50) What is the function of the reversing valve in a heat pump system? A) To control the refrigerant flow direction B) To cool the refrigerant C) To circulate the air D) To compress the refrigerant 51) What is the purpose of the bypass damper in a zoning system? A) To control the airflow to different zones B) To cool the refrigerant C) To circulate the air D) To compress the refrigerant 52) What does the term "VRF" stand for? A) Variable Refrigerant Flow B) Variable Room Frequency C) Ventilation Rate Factor D) Viscous Refrigerant Flow 53) What is the primary advantage of a variable-speed air handler? A) Energy efficiency B) Cost-effectiveness C) Noise reduction D) Durability 54) Which refrigerant is known for its high efficiency and environmental friendliness? A) R-22 B) R-134a C) R-410A D) R-1234yf 55) What is the purpose of the purge valve in an air conditioning system? A) To release excess refrigerant B) To cool the refrigerant C) To circulate the air D) To compress the refrigerant 56) Which component in an air conditioning system is responsible for controlling humidity levels? A) Dehumidifier B) Humidifier C) Evaporator coil D) Condenser coil 57) What is the primary