The most common method used to protect underground pipes from rusting is _____.
A) covering them with paint
B) attaching a more active metal to them
C) treating them with sodium hydroxide
D) coating them with another metal whose oxide is less stable
E) treating them with hydrochloric acid

Question

Quizplus · Accepted Answer

Attaching a more active metal to underground pipes is a method known as cathodic protection. This method protects the pipes from rusting by making the more active metal corrode instead of the pipe, thus prolonging the life of the pipe.

The Most Common Method Used to Protect Underground Pipes from Rusting