Question 144Steam Plants - 1st Asst/Chief

A) 8 ounces of oxygen dissolved in 1,000,000 ounces of water is the correct answer. Dissolved oxygen (DO) concentration is typically measured in parts per million (ppm), which is equivalent to milligrams per liter (mg/L). A DO concentration of 8.0 ppm means that there are 8 milligrams of oxygen dissolved in 1 liter of water. The other options are incorrect because they do not accurately represent the relationship between the amount of dissolved oxygen and the volume of water. Option B incorrectly states the ratio of oxygen to water, while options C and D use incorrect units (pounds and tons) for the amount of oxygen and water.