Preview Questions HVAC Technician | Role Specific Skill

Question 1: How do economizers improve the energy efficiency of HVAC systems?

Which action should you take?

Choose only one option

They allow the system to use outside air for cooling when conditions are suitable, reducing the need for mechanical cooling

They regulate indoor humidity levels

They increase refrigerant flow for better cooling

They reduce the noise levels of the system

Question 2: How can zone control systems contribute to HVAC energy efficiency?

Which action should you take?

Choose only one option

They focus on heating or cooling the building at full capacity

They allow temperature to be controlled independently in different areas of the building, preventing unnecessary heating or cooling

They decrease system capacity to save energy at the expense of comfort

They reduce the overall cooling capacity of the system

Question 3: If an HVAC system is producing weak airflow despite the fan running, what should be checked first?

Which action should you take?

Choose only one option

The refrigerant charge and compressor operation

The air filter and the blower motor for malfunction

The thermostat for improper settings

The evaporator coil for ice buildup

Question 4: What is the purpose of a capacitor in an HVAC motor?

Which action should you take?

Choose only one option

To regulate refrigerant pressure

To store electrical energy and provide a boost to the motor at startup

To filter air entering the system

To prevent system overheating

Question 5: What is the most likely cause of HVAC system overheating during operation?

Which action should you take?

Choose only one option

Low fan speed

Too much refrigerant charge

A blocked or dirty air filter, insufficient airflow, or refrigerant issues

Faulty thermostat

Question 6: What is the maximum allowable level of refrigerant leakage that requires corrective action under EPA regulations?

Which action should you take?

Choose only one option

Leaks are allowed if the refrigerant charge is within the recommended limits

There is no maximum allowed; all leaks must be reported

Any detectable leak of refrigerant that exceeds 15% per year requires corrective action

Leaks that cause a decrease in system cooling efficiency