Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the main purpose of a crankcase heater in a refrigeration compressor?
A crankcase heater prevents refrigerant from condensing in the compressor oil during off-cycle periods by keeping the oil warmer than other parts of the system,
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Question: What is the main purpose of a crankcase heater in a refrigeration compressor?
Answer options: ✅ Prevent refrigerant migration to the compressor oil
- Maintain compressor oil viscosity
- Increase compressor efficiency during startup
- Reduce compressor noise
Correct answer: Prevent refrigerant migration to the compressor oil
Explanation: A crankcase heater prevents refrigerant from condensing in the compressor oil during off-cycle periods by keeping the oil warmer than other parts of the system, reducing slugging potential.
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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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