Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the primary method of defrosting for a low-temperature freezer evaporator?
For low-temperature freezers, electric defrost is most common as off-cycle and air defrost are insufficient, and hot gas can be complex.
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Question: What is the primary method of defrosting for a low-temperature freezer evaporator?
Answer options:
- Hot gas defrost
- Off-cycle defrost ✅ Electric defrost
- Air defrost
Correct answer: Electric defrost
Explanation: For low-temperature freezers, electric defrost is most common as off-cycle and air defrost are insufficient, and hot gas can be complex.
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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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