Preview Questions HVAC Technician | Role Specific Skill

Question 1: What would be the most significant factor in selecting an HVAC system type for a multi-story building?

Which action should you take?

Choose only one option

The location of the HVAC system

The age of the building

Building load and heating/cooling demand

The building's airflow capacity

Question 2: How should an HVAC technician troubleshoot a system that is not cooling properly but the compressor is running?

Which action should you take?

Choose only one option

Check the refrigerant charge and inspect the evaporator and condenser coils

Increase the fan speed

Replace the compressor immediately

Increase refrigerant charge

Question 3: How do you identify a problem with the compressor in an HVAC system?

Which action should you take?

Choose only one option

By cleaning the compressor area without electrical tests

By checking the refrigerant charge only

By measuring airflow before and after the compressor

By checking the compressor's voltage, current draw, and listening for unusual noises

Question 4: How can you prevent refrigerant contamination during the installation of a new HVAC system?

Which action should you take?

Choose only one option

Rely on the refrigerant lines themselves to prevent contamination

Use clean, dry nitrogen to purge the system before refrigerant is added, and ensure all components are sealed

Leave the refrigerant lines open until the system is ready to operate

Use any available refrigerant to fill the system, regardless of cleanliness

Question 5: Why is it important to regularly check and clean the condenser coils in an HVAC system?

Which action should you take?

Choose only one option

To reduce air pollution from the system

To ensure refrigerant flows smoothly

To improve heat transfer efficiency and prevent overheating of the compressor

To keep the fan motor in good condition

Question 6: During HVAC system repair, what is the likely cause of system failure if there is a humming sound but no cooling or heating output?

Which action should you take?

Choose only one option

A clogged air filter restricting airflow

A refrigerant leak causing low pressure

A faulty capacitor or electrical issue with the motor

An improperly calibrated thermostat