National Center for Construction Education & Research (NCCER) Plumbing Level 1 Practice Exam

CPVC (Chlorinated Polyvinyl Chloride) pipe exhibits more resistance to corrosion than copper pipe, making it an ideal choice for many plumbing applications, especially in environments where corrosive substances may be present. Unlike copper, which can corrode when exposed to certain chemicals or environmental conditions, CPVC is not susceptible to such reactions, significantly extending its lifespan and reducing maintenance needs.

In high-temperature applications, while CPVC does have a limit to the temperatures it can handle, it generally performs well under temperature fluctuations, although this would not specifically highlight its resistance compared to copper.

Water hammer is a phenomenon caused by the sudden change in water flow, leading to pressure surges that can create noise and potential damage in pipes. CPVC pipes tend to absorb these surges better due to their flexibility, lessening the impact of water hammer compared to more rigid materials like copper.

While both types of pipes can experience pressure loss, this is not unique to CPVC and does not highlight its advantages over copper in the same way corrosion does.

Thus, the primary strength of CPVC against copper lies in its superior corrosion resistance, making it a preferred choice in many installations where environmental factors may lead to deterioration.