Preview Questions HVAC Technician | Role Specific Skill

Question 1: If an HVAC system is producing a strange odor when operating, what could be the cause?

Which action should you take?

Choose only one option

A moldy or dirty evaporator coil or ductwork

A clogged air filter creating dust buildup

Low refrigerant levels creating chemical reactions

A malfunctioning compressor causing overheating

Question 2: What is the primary purpose of a capacitor in an HVAC system, and how is it tested?

Which action should you take?

Choose only one option

To manage air circulation; checked by observing airflow patterns

To control the refrigerant flow; it is checked by inspecting system pressure

To store and release electrical energy to the compressor and fan motor; it should be tested using a multimeter to check capacitance

To provide backup power to the system during outages; tested by measuring voltage levels

Question 3: How does the proper sizing of HVAC equipment contribute to energy efficiency in construction projects?

Which action should you take?

Choose only one option

Proper sizing does not impact energy efficiency

Correctly sized systems avoid over- or under-sizing, ensuring optimal performance and minimal energy waste

Larger systems are always more energy-efficient

Smaller systems use less energy but provide insufficient cooling or heating

Question 4: When performing an HVAC system repair, what is the first step in diagnosing issues with the compressor?

Which action should you take?

Choose only one option

Replace the compressor immediately

Focus on the system's wiring and ignore the compressor

Increase the power supply to the compressor

Check for electrical faults, refrigerant level, and any visible damage to the compressor

Question 5: 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 6: Under ASHRAE Standard 15, what is required when installing refrigerants in HVAC systems with a capacity over 1,000 pounds?

Which action should you take?

Choose only one option

The installation must include leak detection and safety systems to prevent harmful refrigerant release

The system must be installed only by licensed engineers

The use of non-flammable refrigerants is mandatory in all systems

Only CO2 refrigerants can be used in large-capacity HVAC systems