Preview Questions HVAC Technician | Role Specific Skill

Question 1: How does using a zoned HVAC system improve energy efficiency?

Which action should you take?

Choose only one option

It allows for targeted heating or cooling in specific areas, reducing energy use in unoccupied spaces

It requires less maintenance, thereby saving energy

It reduces system capacity by limiting airflow

It increases energy consumption by running all zones simultaneously

Question 2: How should the technician check the efficiency of the evaporator coil during HVAC system maintenance?

Which action should you take?

Choose only one option

By inspecting the coil for visible signs of damage and cleaning it

By assessing the refrigerant charge without checking airflow

By testing the electrical components of the system only

By measuring the temperature difference between the air entering and exiting the coil

Question 3: Which of the following is the main function of a defrost cycle in an HVAC heat pump system?

Which action should you take?

Choose only one option

To cool the air before it enters the ductwork

To increase system efficiency during summer months

To remove ice buildup on the outdoor coil during cold weather

To reduce refrigerant pressure in the system

Question 4: What is the impact of improper thermostat calibration on energy efficiency?

Which action should you take?

Choose only one option

It can cause the system to overheat or overcool, leading to unnecessary energy consumption

It only affects cooling efficiency, not heating

It has no impact as long as the system is set to the correct temperature

It causes the system to run intermittently, saving energy

Question 5: When troubleshooting an HVAC system, what could be the cause of fluctuating indoor temperatures despite stable thermostat settings?

Which action should you take?

Choose only one option

Incorrect refrigerant charge or compressor malfunction

Low refrigerant levels in the system

Damaged ducts leaking conditioned air

Airflow restrictions or issues with the thermostat calibration

Question 6: In the psychrometric chart, which parameter is typically plotted along the x-axis?

Which action should you take?

Choose only one option

Dry-bulb temperature

Humidity ratio

Wet-bulb temperature

Enthalpy