PROBLEMS: PM WRE Practice Problems (205 Pages!)

LIST OF PROBLEMS:

- Pump curve efficiency at operating point

- Length of submerged spillway

- NRCS hydrograph + most efficient rectangular channel

- Collection system air test

- Filter bed minimum fluidization velocity

- Orifice jet clearing exterior wall

- Wet well pump cycle

- Confined aquifer -- potentiometric surface between observation wells

- Hardness and softening with non-pure chemicals

- Anaerobic lagoon HRT

- Detention tank design -- finite difference technique

- Critical oxygen sag point (time and distance)

- Runoff -- multi-parcel rational method

- Parshall flume depth

- Curb inlet length (with and without depression)

- Inclined settler SLR

- Creek flow reduction + unconfined aquifer transmissivity

- Trapezoidal channel critical and normal depths

- Pipe network pressure at a node

- Cascade design to increase D.O.

- Nitrification alkalinity requirements

- UH peak runoff from a multi-storm DRH

- Pump discharge into two tanks

- Confined aquifer -- head between two channels

- Sub/supercritical flow + curve superelevation

- Chlorine disinfection post-filtration

- Elevation of v-notch weir

- Phosphorus mass balance in lake with first-order decay

- Raw sludge production

- Pump characteristic and system formulas

- Sluice gate hydraulic jump and energy dissapation

- Hardness and softening -- annual treatment cost with pure chemicals

- Force on a curve with an angle chute

- Culvert analysis -- roadway elevation to eliminate flooding

- Infiltration basin surface area and depth

- UV disinfection reactor volume

- Pipe network -- water tower and pipe flowrate

- Unconfined aquifer -- discharge well near impermeable boundary (multiple wells)

- Multi-parcel runoff analysis with partially-full outlet pipe

- Area of constructed wetland for nitrogen removal

- Free fall jet

- Detention storage (AASHTO method)

- Stormwater inlet spacing

- Phosphorus removal with chemical precipitation

- Membrane filtration water recovery rate

- Branched reservoirs direction of flow

- Wet well active capacity

- Methane gas produced by anaerobic digestion

- Chlorine disinfection with two reactors in series

- Adjusting TMDL allocations

- Culvert overtopping flowrate

- Multi-storm DRH from UH -- size peak discharge pipe flowing 70% full

- Max height before siphon effect fails

- Water well sodium hypochlorite sterilization

- Unconfined aquifer -- discharge well near waterbody boundary (multiple wells)

- Cost to operate pump (w/ curves, power, and efficiency)

- Critical hump height in rectangular channel

- Nitrogen removal efficiency of natural wetland

- Phi- and W-indices

- Time of underground flow between two lakes

- Pump placement to avoid cavitation

- Length of combined sewer overflow weir

- Effects of channel constriction and depression on water surface elevation

- Disconnected impervious surface runoff

- Critical oxygen deficit

- Pipe network -- Hardy Cross

- Hardness and softening -- split-system design

- Spillway discharge with coefficient correction

- Unconfined aquifer -- groundwater flow characteristics between two channels

- Flowrate through culvert

- Branched reservoir system

- Infiltration and inflow

- Force on spillway curve

- Multi-outlet pond riser

- UV disinfection -- banks of lamps