MCQOPTIONS
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MCQOPTIONS
This section includes 10 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 preventive measures of fretting corrosion? |
| A. | Lubricate with low-viscosity, high-tenacity oil |
| B. | Increasing surface hardness by shot-peening or cold working |
| C. | Use gaskets to absorb vibrations |
| D. | Lubricate with low-viscosity, high-tenacity oil, increasing surface hardness by shot-peening and use gaskets to absorb vibrations |
| Answer» E. | |
| 2. |
Which of the following is/are the basic requirements for the occurrence of fretting corrosion? |
| A. | The interface must be under load |
| B. | Vibration or repeated relative motion between the two surfaces |
| C. | The interface must be under load and vibration or repeated relative motion between the two surfaces |
| D. | The relative motion should be high |
| Answer» D. The relative motion should be high | |
| 3. |
Which of the following is/are the classic cases of fretting corrosion? |
| A. | Bolted tie plates on railroad rails |
| B. | Press-fitted ball bearing race on a shaft |
| C. | On ball bearings |
| D. | Bolted tie plates on railroad rails and press-fitted ball bearing race on a shaft |
| Answer» E. | |
| 4. |
Which of the following is/are the other names of fretting corrosion? |
| A. | Friction oxidation |
| B. | Wear oxidation |
| C. | False brinelling |
| D. | Friction oxidation, wear oxidation and false brinelling |
| Answer» E. | |
| 5. |
Which of the following type of corrosion that occurs at contact areas between materials under load subjected to vibration or relative motion? |
| A. | Fretting corrosion |
| B. | Crevice corrosion |
| C. | Cavitation damage |
| D. | Pitting corrosion |
| Answer» B. Crevice corrosion | |
| 6. |
Cavitation damaged can be reduced by changing the design to minimize hydrodynamic pressure differences in process streamflow. |
| A. | False |
| B. | True |
| Answer» C. | |
| 7. |
Which of the following will result due to cavitation damage of a metal? |
| A. | Mechanical action |
| B. | Chemical dissolution |
| C. | Both mechanical action and chemical dissolution |
| D. | Neither mechanical action nor chemical dissolution |
| Answer» D. Neither mechanical action nor chemical dissolution | |
| 8. |
Which of the following condition is/are correct regarding the boiling point of a liquid with an increase in pressure? |
| A. | Decreases up to triple point |
| B. | Increases up to triple point |
| C. | Increases up to the critical point |
| D. | Decreases up to the critical point |
| Answer» B. Increases up to triple point | |
| 9. |
Which of the following equipment encounters cavitation damage in the service? |
| A. | Hydraulic turbines |
| B. | Ship propellers |
| C. | Pump impellers |
| D. | Hydraulic turbines, ship propellers, and pump impellers |
| Answer» E. | |
| 10. |
Which of the following type of corrosion is caused by the formation and collapse of vapor bubbles in a liquid near the metal surface? |
| A. | Filiform corrosion |
| B. | Fretting corrosion |
| C. | Cavitation damage |
| D. | Crevice corrosion |
| Answer» D. Crevice corrosion | |