ESCO Air Conditioning Practice Exam

An overcharge of refrigerant will most likely cause which of the following?

1. Decreased suction pressure

2. Increased head pressure

3. Increased airflow

4. Lower evaporator temperature

The correct answer is: Increased head pressure

An overcharge of refrigerant can cause an increased head pressure because there is a larger amount of refrigerant in the system, leading to higher levels of pressure. This can then put strain on the system and potentially cause damage. The other options are incorrect because an overcharge of refrigerant would not cause a decrease in suction pressure, as there is still enough refrigerant to maintain the pressure. It also would not lead to an increase in airflow, as the level of refrigerant does not affect the movement of air. Additionally, it would not cause a lower evaporator temperature, as the excess refrigerant would still be able to absorb heat and cool the air.