Regulations & Safety第 52 / 240 题
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
解析
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.
免费刷完整 240 道题库 — 无需注册。
同考点相关题目
- 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?
- 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 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?