MSC.1/Circ.1312 – Foam Concentrates for Fixed Fire-Extinguishing Systems – Set E
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 4 of 10
4. Surface tension Ts is determined at 20 ± 2ºC using the ring or plate method of: