Preview Questions HVAC Technician | Role Specific Skill

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

Which action should you take?

Choose only one option

To regulate the refrigerant flow

To remove moisture from the refrigerant

To increase system pressure

To lower system pressure

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

Which action should you take?

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Every 3 months

Every 6 months

Monthly

Annually

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

Which action should you take?

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To filter dust and debris from the return air

To regulate the refrigerant pressure throughout the system

To control the power supply to the HVAC unit based on temperature

To monitor airflow and shut down the system if airflow is insufficient

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

Which action should you take?

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Refrigerant weight = System airflow / Pressure

Refrigerant weight = Cooling load * System efficiency

Refrigerant weight = Cooling load / COP

Refrigerant weight = COP * Load factor

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

Which action should you take?

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It determines the refrigerant type

It is used only for heating purposes

It primarily focuses on aesthetic value

It ensures efficient airflow and distribution of conditioned air throughout the building

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

Which action should you take?

Choose only one option

By visually inspecting the evaporator coils for frost buildup

By checking the system's pressure and looking for signs of oil residue near the refrigerant lines

By adjusting the thermostat and checking for system response

By measuring the temperature differential between the evaporator and condenser