One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； Question 289
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Fill-in-the-blank: The threshold for performing hot work on pipelines and equipment containing acetylene is ( ), and the threshold for such work on pipelines and equipment containing C2H3Cl is ( ). Answer: 0.2%, 0.2%
Acetylene volume < 0.23%------C2H3CL volume < 0.5%
The limit for working on pipes and equipment containing acetylene is (0.5%), but I really don’t know the limit for working on pipes and equipment containing C2H3Cl.
The threshold for working on pipes and equipment containing acetylene is (acetylene content below 0.5%), while the threshold for working on pipes and equipment containing C2H3Cl is (C2H3Cl content less than 0.4%).
The criteria for working on pipes and equipment containing acetylene are (oxygen content ≤ 3%, acetylene content ≤ 0.20%), while the criteria for working on pipes and equipment containing C2H3Cl are (oxygen content ≤ 3%, C2H3Cl percentage ≤ 0.40%).
The limit for working on pipes and equipment containing acetylene is (acetylene ≤ 0.20%), while the limit for working on pipes and equipment containing C2H3Cl is (C2H3Cl ≤ 0.40%).
The permissible limit for working on pipes and equipment containing acetylene is 0.2%
The allowable limit for working on pipes and equipment containing acetylene is (less than 0.5%), while the allowable limit for working on pipes and equipment containing C2H3Cl is (less than 0.2%).
The ignition threshold for pipelines and equipment containing acetylene is ( ), while the ignition threshold for those containing C2H3Cl is ( ). acetylene
The allowable concentration for working on pipes and equipment containing acetylene is (less than or equal to 0.2%), and the same applies to pipes and equipment containing C2H3Cl (concentration less than or equal to 0.2%).