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33.配電回路裝接過多的負載時,回路上所安裝的過電流保護裝置失效,則導線因通過大量電流,易使絕緣起火燃燒。通常聚氯乙烯電線流通過約幾倍以上電流,其絕緣即會起火燃燒?(A) 1.5 (B) 3 (C)
問題詳情
33.配電回路裝接過多的負載時,回路上所安裝的過電流保護裝置失效,則導線因通過大量電流,易使絕緣起火燃燒。通常聚氯乙烯電線流通過約幾倍以上電流,其絕緣即會起火燃燒?
(A) 1.5
(B) 3
(C) 4.5
(D) 6
參考答案
答案:B
難度:適中0.6
統計:A(12),B(60),C(5),D(3),E(0)
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