Any electrochemical reaction can be divided into two or more partial reactions and no net accumulation of electric charge during the reaction |
| D. | Electrochemical reactions can t be divided into partial reactions |
| Answer» D. Electrochemical reactions can t be divided into partial reactions | |
| 2. |
Which two scientists present the first formal presentation on mixed potential theory? |
| A. | Wagner and Traud |
| B. | Wagner and Evans |
| C. | Traud and Nernst |
| D. | Wilsmore and Nernst |
| Answer» E. | |
| 3. |
Which of the following is/are correct regarding resistance polarization? |
| A. | Activation energy at the interface is the controlling factor |
| B. | The resistance of transition between electrodes and electrolytes |
| C. | Diffusion of ions in the bulk solution is the controlling factor |
| D. | The resistance of reacting ions for diffusion is the controlling factor |
| Answer» C. Diffusion of ions in the bulk solution is the controlling factor | |
| 4. |
Agitation will increase the limiting diffusion current density of concentration polarization. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
What is the formula to determine limiting diffusion current density (iL) of concentration polarization? |
| A. | i<sub>L</sub>=xnFC<sub>B</sub>/D |
| B. | i<sub>L</sub>=DC<sub>B</sub> /nFx |
| C. | i<sub>L</sub>=DnFC<sub>B</sub>/x |
| D. | i<sub>L</sub>=x/DnFC<sub>B</sub> |
| Answer» D. i<sub>L</sub>=x/DnFC<sub>B</sub> | |
| 6. |
Which of the following is/are correct regarding concentration polarization? |
| A. | Diffusion of ions in the bulk solution is the controlling factor |
| B. | It usually operates at a high current density |
| C. | It is a continuation of Activation polarization |
| D. | It is a continuation of activation polarization, diffusion of ions in the bulk solution is the controlling factor and it usually operates at high current densities |
| Answer» E. | |