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 is/are the types of diffusion coatings? |
| A. | Sherardizing zinc |
| B. | Chromizing chromium |
| C. | Alonizing aluminum |
| D. | Sherardizing zinc, chromizing chromium and alonizing aluminum |
| Answer» E. | |
| 2. |
What is meant by diffusion coatings? |
| A. | Immersing native metal in a solution of the metal to be plated |
| B. | Coating metal is vaporized electrically to deposit on the metals to be coated |
| C. | Heat treatment to cause alloy formation by diffusion of one metal into the other |
| D. | Hot rolling of two metals together to get a composite sheet |
| Answer» D. Hot rolling of two metals together to get a composite sheet | |
| 3. |
What is meant by vapor deposition? |
| A. | A wire or powder through melting flame is blown onto the surface to be protected |
| B. | Coating metal is vaporized electrically to deposit on the metals to be coated |
| C. | Hot rolling of two metals together to get a composite sheet |
| D. | Immersing native metal in a solution of the metal to be plated |
| Answer» C. Hot rolling of two metals together to get a composite sheet | |
| 4. |
Cladding is a great economical advantage in that the corrosion barrier as the expensive material is backed up by inexpensive material by minimizing corrosion. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
What is meant by metal cladding? |
| A. | Immersing native metal in a solution of the metal to be plated |
| B. | Coating metal is vaporized electrically to deposit on the metals to be coated |
| C. | Hot rolling of two metals together to get a composite sheet |
| D. | A wire or powder through melting flame is blown onto the surface to be protected |
| Answer» D. A wire or powder through melting flame is blown onto the surface to be protected | |
| 6. |
Which of the following is/are the application of flame spraying? |
| A. | Bridges |
| B. | Refrigeration equipment |
| C. | Ship hulls |
| D. | Bridges, refrigeration equipment and ship hulls |
| Answer» E. | |
| 7. |
What is meant flame spraying metallic coating? |
| A. | Hot rolling of two metals together to get a composite sheet |
| B. | A wire or powder through melting flame is blown onto the surface to be protected |
| C. | Coating metal is vaporized electrically to deposit on the metals to be coated |
| D. | Immersing native metal in a solution of the metal to be plated |
| Answer» C. Coating metal is vaporized electrically to deposit on the metals to be coated | |
| 8. |
What is the general purpose of each coating in a three-layered coating of an automobile bumper? |
| A. | Inner coating adhesion, intermediate coating corrosion protection and top layer appearance |
| B. | Inner coating corrosion protection, intermediate coating adhesion and top layer appearance |
| C. | All layers for corrosion resistance |
| D. | All layers for appearance |
| Answer» B. Inner coating corrosion protection, intermediate coating adhesion and top layer appearance | |
| 9. |
Which of the following is/are the factors of electroplating that effects efficiency? |
| A. | Temperature and composition of the bath |
| B. | Composition of bath and time |
| C. | Temperature, the composition of the bath, time and current density |
| D. | Current density and composition of the bath |
| Answer» D. Current density and composition of the bath | |
| 10. |
What is meant by electrodeposition? |
| A. | Immersing native metal in a solution of the metal to be plated |
| B. | Hot rolling of two metals together to get a composite sheet |
| C. | A wire or powder through melting flame is blown onto the surface to be protected |
| D. | Coating metal is vaporized electrically to deposit on the metals to be coated |
| Answer» B. Hot rolling of two metals together to get a composite sheet | |
| 11. |
Which of the following is/are the examples for metal-coated articles? |
| A. | Silverware |
| B. | Galvanized steel |
| C. | Tin cans |
| D. | Silverware, galvanized steel, and tin cans |
| Answer» E. | |
| 12. |
What is the reason for the localized attack on the base metal due to the porosity of coatings? |
| A. | Crevice formation |
| B. | Galvanic effect |
| C. | Initiation of pits |
| D. | Crevice formation and galvanic effect |
| Answer» C. Initiation of pits | |
| 13. |
Which of the following is/are the methods to apply metallic coatings? |
| A. | Electrode position |
| B. | Flame spraying |
| C. | Cladding |
| D. | Electrode position, flame spraying, and cladding |
| Answer» E. | |
| 14. |
Which of the following is/are the purposes of coatings? |
| A. | To acts as a sacrificial metal |
| B. | To act as an effective barrier |
| C. | Either to act as sacrificial metal or to act as an effective barrier |
| D. | Neither to act as sacrificial metal nor to act as an effective barrier |
| Answer» D. Neither to act as sacrificial metal nor to act as an effective barrier | |
| 15. |
A thin coating of metallic and inorganic materials can provide a satisfactory barrier between the metal and its environment. |
| A. | True |
| B. | False |
| Answer» B. False | |