Preview Questions HVAC Technician | Role Specific Skill

Question 1: What is the purpose of inspecting and tightening electrical connections during preventative maintenance?

Which action should you take?

Choose only one option

To prevent electrical shorts

To reduce energy consumption

To ensure proper voltage flow

To prevent overheating of components

Question 2: What is the primary advantage of using a variable speed fan in an HVAC system for energy efficiency?

Which action should you take?

Choose only one option

It increases airflow consistently, ensuring maximum cooling

It improves system aesthetics and reduces noise

It reduces initial installation costs and complexity

It adjusts fan speed to match the demand, reducing energy consumption and improving comfort

Question 3: In an HVAC system, what is the primary function of the expansion valve?

Which action should you take?

Choose only one option

To release heat absorbed by the refrigerant

To compress the refrigerant and circulate it through the coils

To control the flow of refrigerant into the evaporator based on pressure and temperature

To ensure the refrigerant is clean and free of contaminants

Question 4: In accordance with the National Fire Protection Association (NFPA) Standard 90A, what is the key consideration when installing HVAC systems in commercial buildings?

Which action should you take?

Choose only one option

Ensuring that the system meets fire safety standards for air ducts and equipment

Limiting the number of mechanical components used in HVAC systems

Ensuring that HVAC systems use only renewable energy sources

Installing HVAC systems with minimal electrical connections

Question 5: What should a technician check if an HVAC system is making unusual noises, such as grinding or rattling?

Which action should you take?

Choose only one option

Add lubrication to the compressor

Replace the air filters

Inspect the fan blades, blower motor, and condenser fan for damage or debris

Check the refrigerant levels

Question 6: In an HVAC system design, why is proper insulation of ducts critical?

Which action should you take?

Choose only one option

It reduces heat loss and energy consumption, improving system efficiency

It prevents refrigerant leaks

It increases the system's cooling capacity

It reduces the system's airflow