1.An operator at a wastewater treatment plant decided to increase the SRT from 5 days to 10 days. How will this change affect: a. the oxygen requirement b. MLVSS in the aeration tank c. the effluent BOD or COD d. and the sludge generation
2.If a hand-held GPS unit locates a latitudinal position with an uncertainty of + - 0.05-seconds, what is the distance uncertainty at the surface of the ellipsoid (answer in + - feet
3.Determine the critical load of a round wooden dowel that is 49 in. long and has a diameter
(a) 0.325i in
(b) 0.5 in. use E= 1.6*10^3 psi.