Refrigeration & Air Conditioning Mechanic Red Seal · Question
An HVACR technician is called to inspect a leak in a large walk-in freezer located in the basement of a restaurant. The basement has limited ventilation and is difficult to access. Prior to entry, what is the primary concern regarding refrigerant safety?
In poorly ventilated confined spaces, the primary danger from refrigerant leaks (especially non-flammable types) is that the refrigerant vapor can displace oxyg
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Question: An HVACR technician is called to inspect a leak in a large walk-in freezer located in the basement of a restaurant. The basement has limited ventilation and is difficult to access. Prior to entry, what is the primary concern regarding refrigerant safety?
Answer options: ✅ The potential for asphyxiation due to refrigerant displacing oxygen
- The flammability hazard of the refrigerant in the confined space
- The risk of frostbite from contact with leaking liquid refrigerant
- The corrosive effect of refrigerant on electrical components
Correct answer: The potential for asphyxiation due to refrigerant displacing oxygen
Explanation: In poorly ventilated confined spaces, the primary danger from refrigerant leaks (especially non-flammable types) is that the refrigerant vapor can displace oxygen, leading to asphyxiation, which is rapidly incapacitating and often fatal.
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Question explanations
- Which of the following refrigerants is a hydrofluorocarbon (HFC) and has a high ozone depletion potential (ODP
- Which component is responsible for compressing the refrigerant vapour to a high pressure and temperature?
- According to the Canadian Electrical Code (CEC), what is the minimum required working clearance in front of el
- What is the main operating characteristic difference between a fixed orifice (capillary tube) and a Thermostat
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