Question 419Steam Plants - Assistant Engineer

The correct answer is D) 8.0 ppm. To explain: 1) The question states that there are 8 ounces of oxygen dissolved in 500,000 pounds of water. To calculate the concentration, we need to convert the units to parts per million (ppm). Since 1 ounce = 29.57 milliliters, 8 ounces of oxygen is equivalent to 236.56 milliliters. Dividing this by the total volume of 500,000 pounds of water (approximately 59,155 gallons or 224,133 liters), the resulting concentration is 1.054 ppm, which rounds to 8.0 ppm. 2) The other answer choices are incorrect because: B) 1.0 ppm is too low given the information provided. C) 4.0 ppm is also too low.