Discussion
Crash survivability requirements for a memory module.
| Test | Representative condition |
|---|---|
| Impact shock | 3400 g for 6.5 milliseconds |
| Static crush | Sustained load from wreckage |
| Fire | High intensity then low intensity burn |
| Immersion | Prolonged submersion at depth |
Why must the same unit pass every test in sequence?
Answer: C
Correct answer: Insults arrive one after another
A real accident does not present the tests separately. The unit decelerates, is crushed by structure, burns in the fuel fire and then lies submerged - each condition acting on a module already damaged by the last.
Testing the same unit in sequence reproduces that accumulation. A module might survive fire alone and fail it after being crushed, its seals already broken. Passing the tests on four fresh units would prove nothing about the case that matters.
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