Refrigeration & Air Conditioning Mechanic Red Seal · Question
What is the primary function of a crankcase heater on a compressor?
During the off-cycle, liquid refrigerant can migrate to the colder compressor crankcase. The heater keeps the oil warm, preventing refrigerant from condensing i
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
Question: What is the primary function of a crankcase heater on a compressor?
Answer options:
- To preheat the oil before compressor startup ✅ To prevent liquid refrigerant from migrating to and diluting the oil in the crankcase during the off-cycle
- To increase the compressor's efficiency
- To cool the compressor oil during operation
Correct answer: To prevent liquid refrigerant from migrating to and diluting the oil in the crankcase during the off-cycle
Explanation: During the off-cycle, liquid refrigerant can migrate to the colder compressor crankcase. The heater keeps the oil warm, preventing refrigerant from condensing into and diluting the oil, which could lead to compressor damage upon startup.
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
More about Refrigeration & Air Conditioning Mechanic Red Seal
Related Questions
- 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
- Which type of electric motor requires a capacitor for starting and running, offering higher efficiency and bet
- When evacuating a refrigeration system, what is the recommended deep vacuum level, typically measured in micro
More for Refrigeration & Air Conditioning Mechanic Red Seal candidates
FAQs
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
Ready to practice?
Free, no signup required. Build a wrong-question list as you go.
Start Free Refrigeration & Air Conditioning Mechanic Red Seal Practice →Related courses
Other Canadian certifications candidates often prepare for alongside this one.