Refrigeration & Air Conditioning Mechanic Red Seal · Question
If a refrigeration system is operating with a low suction pressure and a high discharge pressure, what is a likely cause?
An undercharge of refrigerant can lead to reduced mass flow, resulting in low suction pressure and often higher discharge pressure due to less effective cooling
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Question: If a refrigeration system is operating with a low suction pressure and a high discharge pressure, what is a likely cause?
Answer options: ✅ Refrigerant undercharge
- Overcharge of refrigerant
- Dirty condenser coil
- Oversized expansion valve
Correct answer: Refrigerant undercharge
Explanation: An undercharge of refrigerant can lead to reduced mass flow, resulting in low suction pressure and often higher discharge pressure due to less effective cooling in the condenser.
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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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