1.An open traverse that runs from A through H has the following deflection angles: B = 6o25' R; C = 3o54' R; D = 11o47' R; E = 20o02' L; F = 7o18' L; G = 1o56' R. If the bearing of AB = N 20o40' E, compute the bearings of the remaining sides.
2.A 150-mL sample from a lake was used to determine TSS. A rinsed and dried filter weighed 0.3588 grams before the sample was filtered and then weighed 0.3630 grams after the sample was filtered and being at dried at 103C. What is the TSS for this sample?
3.A BOD5 test sample of river water has the following test data. DO on day 0 = 7.9 mg/L. DO on day 5 = 2.3 mg/L. What is the BOD5 of the river water?
4.A 250 cubic meter reaction tank contains a waste water having an ultimate BOD concentration of 755 mg/L. If the BOD reaction rate constant is -0.352/day, how much BOD is remaining after 12.0 days?