Regulations & SafetyCâu 51 / 240
A technician is brazing near a line that still contains R-22 vapor. Why is exposing refrigerant to an open flame or very high heat dangerous?
a.It can decompose into toxic gases such as phosgene and HCl
b.It turns the refrigerant into harmless water vapor
c.It permanently improves the refrigerant's cooling ability
d.It has no effect because refrigerants are inert
Giải thích
When refrigerant contacts an open flame or very high heat, it can thermally decompose into toxic and corrosive gases such as phosgene, hydrogen chloride, and hydrogen fluoride, which are hazardous to breathe. It does not become harmless water vapor, improve performance, or stay inert. Systems should be recovered and purged before any hot work is performed nearby.
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Câu hỏi liên quan cùng chủ đề
- While transferring liquid refrigerant, a technician gets a splash on bare skin. What injury is most likely, and what is the correct first aid?
- Which personal protective equipment (PPE) is most appropriate whenever a technician handles pressurized refrigerant?
- A technician needs to warm a refrigerant cylinder to raise its pressure during charging. Which method is safe?
- Which toxic gas is a well-known decomposition product formed when a chlorinated refrigerant contacts a flame?
- A technician is filling a recovery cylinder with liquid refrigerant and it is approaching the 80 percent mark. Why must the cylinder never be overfilled?
- To avoid overfilling a recovery cylinder past 80 percent, the most reliable method is to:
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