Refrigeration & Air Conditioning Mechanic Red Seal · Question
A commercial walk-in cooler with a capillary tube expansion device is running constantly, but the temperature never reaches the setpoint. The suction line heavily frosts back to the compressor, and the compressor is covered in frost. What problem does this indicate?
Excessive frosting of the suction line and compressor, coupled with continuous operation and inadequate cooling, is characteristic of a refrigerant overcharge i
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
Question: A commercial walk-in cooler with a capillary tube expansion device is running constantly, but the temperature never reaches the setpoint. The suction line heavily frosts back to the compressor, and the compressor is covered in frost. What problem does this indicate?
Answer options:
- Dirty evaporator coil
- Evaporator fan failure ✅ Refrigerant overcharge
- Capillary tube restriction
Correct answer: Refrigerant overcharge
Explanation: Excessive frosting of the suction line and compressor, coupled with continuous operation and inadequate cooling, is characteristic of a refrigerant overcharge in a capillary tube system. This leads to evaporator flooding and high suction pressure.
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.