Preview Questions HVAC Technician | Role Specific Skill

Question 1: Which regulation governs the installation of air conditioning systems in areas prone to mold growth?

Which action should you take?

Choose only one option

The NFPA 70, which defines electrical safety in HVAC systems

The International Mechanical Code (IMC), which regulates duct systems

The OSHA 1926.57 regulation on ventilation and respiratory protection

The ASHRAE 62.1 ventilation standard, which addresses indoor air quality

Question 2: When troubleshooting an HVAC system that is not cooling properly, what could be the issue with the expansion valve?

Which action should you take?

Choose only one option

The system is low on refrigerant

The condenser coil is dirty

The valve could be clogged or malfunctioning, causing improper refrigerant flow

The compressor is overcharged

Question 3: 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 4: When designing a cooling system for a server room, what is the most critical factor?

Which action should you take?

Choose only one option

The system should use as little energy as possible

The system must handle high heat loads and maintain stable temperatures

The system must be easily scalable

The system should be able to operate autonomously

Question 5: In HVAC system design, what is the primary function of an air handler unit (AHU)?

Which action should you take?

Choose only one option

To regulate refrigerant flow between the evaporator and condenser

To filter out large particles from the air

To circulate air through the duct system and integrate heating or cooling elements

To reduce the energy consumption of the compressor

Question 6: How do you test for refrigerant leaks after completing a new installation?

Which action should you take?

Choose only one option

Rely on the system's built-in leak detection feature only

Use a refrigerant leak detector or soapy water to check connections

Check the system's operating pressure and assume no leaks

Inspect only the refrigerant lines visually without testing