Engine: Engineering Safety

1. A "B" class bulkheads must not allow flame or smoke passage for 15 minutes when subjected to a fire test.
2. B "B" class bulkheads must not allow flame passage for 30 minutes when subjected to a fire test.
3. C "B" class bulkheads must not allow flame passage for 60 minutes when subjected to a fire test.
4. D "B" class bulkheads must not allow flame passage for 120 minutes when subjected to a fire test.

Tip: press A-D to answer