MCQOPTIONS
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MCQOPTIONS
This section includes 7 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 true regarding parabolic oxidation rate law? |
| A. | It was proposed by C. Wagner |
| B. | It states that square of weight loss is directly proportional to the time of exposure |
| C. | It was proposed by C. Wagner which states that square of weight loss is directly proportional to the time of exposure and it resembles non-steady-state diffusion-controlled reactions |
| D. | It resembles non-steady-state diffusion-controlled reactions |
| Answer» D. It resembles non-steady-state diffusion-controlled reactions | |
| 2. |
Which of the following metal doesn t follow linear oxidation law? |
| A. | Sodium |
| B. | Aluminum |
| C. | Niobium |
| D. | Potassium |
| Answer» C. Niobium | |
| 3. |
Which of the following is/are correct regarding linear oxidation law? |
| A. | Weight gain per unit area of the metal is directly proportional to the exposure time |
| B. | It is a characteristic of porous or cracked scale |
| C. | Sodium is an example that follows linear oxidation law |
| D. | Weight gain per unit area of metal is directly proportional to exposure time, it is characteristic of porous or cracked scale and sodium follows linear oxidation law |
| Answer» E. | |
| 4. |
What are the types of oxidation rate laws? |
| A. | Linear and parabolic law |
| B. | Cubic and logarithmic law |
| C. | Linear, parabolic and cubic law |
| D. | Linear, parabolic, cubic and logarithmic law |
| Answer» E. | |
| 5. |
Diffusion-controlled oxidation can be minimized by decreasing the concentration of ionic defects in the scale. |
| A. | False |
| B. | True |
| Answer» C. | |
| 6. |
Which of the following is/are correct regarding the measurement of the rate of oxidation? |
| A. | Weight loss per unit area of metal is the measure of the rate of oxidation |
| B. | Either weight loss or weight gain per unit area of metal is the measure of the rate of oxidation |
| C. | Weight gain per unit area of metal is the measure of the rate of oxidation |
| D. | Neither weight loss nor weight gain per unit area of metals is the measure of the rate of oxidation |
| Answer» D. Neither weight loss nor weight gain per unit area of metals is the measure of the rate of oxidation | |
| 7. |
In general, all oxides are nonstoichiometric in nature their composition varies from an ideal molecular formula. |
| A. | True |
| B. | False |
| Answer» B. False | |