MCQOPTIONS
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MCQOPTIONS
This section includes 8 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 is the relationship between reaction rate and overvoltage for activation polarization? |
| A. | n<sub>a</sub>= log(i<sub>0</sub>/i) |
| B. | n<sub>a</sub>= log(I/i<sub>0</sub>) |
| C. | n<sub>a</sub>= log(1-i<sub>0</sub>/i) |
| D. | n<sub>a</sub>= log(1-i/i<sub>0</sub>) |
| Answer» C. n<sub>a</sub>= log(1-i<sub>0</sub>/i) | |
| 2. |
Which of the following mentioned is/are the types of polarization? |
| A. | Activation polarization |
| B. | Concentration polarization |
| C. | Resistance polarization |
| D. | Activation, concentration and resistance polarization |
| Answer» E. | |
| 3. |
Which of the following is the controlling factor of Activation polarization? |
| A. | The activation energy of a reaction |
| B. | Diffusion of ions in the solution |
| C. | The temperature of a solution |
| D. | The velocity of a solution |
| Answer» B. Diffusion of ions in the solution | |
| 4. |
What is the formula to calculate rate of oxidation or rate of reduction during equilibrium? |
| A. | r<sub>0</sub>=r<sub>R</sub>=i<sub>0</sub>nF |
| B. | r<sub>0</sub>=r<sub>R</sub>=i<sub>0</sub>/nF |
| C. | r<sub>0</sub>=r<sub>R</sub>=i<sub>0</sub>n/F |
| D. | r<sub>0</sub>=r<sub>R</sub>=nF/i<sub>0</sub> |
| Answer» C. r<sub>0</sub>=r<sub>R</sub>=i<sub>0</sub>n/F | |
| 5. |
Exchange current density is the current per unit area of either oxidation or reduction process at the equilibrium. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
What is the symbol of overvoltage? |
| A. | Alpha ( ) |
| B. | Beta ( ) |
| C. | Eta ( ) |
| D. | Delta ( ) |
| Answer» D. Delta ( ) | |
| 7. |
Which of the following is correct regarding Polarization? |
| A. | It is the deviation from equilibrium potential |
| B. | It results from the change in net current flow |
| C. | Magnitude is measured in terms of overvoltage |
| D. | It is the deviation from equilibrium potential that occurred due to the change in net current flow and its magnitude is measured in terms of overvoltage. |
| Answer» E. | |
| 8. |
What is meant by an anode? |
| A. | An electrode at which reduction process takes place |
| B. | An electrode at which oxidation process takes place |
| C. | An electrode at which neither the oxidation nor reduction takes place |
| D. | An electrode at which both oxidation and reduction takes place |
| Answer» C. An electrode at which neither the oxidation nor reduction takes place | |