Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the primary safety concern when working with ammonia (R-717) as a refrigerant?
Ammonia is a highly efficient natural refrigerant but is both toxic and flammable, requiring strict safety protocols, specialized equipment, and extensive venti
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Question: What is the primary safety concern when working with ammonia (R-717) as a refrigerant?
Answer options:
- High Global Warming Potential (GWP) ✅ Its extreme toxicity and flammability
- Its ozone-depleting potential
- Its very low boiling point leading to severe frostbite
Correct answer: Its extreme toxicity and flammability
Explanation: Ammonia is a highly efficient natural refrigerant but is both toxic and flammable, requiring strict safety protocols, specialized equipment, and extensive ventilation for its handling.
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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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