Regulations & Safety第 64 / 240 题
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
解析
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.
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