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Question 1: What is the main purpose of an expansion valve in an HVAC system?

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Question 2: How often should the condenser coils be cleaned to ensure optimal performance?

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Question 3: What is the purpose of a differential pressure switch in an HVAC system?

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Question 4: What is the typical refrigerant charge formula used for HVAC system design?

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Question 5: What is the significance of the ductwork design in an HVAC system?

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Question 6: How can a technician detect a refrigerant leak during preventative maintenance?

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