Refrigeration & Air Conditioning Mechanic Red Seal · Question
When performing a leak test on a system charged with nitrogen, what is the maximum pressure typically recommended to avoid damaging components?
Always refer to the manufacturer's specified maximum test pressure for the weakest component in the system to prevent damage.
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Question: When performing a leak test on a system charged with nitrogen, what is the maximum pressure typically recommended to avoid damaging components?
Answer options: ✅ Manufacturer's rated pressure for the lowest-rated component
- 500 psi
- Atmospheric pressure
- System operating pressure plus 10%
Correct answer: Manufacturer's rated pressure for the lowest-rated component
Explanation: Always refer to the manufacturer's specified maximum test pressure for the weakest component in the system to prevent damage.
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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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