A technician is about to recover refrigerant in a mechanical room. Which safety step best protects against oxygen displacement?
Explanation
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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