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One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points; Question 507

2016-05-01View Original

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Multiple-choice question: The selection of the appropriate value for the safe voltage depends on factors such as the operating environment and usage methods. The safe voltage to be used for handheld lighting devices in particularly hazardous environments such as acetylene generators is (  )V ; The safe voltage for handheld lighting lamps in underwater working environments is ( ) V.   A.12,6   B.6,6   C.12,12   D.6,12  Correct answer: A,

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