MCQOPTIONS
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MCQOPTIONS
This section includes 18 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Behaviour knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Nylon has a linear S-N curve. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
Endurance limit has unit Kgf. |
| A. | True |
| B. | False |
| Answer» C. | |
| 3. |
Magnitude of compressive stress on the fatigue test specimen is ___ tensile stress magnitude. |
| A. | Equal to |
| B. | Greater than |
| C. | Lesser than |
| D. | Changes with weight |
| Answer» B. Greater than | |
| 4. |
What is the relation between stress at the tension side and diameter of the fatigue test specimen? |
| A. | σt α d |
| B. | σt α d2 |
| C. | σt α 1/d2 |
| D. | σt α 1/d3 |
| Answer» E. | |
| 5. |
Which ferrous material doesn’t show fatigue limit? |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Austenitic stainless steel |
| D. | Low carbon steel |
| Answer» D. Low carbon steel | |
| 6. |
Word “endurance limit” is used for _____________ |
| A. | Plastics |
| B. | Ferrous materials |
| C. | Nonferrous materials |
| D. | Alloys |
| Answer» D. Alloys | |
| 7. |
WHAT_IS_THE_RELATION_BETWEEN_STRESS_AT_THE_TENSION_SIDE_AND_DIAMETER_OF_THE_FATIGUE_TEST_SPECIMEN??$ |
| A. | σ<sub>t</sub> α d |
| B. | σ<sub>t</sub> α d<sup>2</sup> |
| C. | σ<sub>t</sub> α 1/d<sup>2</sup> |
| D. | σ<sub>t</sub> α 1/d<sup>3</sup> |
| Answer» E. | |
| 8. |
Endurance limit has unit Kgf.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 9. |
Magnitude_of_compressive_stress_on_the_fatigue_test_specimen_is_____tensile_stress_magnitude.$ |
| A. | Equal to |
| B. | Greater than |
| C. | Lesser than |
| D. | Changes with weight |
| Answer» B. Greater than | |
| 10. |
Nylon_has_a_linear_S-N_curve. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
What cycles range is chosen for endurance limit? |
| A. | 10<sup>2</sup> – 10<sup>3</sup> |
| B. | 10<sup>5</sup> – 10<sup>6</sup> |
| C. | 10<sup>7</sup> – 10<sup>8</sup> |
| D. | 10<sup>11</sup> – 10<sup>12</sup> |
| Answer» D. 10<sup>11</sup> ‚Äö√Ñ√∂‚àö√ë‚àö¬® 10<sup>12</sup> | |
| 12. |
What is the reason for fatigue failure? |
| A. | Movement of Dislocations |
| B. | Submicroscopic cracks |
| C. | Dynamic recovery |
| D. | Vacancy coalescence |
| Answer» C. Dynamic recovery | |
| 13. |
Which of the following show a fatigue limit? |
| A. | Titanium |
| B. | Cast iron |
| C. | Magnesium |
| D. | Al-Mg alloys |
| Answer» C. Magnesium | |
| 14. |
Which ferrous material doesn’t show fatigue limit?$ |
| A. | Cast iron |
| B. | Wrought iron |
| C. | Austenitic stainless steel |
| D. | Low carbon steel |
| Answer» D. Low carbon steel | |
| 15. |
Word “endurance limit” is used for _____________$ |
| A. | Plastics |
| B. | Ferrous materials |
| C. | Nonferrous materials |
| D. | Alloys |
| Answer» D. Alloys | |
| 16. |
What term is used for the maximum stress at which material fail on a specified number of cycle? |
| A. | Fatigue strength |
| B. | Fatigue life |
| C. | Ultimate tensile strength |
| D. | Endurance limit |
| Answer» B. Fatigue life | |
| 17. |
Fatigue curves are popularly known as __________ curves. |
| A. | S |
| B. | R |
| C. | N |
| D. | S-N |
| Answer» E. | |
| 18. |
In what terms, fatigue life is measured? |
| A. | Time of failures |
| B. | Number of cycles of failure |
| C. | Stress of failure |
| D. | Appearance of fracture |
| Answer» C. Stress of failure | |