SafetyCâu 530 / 700
A worker will enter a below-grade vault that may contain low oxygen or toxic gas. What is the BEST practice before entry into this permit-required confined space?
a.Enter quickly and leave if it feels stuffy
b.Test the atmosphere, provide ventilation, use an attendant and rescue plan, and follow confined-space entry procedures
c.Light a match to check for gas
d.Send in the newest worker to check it first
Giải thích
A permit-required confined space demands atmospheric testing for oxygen, flammable gas, and toxics before and during entry, forced ventilation, a trained attendant outside, communication, and a rescue plan. Option b reflects this. Entering on feel (a) can cause rapid collapse, an open flame (c) can ignite gas, and sending an untrained worker (d) endangers a life; confined spaces can be immediately fatal without controls.
Trích dẫn luật: Cal/OSHA Title 8, Construction Safety OrdersLuyện miễn phí toàn bộ 700 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Spoil (excavated soil) is being placed next to an open trench. Where should the spoil pile be kept to reduce cave-in risk?
- A general contractor holds a weekly toolbox safety meeting. What is the PRIMARY safety-program benefit of documenting these meetings and near-miss reports?
- A lane closure is set up on a higher-speed roadway. According to California MUTCD principles, what is the FIRST element a driver should encounter approaching the work zone?
- A worker will use a personal fall arrest system tied to a single anchor point. What is the MINIMUM anchorage strength Cal/OSHA generally requires per attached worker?
- Under Cal/OSHA heat illness prevention rules for outdoor work, at approximately what temperature must the employer make shade available upon request and when workers take breaks?
- At what approximate temperature do Cal/OSHA high-heat procedures (such as extra observation and reminders to drink water) generally take effect?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB General Building (B) Trade Examination · Quy trình kiểm tra