Question

one of the weaknesses of copper drain and waste and vent pipe is it corrodes easily its noisy its combustible its susceptible to acid its hard to work with question 18 trap problems include all of the following except slip joints missing wrong type leaking double trapping

Explanation:

Copper is relatively resistant to corrosion, not easily combustible, and not overly hard - to - work with. However, copper drain, waste, and vent pipes can be noisy as water flows through them. For trap problems, slip joints are a common and proper part of traps and not a problem in themselves, while missing traps, using the wrong type, leaking, and double - trapping are issues.

Answer:

First question: it's noisy
Second question: slip joints