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 and not easily corroded, it's not combustible, and while it can react with some acids it's not extremely susceptible under normal drain - waste - vent conditions. One of the weaknesses of copper drain - waste - vent pipes is that they can be noisy as water flows through them. For trap problems, slip joints are a normal component and not a problem in the context of what a trap problem typically is. Missing traps, wrong - type traps, leaking traps, and double - trapping are all issues related to traps.

Answer:

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