div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: How is the fire extinguished By volume air contains approximately oxygen 78% nitrogen and 1% other gases Continuous combustion requires more than 15% of oxygen concentration by src=https:reader033vdocumentsusreader033viewer20220421175e94eed14bf2bf6ea86ac18dhtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: How is the fire extinguished By volume air contains approximately oxygen 78% nitrogen and 1% other gases Continuous combustion requires more than 15% of oxygen concentration by src=https:reader033vdocumentsusreader033viewer20220421175e94eed14bf2bf6ea86ac18dhtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: How is the fire extinguished By volume air contains approximately oxygen 78% nitrogen and 1% other gases Continuous combustion requires more than 15% of oxygen concentration by src=https:reader033vdocumentsusreader033viewer20220421175e94eed14bf2bf6ea86ac18dhtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: How is the fire extinguished By volume air contains approximately oxygen 78% nitrogen and 1% other gases Continuous combustion requires more than 15% of oxygen concentration by src=https:reader033vdocumentsusreader033viewer20220421175e94eed14bf2bf6ea86ac18dhtml5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: How is the fire extinguished By volume air contains approximately oxygen 78% nitrogen and 1% other gases Continuous combustion requires more than 15% of oxygen concentration by src=https:reader033vdocumentsusreader033viewer20220421175e94eed14bf2bf6ea86ac18dhtml5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdiv