Certified Pool Operator Practice Test 2025 - Free Pool Operator Practice Questions and Study Guide

A heat exchanger uses a compressor to radiate the high temperature of the water and cool it down for use in PVC piping. A compressor works by pressurizing the refrigerant gas, which causes it to become hot and allowing it to dissipate heat through the heat exchanger. Option B, a heat exchanger, is the correct answer because it is the specific component in the HVAC system that uses a compressor to cool down the water for use in PVC piping. Options C and D, heat sink and thermal buffer, may also play a role in the cooling process but are not the main component responsible for cooling the water. It is important to understand the functionality and purpose of each component in order to accurately answer this question.