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. |
What is depicted in the given figure? |
| A. | Concentration polarization of hydrogen-hydrogen ion |
| B. | Resistance polarization of hydrogen-hydrogen ion |
| C. | Activation polarization of hydrogen-hydrogen ion |
| D. | Both activation and concentration polarization of hydrogen-hydrogen ion |
| Answer» D. Both activation and concentration polarization of hydrogen-hydrogen ion | |
| 2. |
What is the relationship between reaction rate and overvoltage for activation polarization? |
| A. | na=±βlog(i0/i) |
| B. | na=±βlog(I/i0) |
| C. | na=±βlog(1-i0/i) |
| D. | na=±βlog(1-i/i0) |
| Answer» C. na=±βlog(1-i0/i) | |
| 3. |
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. | |
| 4. |
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 | |
| 5. |
Which of the following metal shows the highest exchange current density for hydrogen-hydrogen ion as per given figure? |
| A. | Mercury |
| B. | Iron |
| C. | Platinized platinum |
| D. | Platinum |
| Answer» D. Platinum | |
| 6. |
What is the formula to calculate rate of oxidation or rate of reduction during equilibrium? |
| A. | r0=rR=i0nF |
| B. | r0=rR=i0/nF |
| C. | r0=rR=i0n/F |
| D. | r0=rR=nF/i0 |
| Answer» C. r0=rR=i0n/F | |
| 7. |
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 | |
| 8. |
What is the symbol of overvoltage? |
| A. | Alpha (α) |
| B. | Beta (β) |
| C. | Eta (η) |
| D. | Delta (Δ) |
| Answer» D. Delta (Δ) | |
| 9. |
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. | |
| 10. |
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 | |