Refrigeration & Air Conditioning Mechanic Red Seal · Question
According to Canadian safety regulations, what is the maximum permissible concentration of refrigerant in an occupied space before an alarm is required?
Canadian safety codes (e.g., CSA B52) specify that refrigerant leak detection and alarms are required when concentrations could exceed the refrigerant's specifi
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Question: According to Canadian safety regulations, what is the maximum permissible concentration of refrigerant in an occupied space before an alarm is required?
Answer options: ✅ Based on the specific refrigerant's AEL (Allowable Exposure Limit) or LEL/LFL if flammable.
- 500 ppm for all refrigerants.
- 1000 ppm for all refrigerants.
- There is no specific alarm requirement for occupied spaces.
Correct answer: Based on the specific refrigerant's AEL (Allowable Exposure Limit) or LEL/LFL if flammable.
Explanation: Canadian safety codes (e.g., CSA B52) specify that refrigerant leak detection and alarms are required when concentrations could exceed the refrigerant's specific AEL or flammability limits.
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- 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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