Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component ()

A . Wear rubber gloves and boots B . Use only approved non-conducting tools C . Ground the case of the machine before beginning any repairs D . Open the supply circuits and tag the switche

时间:2022-09-24 15:42:36 所属题库:船舶电气与船舶安全题库

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