Advanced WiringCâu 57 / 110
A location made hazardous by combustible dust is classified as which class?
a.Class II
b.Class I
c.Class III
d.Class IV
Giải thích
Class II locations are those hazardous because of the presence of combustible dust.
Trích dẫn luật: 2023 NEC 500.5(C)Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
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