Preview Questions HVAC Technician | Role Specific Skill

Question 1: In terms of energy efficiency, why is it important to regularly maintain the evaporator coils in an HVAC system?

Which action should you take?

Choose only one option

It increases refrigerant flow, improving system capacity

It ensures that the system operates at full cooling capacity

It reduces the electrical consumption of the system

Dirty evaporator coils reduce the system's efficiency by restricting airflow and heat transfer

Question 2: In system design, what is the main benefit of integrating energy recovery ventilation (ERV) systems?

Which action should you take?

Choose only one option

Reduced energy consumption

Increased thermal efficiency and humidity control

Improved system air quality

Increased ductwork complexity

Question 3: During the operation of an HVAC system, what is the role of the expansion valve?

Which action should you take?

Choose only one option

To monitor temperature and adjust fan speed

To filter refrigerants and remove impurities

To increase system pressure and temperature for better efficiency

To regulate refrigerant flow into the evaporator coil, adjusting pressure and temperature

Question 4: What is the primary reason for performing a pressure test on HVAC refrigerant lines after installation?

Which action should you take?

Choose only one option

To measure the airflow through the system

To ensure there are no leaks before charging the system with refrigerant

To determine the exact refrigerant type needed for the system

To check the electrical connections in the compressor

Question 5: What is the most likely cause of an HVAC system running constantly without reaching the set temperature?

Which action should you take?

Choose only one option

A correctly functioning system working too efficiently

Improper refrigerant charge or airflow restrictions

A fully charged compressor

A perfectly sized system for the space

Question 6: If an HVAC system is blowing cold air when heating is required, what should be checked first?

Which action should you take?

Choose only one option

The refrigerant charge and compressor operation

The air filters and condenser coils

The heat exchanger, thermostat settings, and the condition of the heating elements

The airflow direction and fan settings