Regulations & SafetyCâu 64 / 240
A technician is about to recover refrigerant in a mechanical room. Which safety step best protects against oxygen displacement?
a.Ensuring adequate ventilation and using a refrigerant/oxygen monitor in confined spaces
b.Turning off the lights to see leaks better
c.Closing all doors to keep the refrigerant contained
d.Wearing tinted sunglasses
Giải thích
Because refrigerant can displace oxygen, the best protection is adequate ventilation and, in confined spaces, a refrigerant or oxygen-level monitor that alarms before conditions become dangerous. Sunglasses do not help, closing all doors would trap leaking refrigerant, and turning off lights does not improve safety. Never enter a space suspected of high refrigerant concentration without ventilation and monitoring.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A recovery or recycling machine used on high-pressure appliances must generally be certified to meet standards set by which organization on behalf of EPA?
- A technician notices the pressure relief valve on a recovery cylinder is corroded and weeping refrigerant. What is the correct action?
- Why is it important to never mix different refrigerants in the same recovery cylinder?
- After exceeding the leak rate threshold on a 50-plus-pound appliance and repairing the leak, the owner is generally required to:
- Which practice is safest when pressure-testing a system for leaks?
- A technician witnesses a coworker intentionally venting refrigerant to save time. Under EPA enforcement, what may EPA offer to individuals who report a violation?
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