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  1. ...you smell any gas or suspect of a leak, you must 1) turn off the gas meter control valve immediately. 2) extinguish any naked flames nearby. 3) open windows and...

    分類:科學及數學 > 化學 2007年02月14日

  2. ... system/no breach 2012-09-10 14:58:04 補充: for 1, is there really a safety problem? MAYBE: harmful volatile reactants and products may leak as gas and then inhaled for 2, if valve settings are improper, pressure may built up insude the system and...

    分類:科學及數學 > 化學 2012年09月14日

  3. ... on the side of the bunsen burner -- not to be confused with the needle valve for gas flow adjustment). 1. air hole closed ( Safety flame) 2. air hole half open 3. air hole nearly fully open 4. air hole fully open (...

    分類:科學及數學 > 化學 2007年12月20日

  4. ... of the lighter which are in close proximity to the valve . Safety : As matches, lighters, and other heat sources ...

    分類:科學及數學 > 化學 2008年10月03日

  5. ... (holes on the side of the bunsen burner -- not to beconfused with the needle valve for gas flow adjustment). 1. air baffleclosed ( Safety flame) 2. air baffle half open 3. air baffle nearlyfully open 4. air baffle fully open. 1...

    分類:科學及數學 > 化學 2010年07月26日

  6. ... on the side of the bunsen burner -- not to be confused with the needle valve for gas flow adjustment). 1. air baffle closed ( Safety flame) 2. air baffle half open 3. air baffle nearly fully open 4. air baffle fully open

    分類:科學及數學 > 化學 2011年10月30日