RVTI Level 3 HVAC Specialist Certification Exam Questions And Correct Answers (Verified) Latest Update | Graded A+ | Guaranteed Pass.

RVTI Level 3 HVAC Specialist Certification Exam Questions And Correct Answers (Verified) Latest Update | Graded A+ | Guaranteed Pass. 1. What is the primary purpose of a variable refrigerant flow (VRF) system? a) To provide a constant cooling output regardless of load b) To allow individual zone control while optimizing energy efficiency c) To increase air velocity in ductwork d) To reduce the refrigerant pressure b) To allow individual zone control while optimizing energy efficiency VRF systems adjust refrigerant flow to match the demand of individual zones, improving efficiency and comfort. 2. Which of the following refrigerants has the lowest Global Warming Potential (GWP)? a) R-22 b) R-410A c) R-32 d) R-134a c) R-32 R-32 has a lower GWP compared to older refrigerants like R-410A or R22, making it more environmentally friendly. 3. What does SEER stand for in air conditioning systems? a) Seasonal Energy Efficiency Ratio b) Standard Energy Evaluation Rating c) Seasonal Efficiency Energy Ratio d) System Energy Efficiency Requirement a) Seasonal Energy Efficiency Ratio SEER measures the cooling output of an AC system over a typical cooling season divided by the energy consumed, indicating efficiency. 7. Which type of compressor is typically used in large chillers? a) Reciprocating b) Centrifugal c) Scroll d) Rotary b) Centrifugal Centrifugal compressors are preferred for large chillers due to their high capacity and efficiency at large scale. 8. What is the main advantage of using a variable speed drive (VSD) on HVAC fans? a) Reduces airflow b) Maintains constant pressure c) Saves energy by matching speed to demand d) Increases system noise c) Saves energy by matching speed to demand VSDs adjust motor speed to match system requirements, reducing energy consumption and wear. 9. In hydronic systems, what is the purpose of an expansion tank? a) To increase water pressure b) To absorb thermal expansion of water c) To store potable water d) To filter debris b) To absorb thermal expansion of water Expansion tanks prevent overpressure in closed-loop hydronic systems caused by heating water expansion. 10. Which method is used to measure airflow in ductwork? a) Manometer b) Anemometer c) Thermocouple d) Hygrometer b) Anemometer Anemometers measure air velocity, which can be used to calculate airflow in ducts. 11. What is the typical superheat range for a residential air conditioning system at the evaporator outlet? a) 0–5°F b) 5–15°F c) 15–25°F d) 25–35°F b) 5–15°F Proper superheat ensures the evaporator is fully utilized without risking liquid refrigerant entering the compressor. 12. What is the purpose of a condensate trap in an HVAC system? a) To remove refrigerant b) To prevent air leakage c) To prevent gases from entering the condensate line d) To collect water and prevent backflow d) To collect water and prevent backflow Condensate traps ensure water drains correctly while preventing air from bypassing the drain system. 13. Which refrigerant is considered an HFO (hydrofluoroolefin)? a) R-134a b) R-1234yf c) R-22 d) R-410A b) R-1234yf HFOs like R-1234yf are low-GWP refrigerants developed to replace HFCs in automotive and residential applications. 14. What is the main cause of compressor short cycling? a) Refrigerant overcharge b) Low suction pressure c) Thermostat malfunction or oversized equipment d) Dirty air filters c) Thermostat malfunction or oversized equipment Short cycling occurs when equipment turns on and off too frequently, often due to an oversized unit or thermostat issues. 15. In duct design, what is the purpose of a plenum? a) To support the duct physically b) To reduce noise c) To distribute air evenly d) To filter contaminants c) To distribute air evenly A plenum acts as a central chamber to evenly distribute conditioned air to multiple ducts.