Engine 2014: General Subjects

1. A of steel or equivalent metal construction, suitably stiffened and made intact from deck to deck and to shell or other boundaries
2. B of approved incombustible materials, but need meet no requirements relative to the passage of flame
3. C that if subjected to a standard fire test, they would be capable of preventing the passage of flame for one half hour
4. D that if subjected to the standard fire test, they would be  capable of preventing the passage of flame and smoke for one hour

Tip: press A-D to answer