After a fire has been extinguished in a closed space, personnel may safely enter the space when _____.
所属题库：二管轮
题目介绍:
Afterafirehasbeenextinguishedinaclosedspacepersonnelmaysafelyenterthe
spacewhen_____.,
smoke density has been decreased sufficiently to see the bulkhead opposite thecompartment s entrance?a lifeline and explosion proof flash light are used?all smoke and toxic fumes are removed and an adequate oxygen supply is present?overhaul has been completed to remove any possible source of re-ignition? 本题为最佳选择题收录于二管轮题库中。
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