SafetyCâu 671 / 700
An electrician will work near energized conductors up to 20 kV. Which class of hard hat is designed to protect against that level of electrical contact?
a.Class G (General)
b.Class E (Electrical)
c.Class C (Conductive)
d.Class C with a metal shell for durability
Giải thích
Correct: Class E (Electrical) hard hats are tested to withstand roughly 20,000 volts and are intended for electrical work. Class G (General) is tested only to about 2,200 volts, so it is inadequate near 20 kV. Class C (Conductive) offers no electrical protection at all and may contain conductive material. A metal-shell hat would increase the shock hazard, not reduce it.
Luyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
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