MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following metals are more corrosion resistant in a high-velocity corrosive solution? |
| A. | Stainless steel |
| B. | Lead |
| C. | Titanium |
| D. | Both stainless steel and titanium |
| Answer» E. | |
| 2. |
What is the other name of concentration polarization? |
| A. | Anodic diffusion control |
| B. | Cathodic diffusion control |
| C. | Erosion corrosion |
| D. | Activation polarization |
| Answer» C. Erosion corrosion | |
| 3. |
The corrosion rate depends on both the medium and the metal involved. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
What is the nature of copper corrosion in oxygenated sulfuric acid? |
| A. | Active region |
| B. | Passive region |
| C. | Active-Passive transition region |
| D. | Trans-passive region |
| Answer» B. Passive region | |
| 5. |
Which of the following metal-acid combination will shift metal from active to passive state with an increase in oxidizer concentration? |
| A. | Monel in HCl+O<sub>2</sub> |
| B. | 18Cr-8Ni in H<sub>2</sub>SO<sub>4</sub>+Fe<sup>+3</sup> |
| C. | Fe in H<sub>2</sub>O+O<sub>2</sub> |
| D. | 18Cr-8Ni in HNO<sub>3</sub> + Cr<sub>2</sub>O<sub>3</sub> |
| Answer» C. Fe in H<sub>2</sub>O+O<sub>2</sub> | |
| 6. |
Passivity is achieved only if a sufficient quantity of oxidizer is added to the medium. |
| A. | True |
| B. | False |
| Answer» B. False | |