Registered Public Utility Engineer - Water Supply & Drainage - independent engineering foundations cheat sheet
Registered Public Utility Engineer - Water Supply & Drainage - independent engineering foundations · Keep the key ideas within reach.
Water Resources and Environmental engineering models and applications
Use the correct rational-method unit conversion and an appropriate stated rainfall-intensity duration.
Manning's equation uses hydraulic radius A/P, not flow depth
Partial-full circular pipe flow can exceed full-flow velocity
Removal efficiency compares influent and effluent concentrations
Time of concentration sets the rainfall intensity duration
Water supply, wastewater treatment and service boundaries
Physical removal and disinfection perform complementary functions.
Hydraulic and solids retention times are distinct.
Nitrification alone does not guarantee total nitrogen removal.
Mass-loading calculations require consistent flow and concentration units.
A hypothetical calculation is not a current water-quality or fire-service requirement.
Geotechnical engineering models and applications
Effective stress equals total stress minus pore pressure
Use buoyant unit weight below the water table
Drained versus undrained strength depends on loading rate and permeability
USCS classification depends on grain size and plasticity
Active, at-rest, and passive earth pressures are distinct conditions
Construction engineering models and applications
Total float preserves the stated project finish; free float preserves successor early starts.
Bank, loose, and compacted volumes use swell and shrinkage separately
Critical path can shift after logic or duration changes
Crane capacity must be checked at the actual operating radius
Unit-price contracts pay by measured quantity; lump-sum pays for the scope