Class B fires are best extinguished by smothering, i-e().
In setting the valves on a steam-smothering system on a tank vessel,the master control valve to cargo tanks should be().
Class B fires are best extinguished by smothering, i-e().
In setting the valves on a steam-smothering system on a tanker,the master control valve to cargo tanks should be().
Foam is a very effective smothering agent and().