MSC.1/Circ.1312 – Foam Concentrates for Fixed Fire-Extinguishing Systems – Set B

Source: MSC.1/Circular.1312 – Revised Guidelines for the Performance and Testing Criteria, and Surveys of Foam Concentrates for Fixed Fire-Extinguishing Systems (10 June 2009), Annex.
Reference: imorules.com – MSC.1/Circ.1312

Question 3 of 10

3. "25% (50%) drainage time" is the time for:

A) 25% (50%) of the liquid content of a foam to drain out B) 25% (50%) of the tray surface to be covered by sustained flames C) 25% (50%) of the foam concentrate in the tank to be consumed D) 25% (50%) of the sediment to pass through a 180 µm sieve

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