PE Exam - Civil: Breadth

PE Exam - Civil: Breadth 0.3 m/s, wastewater treatment - fluid velocity in the grit removal 0.6 m/s, wastewater treatment - fluid velocity in the sewer 30% BOD - Primary ww treatment removes how much of BOD 60% solids - Primary ww treatment removes how much of solids AADT - ___=[total yearly volume] divided by 365 Abutments - structural components that connect the bridge to the ground at the ends of the bridge adsorption - involves removal of specific compounds from wastewater on solid surfaces using the forces of attraction between bodies aerated grit chamber - a type pf chamber where in compressed air is injected to keep lighter organic material in suspension while the heavier grit falls to the bottom Allowable strength design = demand = design load = - = required capacity of material based on the service loads allowable stress - In allowable strength design method, actual calculated stress cannot exceed.... allowable stress = - material strength / safety factor allowable strength design method Arch Bridge - type of bridge that relies on the strength and rigidity of the arch. the strength of an arch is that the structural members are always in compression and that it can distribute the load throughout the arch to the abutments. Average travel Speed [Mean speed] - ___ = sum[Frequency times speed] divided by [frequency] Backflow, wastewater - reverse flow of contaminants through a cross-connection into the potable water supply; this causes the inffectiveness of screening, as a result H2s will be formed in the septic tank band screen - perforated belt passes oven an upper and lower roller bar racks - 3-4 in apart, filter out larger debris bar screens - in water reclamation, these remove large objects from the water; 0.5 to 1.5 cm apart to filter out smaller debris barminutor - vertical bar screen with a cutting head that travels up and down the rack bars, shredding the interrupted material Beam Bridge - simplest type of bridge used to span the shortest distance Bending - force that causes a structure to sag when placed in the middle of it Biodegradable organics - composed principally of proteins, carbohydrates and fats, biodegradble organics are measured in BOD or COD brace - structural member used to provide structural stability Calc time between successive veh (sec/veh) - ___ = 3600/V (Transportation) Calc. spacing (S) in ft - ___ = 5280/density (Transportation) Calculates number of vehicles per hour per lane (vphpl) - v=S*D [Space mean speed time Density] Calculates number of vehicles per mile per lane - D=v/S (Transportation) Cantilevered bridge - type of beam bridge that can span greater distances than a simple beam bridge and often includes trusses in the framework capture rate - 6 ft3/million gal Carbonate Hardness, CH = - sum of equivalent weights of bicarbonate (HCO3-) and carbonate (CO3-) Cementitious materials - Include portland cement, blended hydraulic cements, expansive cement, other cementitious additives, including fly ash pozzolanszl, silica fume, and ground granulated blast furnace slag central core - reinforced concrete shaft at the center of the building channel design - the length and width of a (the distribution) channel channel type, horizontal flow grit chamber - oldest type of grit chamber chemical precipitation - is accomplished by producing a precipitate that will settle chlorine - purchaesd as liquid but is released to the