Refrigeration & Air Conditioning Mechanic Red Seal · Question
A thermostatic expansion valve (TXV) responds to which two variables to maintain a constant superheat?
The TXV's sensing bulb measures evaporator outlet superheat, and the main diaphragm responds to both bulb pressure (temperature) and suction line pressure.
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Question: A thermostatic expansion valve (TXV) responds to which two variables to maintain a constant superheat?
Answer options: ✅ Evaporator outlet temperature and suction line pressure
- Evaporator inlet temperature and discharge line pressure
- Condenser outlet temperature and liquid line pressure
- Compressor suction temperature and ambient temperature
Correct answer: Evaporator outlet temperature and suction line pressure
Explanation: The TXV's sensing bulb measures evaporator outlet superheat, and the main diaphragm responds to both bulb pressure (temperature) and suction line pressure.
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- 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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