MCQOPTIONS
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MCQOPTIONS
This section includes 15 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 corrosion is depicted in the given figure? |
| A. | Crevice corrosion |
| B. | Pitting corrosion |
| C. | Galvanic corrosion |
| D. | Uniform corrosion |
| Answer» D. Uniform corrosion | |
| 2. |
Which of the following is the most corrosion-resistant metal at room temperature? |
| A. | Titanium |
| B. | Platinum |
| C. | Gold |
| D. | Tantalum |
| Answer» E. | |
| 3. |
The potential generated by two dissimilar metal combinations can change with time. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
What does the square bracket [] in the galvanic series indicates? |
| A. | Most practical metal combinations |
| B. | High corrosion-resistant metals |
| C. | Low corrosion-resistant metals |
| D. | Avoidable metal combinations |
| Answer» B. High corrosion-resistant metals | |
| 5. |
Which of the following metal combination has a minimum galvanic effect? |
| A. | Monel and copper |
| B. | Inconel (passive) and Inconel (active) |
| C. | 18-8 stainless steel (active) and 18-8 stainless steel (passive) |
| D. | Titanium and lead |
| E. | and Inconel (active)c) 18-8 stainless steel (active) and 18-8 stainless steel (passive)d) Titanium and lead |
| Answer» B. Inconel (passive) and Inconel (active) | |
| 6. |
Which of the following electrolyte is used for the preparation of a general galvanic series? |
| A. | Polluted seawater |
| B. | Unpolluted river water |
| C. | Polluted river water |
| D. | Unpovlluted seawater |
| Answer» E. | |
| 7. |
What is the abbreviation of EMF? |
| A. | Electromagnetic force |
| B. | Electromotive frequency |
| C. | Electromotive force |
| D. | Electrode motive force |
| Answer» D. Electrode motive force | |
| 8. |
What is the standard reduction potential value of potassium in the EMF series? |
| A. | +0.337 V |
| B. | -2.925 V |
| C. | -0.763 V |
| D. | -1.662 V |
| Answer» C. -0.763 V | |
| 9. |
What is the standard reduction potential value of gold in the EMF series? |
| A. | +1.498 V |
| B. | +1.2 V |
| C. | +0.987 V |
| D. | +0.799 V |
| Answer» B. +1.2 V | |
| 10. |
What are the conditions to measure the standard reduction potential of metals against SHE? |
| A. | 2 atm pressure, 25°C temperature, 2M concentration of H+ |
| B. | 2 atm pressure, 25°C temperature, 1M concentration of H+ |
| C. | 1 atm pressure, 25°C temperature, 1M concentration of H+ |
| D. | 1 atm pressure, 25°C temperature, 2M concentration of H+ |
| Answer» D. 1 atm pressure, 25°C temperature, 2M concentration of H+ | |
| 11. |
Which of the following is the primary characteristic of an electrolyte to form corrosion? |
| A. | Electrical resistivity |
| B. | Thermal resistivity |
| C. | Thermal conductivity |
| D. | Electrical conductivity |
| Answer» E. | |
| 12. |
Which of the following will act as cathode and anode respectively in a dry-cell battery? |
| A. | Zinc and carbon |
| B. | Carbon and zinc |
| C. | Magnesium and zinc |
| D. | Zinc and ammonium chloride |
| Answer» C. Magnesium and zinc | |
| 13. |
Which of the following is the driving force in galvanic corrosion? |
| A. | Conductivity of electrolyte |
| B. | Crystal structure of metals |
| C. | The potential difference between the two metals |
| D. | Temperature of electrolyte |
| Answer» D. Temperature of electrolyte | |
| 14. |
Corrosion of less corrosion-resistant metal is usually increased and the attack of the more corrosion-resistant is decreased in galvanic corrosion. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 15. |
What is the other name of galvanic corrosion? |
| A. | Bi-metallic corrosion |
| B. | Mono-metallic corrosion |
| C. | Localized corrosion |
| D. | Mono-metallic and localized corrosionView Answer |
| Answer» B. Mono-metallic corrosion | |