After a fire has been extinguished in a closed spa
After a fire has been extinguished in a closed space, personnel may safely enter the space when
A.smoke density has been decreased sufficiently to see the bulkhead opposite the compartment"s entrance
B.a lifeline and explosion proof flash light are used
C.all smoke and toxic fumes are removed and an adequate oxygen supply is present
D.overhaul has been completed to remove any possible source of re-ignition
请帮忙给出正确答案和分析，谢谢！
参考解答
46j***780
2024-06-15 00:19:42
正确答案：C
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