Factor of safety in machine design is defined as the ratio of ultimate stress to _____________ stress ?
Correct answer: D. Working
- A. None of these
- B. Bearing
- C. Yield
- D. Working
Explanation
The factor of safety compares the maximum or ultimate stress a component can withstand with the allowable working stress: FOS = ultimate stress ÷ working stress. Bearing and yield stresses are different design quantities.
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