Millard Manufacturing must replace one of its pumps. The net present cost of Alternative A is $8,956, Alternative B is $5,531, and Alternative C is $4,078. Alternative A is expected to last for 12 years; Alternative B has a life expectancy of 7 years; and Alternative C is expected to last for 5 years. If Millard's MARR is 5%, which alternative (if any) should be chosen using EUAC (Equivalent Uniform Annual Cost)?

Question 1 5 points Save An The city of Waterville has experienced the growth in population as shown below. Year > 1980 1990 2000 2010 Population 7300 9500 11900 14000 The per capita average daily water use (L/d) in 1990 was 300 L/d and is NOT expected to increase in the future. It is expected that the current WTP would reach its capacity in the Year 2020. For a 30 Year design period (Design Year = 2050), calculate the following A) Population assuming arithmetic increase. B) Population assuming geometric increase

Question #5. The fluoride feeder at the Lemieux Island WTP breaks down. As shown below, the well mixed tank flows into a 5 km long distribution pipe. The volume of the tank is 2.5 m³ and the treatment system serves 190 000 people who each use 200 L/d. The rest of the necessary data is provided in the figure. If the fluoride concentration in the tank is 1.0 mg/L when the feed stops, how long until the concentration of fluoride is reduced to 0.01 mg/L at the end of the distribution pipe? Assume that fluoride acts as a conservative substance. Fluoride C = 1.0 mg/L 5 km u = 0.17 m/s

The 5-day, 20°C BOD of a wastewater (Ke = 0.23/day, 0 = 1.047) is 185 mg/L. What is the corresponding 10-day demand and ultimate BOD (in mg/L)? If the bottle had been incubated at 33°C, what would the 5-day BOD value have been?