A.7.74%～35.31% B.13.5%～88% C.40%～73.5%

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问题

A.7.74%～35.31%B.13.5%～88%C.40%～73.5%D.19%～71%

选项 A.7.74%～35.31%
B.13.5%～88%
C.40%～73.5%
D.19%～71%

答案 A

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%

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