Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the primary control method for preventing coil freeze-up in an air conditioning evaporator?
The low-pressure switch (or freeze stat) monitors the evaporator pressure/temperature and shuts down the compressor if it drops too low, indicating potential ic
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Question: What is the primary control method for preventing coil freeze-up in an air conditioning evaporator?
Answer options: ✅ Low-pressure switch.
- High-pressure switch.
- Thermostat.
- Overload relay.
Correct answer: Low-pressure switch.
Explanation: The low-pressure switch (or freeze stat) monitors the evaporator pressure/temperature and shuts down the compressor if it drops too low, indicating potential ice formation.
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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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