Discussion
Consider the following statements about fail-safe design:
1. It provides an alternative load path if one member fails.
2. It relies on damage being found by inspection before the second path fails.
3. It removes the need for any scheduled inspection.
Which of the statements given above is or are correct?
Answer: B
The first two together define the philosophy. The third inverts it: fail-safe design depends absolutely on inspection, since the redundancy only buys time between the first failure and its discovery. It is safe-life design that avoids relying on inspection.
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