10 free PE Civil practice questions in the real exam format, covering the official content areas, with an explanation for every answer.
PE Civil Practice Test 15Tutor mode
Question 1 of 10
Water Resources and Environmental
A state is setting a total phosphorus TMDL for a stream reach using the elements shown. The municipal wastewater treatment plant receives all of the remaining allocation. Use 1 cfs = 0.646 MGD. The effluent TP concentration limit for the plant at its design flow is most nearly:
Total phosphorus (TP) TMDL elements for the impaired reach
Element
Value
Design low flow at the downstream end of the reach
40 cfs
Instream TP target
0.10 mg/L
Margin of safety (explicit)
10% of the loading capacity
Load allocation, nonpoint sources
9.0 lb/day
Wasteload allocation, municipal separate storm sewer system (MS4)
3.5 lb/day
Wasteload allocation, municipal WWTP (design flow 1.5 MGD)