An toànCâu 429 / 521
Rubber insulating gloves used for energized work on a 480V system must be:
a.Rated for the voltage, worn with leather protectors, and inspected/air-tested before use
b.Any leather work glove that fits
c.Cotton gloves worn under nitrile gloves
d.Only required for work above 1,000 volts
Giải thích
Voltage-rated rubber gloves must match or exceed the system voltage, be worn with leather protector gloves to prevent mechanical damage, and be inspected (and often air-tested) before each use. Leather or cotton alone provide no shock protection, and shock protection is required well below 1,000 volts.
Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- In NFPA 70E, the 'limited approach boundary' is best described as:
- Crossing the restricted approach boundary toward an exposed energized part requires:
- An arc-flash study shows an available incident energy of 8 cal/cm² at the working distance. The arc-rated clothing and PPE must have an arc rating of:
- Under Cal/OSHA and NFPA 70E, the primary/preferred way to protect workers from electrical hazards is to:
- An energized electrical work permit is generally required when:
- Before you rely on a voltage detector to verify absence of voltage, you should:
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