An toànCâu 467 / 521
When working within the restricted approach boundary of exposed energized parts, hand tools should be:
a.Insulated/voltage-rated tools designed for the voltage being worked on
b.Any chrome-plated tools that look clean
c.Ordinary tools wrapped in a layer of electrical tape
d.Not a concern because gloves alone are enough
Giải thích
Energized work within the restricted approach boundary requires insulated, voltage-rated hand tools to prevent a fault or shock if a tool contacts a live part. Chrome tools, tools wrapped in tape, or relying on gloves alone do not provide the tested insulation that rated tools offer.
Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- An unqualified worker must walk past an open 480V panel with exposed live parts to reach a work area. What must happen?
- An arc-flash hazard warning label applied to equipment should list information such as:
- Which equipment, when likely to require examination or servicing while energized, must be field- or factory-marked to warn of potential arc-flash hazards?
- To protect other workers from an area where justified energized work is being performed, the qualified person should:
- Class 00 and Class 0 rubber insulating gloves are rated for maximum AC use voltages of approximately:
- When an arc-flash risk assessment requires it, in addition to arc-rated clothing a worker must protect the face and head with:
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