Refrigeration & Air Conditioning Mechanic Red Seal · Question
A scroll compressor is making an unusual 'grinding' noise. The system pressures appear somewhat normal, but the cooling capacity is reduced. What might be indicated?
A grinding noise in a scroll compressor, especially with reduced capacity, suggests internal mechanical wear between the fixed and orbiting scrolls. This wear c
Start free practice for Refrigeration & Air Conditioning Mechanic Red Seal
500 questions · no signup required · 40 free questions per day
Question: A scroll compressor is making an unusual 'grinding' noise. The system pressures appear somewhat normal, but the cooling capacity is reduced. What might be indicated?
Answer options:
- Refrigerant overcharge ✅ Internal scroll wear or damage
- Loose compressor mounting bolts
- Low system superheat
Correct answer: Internal scroll wear or damage
Explanation: A grinding noise in a scroll compressor, especially with reduced capacity, suggests internal mechanical wear between the fixed and orbiting scrolls. This wear compromises the sealing surfaces and overall volumetric efficiency.
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.