Elevate your plumbing career with our Red Seal Plumbing Exam quiz. Crafted to test and enhance your knowledge, ensuring you're fully prepped for success. Dive in now!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.


The corrosive effects of ____ can cause pitting in a pipeline.

  1. chlorine

  2. carbon dioxide

  3. oxygen

  4. hydrogen sulfide

The correct answer is: oxygen

Oxygen can cause pitting in a pipeline through corrosion as it reacts with metals in the pipeline, leading to the formation of pits and potentially weakening the structure. While chlorine, carbon dioxide, and hydrogen sulfide can also have corrosive effects, they do not specifically cause pitting in pipelines like oxygen does. Additionally, chlorine and carbon dioxide are gases and are not typically found in pipelines, and hydrogen sulfide requires moisture or water to cause significant corrosion. Therefore, C is the most accurate answer.