1.A small town produces 0.15 MGD of wastewater. how many acres in size would an aerated lagoon need to be to treat this wastewater assuming a depth of 8 ft and a detention time of 6 days ? (7.48gal/ft^3 ; 43,560 ft^2/acre)
2.What is a trajectory diagram? What is the use of a trajectory diagram in traffic flow analysis? Describe.
3.It was observed that the quantity of the water flowing through the sand layer into the collection ditch is 250 m^3/day. What is the hydraulic conductivity of the sand (k)
4.A Carnot heat engine is supplied with a high temperature heat source at a rate of 200 kW. If the power output of the heat engine is 120 kW, determine the required source temperature if the heat sink temperature is 20 °C.