单选题
A7.74%～35.31%
B13.5%～88%
C40%～73.5%
D19%～71%
正确答案
答案解析
该燃气火焰传播极限为：L1=100/[15.34/22+58.98/11+19.9/5.0+5.77/2.0]=7.74%Lh=100/(15.34/68+58.98/75+19.9/15+5.77/11.7)=35.31%
A7.74%～35.31%
B13.5%～88%
C40%～73.5%
D19%～71%
该燃气火焰传播极限为：L1=100/[15.34/22+58.98/11+19.9/5.0+5.77/2.0]=7.74%Lh=100/(15.34/68+58.98/75+19.9/15+5.77/11.7)=35.31%