MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Aerospace Materials and Processes knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The fatigue limit of steel is around ____ times the ultimate tensile strength. |
| A. | 0.3 |
| B. | 5 |
| C. | 3 |
| D. | 0.5 |
| Answer» E. | |
| 2. |
The fatigue limit of a specimen is ___________ of its fatigue range. |
| A. | triple |
| B. | double |
| C. | half |
| D. | exactly the same |
| Answer» D. exactly the same | |
| 3. |
Materials that have been subjected to heat treatment generally have lower tensile strengths than materials that are annealed. |
| A. | True |
| B. | False |
| Answer» C. | |
| 4. |
Corrosion of materials results in ___________ of fatigue limit. |
| A. | reduction |
| B. | increment |
| C. | double |
| D. | satisfaction |
| Answer» B. increment | |
| 5. |
The specimen of fatigue testing must not have ___________ |
| A. | Uniform cross-section |
| B. | Metal |
| C. | Certain colours |
| D. | Notches and holes |
| Answer» E. | |
| 6. |
What is the diameter of a typical specimen used in fatigue testing? |
| A. | 2000 inches |
| B. | 0.0005 inches |
| C. | 1 inch |
| D. | 26 inches |
| Answer» D. 26 inches | |
| 7. |
What is the typical speed of rotation in a normal speed fatigue testing machine? |
| A. | 2000 rpm |
| B. | 20 rpm |
| C. | 26,000 rpm |
| D. | 14,000 rpm |
| Answer» B. 20 rpm | |
| 8. |
The amount of test cycles required to find out the fatigue stress of hard aluminium alloys is ____________ |
| A. | 64,000,900,000 |
| B. | 500,000,000 |
| C. | 3000 |
| D. | 27 |
| Answer» C. 3000 | |
| 9. |
Which of the following is a fatigue-testing apparatus? |
| A. | Rotating-beam tests |
| B. | Load test |
| C. | Fixed load test |
| D. | Rotating wing test |
| Answer» B. Load test | |
| 10. |
The amount of test cycles required to find out the fatigue stress of hard steels is ___________ |
| A. | 10,000,000 |
| B. | 2600 |
| C. | 26 |
| D. | 2,000,000 |
| Answer» E. | |
| 11. |
Testing a material to know it s fatigue strength is very easy. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
What is fatigue stress? |
| A. | The stress endured by an observer |
| B. | Stress divided by strain and multiplied by conductivity |
| C. | The amount of stress, a material can tolerate repeatedly without failure |
| D. | The stress endured perpendicular to the observer |
| Answer» D. The stress endured perpendicular to the observer | |