Question 387Steam Plants - Assistant Engineer
70% to passA dissolved oxygen concentration of 8.0 ppm represents _______________.
A8 ounces of oxygen dissolved in 1,000,000 ounces of water
B8 lbs of oxygen dissolved in 1,000,000 tons of water
C8 tons of oxygen dissolved in 1,000,000 pounds of water
D80 ounces of oxygen dissolved in 100,000 ounces of water
AI Explanation
The correct answer is A) 8 ounces of oxygen dissolved in 1,000,000 ounces of water. This is correct because a dissolved oxygen concentration of 8.0 parts per million (ppm) means that there are 8 units of dissolved oxygen per 1,000,000 units of water. Since the question states "ounces" as the unit, the correct interpretation is that there are 8 ounces of oxygen dissolved in 1,000,000 ounces of water. The other answer choices are incorrect because they do not accurately represent the meaning of a dissolved oxygen concentration of 8.0 ppm in terms of the given units. Options B, C, and D all use incorrect unit conversions or ratios that do not properly reflect the definition of parts per million.
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