MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 types of steel coatings is/are preferred for automobile body parts? |
| A. | Galvanized steels |
| B. | Electroplated steels |
| C. | Galvanized steels, electroplated steels and complete immersion of corrosion preventing primer coat |
| D. | Complete immersion of corrosion preventing primer coat |
| Answer» D. Complete immersion of corrosion preventing primer coat | |
| 2. |
Which of the following is/are the types of mass transfer due to liquid-metal corrosion? |
| A. | Composition-gradient mass transfer |
| B. | Thermal-gradient mass transfer |
| C. | Neither composition nor thermal gradient mass transfer |
| D. | Both composition and thermal gradient mass transfer |
| Answer» E. | |
| 3. |
Which of the following alloys is/are usually used for sodium hydroxide fused salt? |
| A. | Nickel-based alloys |
| B. | Copper-based alloys |
| C. | Ferrous alloys |
| D. | Zinc based alloys |
| Answer» B. Copper-based alloys | |
| 4. |
Which of the following type of corrosion Is usually encounters for various materials in liquid metal environment? |
| A. | Uniform corrosion |
| B. | Stress cracking corrosion |
| C. | Crevice corrosion |
| D. | Pitting corrosion |
| Answer» C. Crevice corrosion | |
| 5. |
Which of the following materials have superior corrosion resistance and high rupture strength in mercury? |
| A. | 5% chromium steels |
| B. | Si-Cr-Mo steels |
| C. | 5% chromium steels and Si-Cr-Mo steels |
| D. | Carbon steels |
| Answer» D. Carbon steels | |
| 6. |
The presence of traces of titanium and magnesium in mercury can inhibit the corrosion of iron in ferrous-based alloys. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
Which of the following type of stainless steels are attacked by magnesium at its melting point? |
| A. | Duplex stainless steels |
| B. | Austenitic stainless steels |
| C. | Martensitic stainless steels |
| D. | Ferritic stainless steels |
| Answer» C. Martensitic stainless steels | |
| 8. |
Which of the following materials shows good resistance to both liquid-metals and high-temperature oxidation? |
| A. | High alloy stainless steels |
| B. | Monel |
| C. | Hastelloy |
| D. | Hastelloy, high alloy stainless steels and monel |
| Answer» E. | |
| 9. |
Which of the following parameter has a direct relation with the corrosion rate in liquid metals? |
| A. | Percentage of alloying elements |
| B. | Solubility of the metallic structure in liquid metal |
| C. | Solubility of alloying elements in metallic matrix |
| D. | Percentage of oxygen |
| Answer» C. Solubility of alloying elements in metallic matrix | |
| 10. |
Which of the following is/are undesirable in heat-exchange systems handling liquid metals? |
| A. | Deposition of impurities in cool areas |
| B. | Resistance to heat transfer |
| C. | Formation of brittle intermetallic compounds, resistance to heat transfer and deposition of impurities in cool areas |
| D. | Formation of brittle intermetallic compounds |
| Answer» D. Formation of brittle intermetallic compounds | |
| 11. |
Which of the following is/are the types of liquid-metal corrosion? |
| A. | Solution of structural metal |
| B. | Diffusion of liquid into solid metal |
| C. | Intermetallic compound formation |
| D. | Solution of structural metal, diffusion of liquid into solid metal and intermetallic compound formation |
| Answer» E. | |
| 12. |
1.The liquid-metal corrosion is usually a physical effect rather than an electrochemical attack. |
| A. | True |
| B. | False |
| Answer» B. False | |