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 used for ammoniacal solution applications? |
| A. | Cast iron and steel |
| B. | 430 and 304 type stainless steels |
| C. | Cast iron, steel, 430 and 304 type stainless steels |
| D. | Copper and cast irons |
| Answer» D. Copper and cast irons | |
| 2. |
Which of the following can be used to inhibit stress corrosion cracking in ammoniacal solutions? |
| A. | Addition of 0.2% water |
| B. | Addition of 0.025% hydrazine in refrigeration |
| C. | Addition of oxidizing agents |
| D. | Either addition of 0.2% water or addition of 0.025% hydrazine in refrigeration |
| Answer» E. | |
| 3. |
Oxygen is the primary cause of cracking in ammoniacal solution rather than nitrogen. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which of the following metal results in stress corrosion cracking in an ammoniacal solution? |
| A. | Aluminum and its alloys |
| B. | Nickel and its alloys |
| C. | Copper and its alloys |
| D. | Stainless steels |
| Answer» D. Stainless steels | |
| 5. |
Aluminum is a very poor resistant material for handling caustic environments and rapidly attacked even by dilute solutions. |
| A. | False |
| B. | True |
| Answer» C. | |
| 6. |
Which of the following metal is suitable under all conditions of concentration and temperature in caustic soda? |
| A. | Nickel |
| B. | Aluminum |
| C. | Titanium |
| D. | Carbon steel |
| Answer» B. Aluminum | |
| 7. |
Which of the following common alkalies that results in stress-corrosion cracking of steel? |
| A. | Caustic soda |
| B. | Caustic soda and caustic potash |
| C. | Caustic potash |
| D. | Sodium carbonate |
| Answer» C. Caustic potash | |
| 8. |
Which of the following is/are the preventions of caustic embrittlement? |
| A. | Optimize stress concentration |
| B. | Avoid caustic environment |
| C. | Use of nickel-based alloys, avoid caustic environment and optimize stress concentration |
| D. | Use mild carbon steels |
| Answer» D. Use mild carbon steels | |
| 9. |
Which of the following statements is/are correct regarding caustic embrittlement? |
| A. | Mild carbon steels are susceptible to caustic embrittlement |
| B. | It occurs in concentrated hydroxide environment |
| C. | It occurs around the rivets |
| D. | Mild carbon steels are susceptible to caustic embrittlement in concentrated hydroxide environment around the rivets |
| Answer» E. | |
| 10. |
What is meant by caustic embrittlement? |
| A. | Decrease in compressive strength due to caustic accumulation |
| B. | The phenomenon of metal to become brittle due to caustic accumulation at the rivets |
| C. | Entrapment of caustic content between atoms to cause brittleness |
| D. | The phenomenon of metal to become more tensile due to caustic accumulation |
| Answer» C. Entrapment of caustic content between atoms to cause brittleness | |