Regulations & SafetyCâu 52 / 240
Which toxic gas is a well-known decomposition product formed when a chlorinated refrigerant contacts a flame?
a.Oxygen
b.Helium
c.Nitrogen
d.Phosgene
Giải thích
Phosgene is a highly toxic gas that can form when a chlorinated refrigerant such as R-22 contacts an open flame or hot surface, and even small amounts are dangerous to inhale. Oxygen, helium, and nitrogen are not toxic decomposition products of refrigerant. The presence of a sharp, acrid odor near hot work is a warning sign to stop and ventilate.
Luyện miễn phí toàn bộ 240 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- 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?
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- 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:
- A technician receives 'empty' return cylinders from a job. Which practice is safe and legal?
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