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. |
Which of the following is/are correct regarding the potentiostat method? |
| A. | It is a polarization technique that allows for controlled polarization |
| B. | It works on controlling voltage between a working and reference electrode |
| C. | It is a corrosion analysis method |
| D. | It is a corrosion analysis technique method that allows for controlled polarization and it works on controlling voltage between a working and reference electrode. |
| Answer» E. | |
| 2. |
Which of the following metals that are spontaneously passivated on coupling with platinum? |
| A. | Titanium |
| B. | Chromium |
| C. | Titanium and Chromium |
| D. | Neither titanium nor chromium |
| Answer» D. Neither titanium nor chromium | |
| 3. |
In a galvanic couple, the corrosion rate of the metal with active corrosion potential is accelerated whereas the corrosion rate of noble metal retards preferentially. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The reversible potential of gold is more positive than platinum in emf series whereas in galvanic series the position of gold is below platinum. |
| A. | False |
| B. | True |
| Answer» C. | |
| 5. |
Severe corrosion of metals occurred when coupled with platinum is due to the higher current density for hydrogen evolution but not due to the reversible potential of the platinum-platinum ion electrode. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Which of the following type of polarization has a negligible effect on velocity? |
| A. | Concentration polarization |
| B. | Activation polarization |
| C. | Concentration polarization and Activation polarization |
| D. | Neither concentration nor Activation polarization |
| Answer» C. Concentration polarization and Activation polarization | |
| 7. |
The corrosion rate is usually dependent at low velocity whereas at high velocities it becomes independent. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
Which of the following is/are correct when oxidizing agents are added to a corrosion system containing a non-passivating metal? |
| A. | Rate of corrosion decreases after certain potential |
| B. | Rate of corrosion increases with increase in oxidizers concentration |
| C. | Rate of corrosion increases after certain potential |
| D. | Results in the formation stable oxide layer |
| Answer» C. Rate of corrosion increases after certain potential | |
| 9. |
Which of the following is/are the applications of mixed-potential theory? |
| A. | Permit prediction of complex corrosion behavior |
| B. | To develop new corrosion prevention methods |
| C. | To develop new rapid corrosion rate measurement |
| D. | Permit prediction of complex corrosion behavior, to develop new corrosion prevention methods and to develop new rapid corrosion rate measurement |
| Answer» E. | |