An toànCâu 473 / 521
Immediately after you open a disconnect switch, all the conductors on the load side should be treated as:
a.Safe to handle right away
b.Safe as soon as the indicator light goes off
c.Safe after waiting about five seconds
d.Energized and dangerous until you have tested and verified the absence of voltage
Giải thích
Conductors must be treated as energized until a rated tester confirms the absence of voltage; a disconnect could be mislabeled, back-fed, or have stored energy. Assuming safety from an open switch, an indicator light, or a short wait has caused many electrocutions.
Trích dẫn luật: Cal/OSHA Title 8 §2320.1Luyện miễn phí toàn bộ 521 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- When an arc-flash risk assessment requires it, in addition to arc-rated clothing a worker must protect the face and head with:
- Standard electrical arc-flash PPE also includes head and hearing protection because:
- For electrical work, a hard hat should be:
- On de-energized conductors or equipment where accidental re-energization or induced voltage is possible, workers protect themselves by applying:
- In a dwelling, 125-volt 15- and 20-ampere receptacles must be GFCI-protected in which of the following groups of locations?
- What is the fundamental difference between AFCI and GFCI protection?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-10 Electrical Trade Examination · Quy trình kiểm tra