FL storm water exam questions fully solved & updated 2024

Erosion Is the process by which land surface is worn away by the action of wind water and gravity Sedimentation Is the settling out of soul particles transported by wind and water water erosion can be classified as either _________ erosion or ___________ erosion Overland or stream/channel What are the four processes of overland erosion Splash / rain drop erosion Sheet erosion Rill erosion Fully erosion Four Principle factors influencing soil erosion Soil characteristic Vegetative cover Topography Climate Low Erodibility 0.23> Moderate Erodibility 0.23 to 0.36 High Erodibility 0.36< Clay and muck Soil particles smaller than 0.002 mm are classified as _________ and ________ they are the soil types that cause the most erosion High; low Souls in the Type A hydrologic group have _____ infiltration rates and ________ runoff potential even when throughly wetted Low; high Souls job the Type D hydrologic group have very _______ infiltration rates and ______ runoff potential when thoroughly wetted Rainfall index The only factor in the Universal Soil loss equation which is beyond the developers control Length, gradient and cover factor Slope _______,_________ and ________ are the factors most easily manipulated by the developer Soil loss The RUSLE is used on our construction sites to predict _________ FDOT, FDEP, Water Management District, Mayors office or NRCS Who can you contact fair a soil survey information? Climate, topography, organisms, parent material and time What are the five soil forming factors? False T/F. Waste disposal is a problem for the individual workers and some subcontractors but it's no big deal True T/F. Truck washing should be done in a designated area, not near the perimeter controls False T/F. Storage of paints, solvents, cements, pesticides, acids or other potentially polluting chemicals is no big deal because they are only stores temporarily and get used up quickly False T/F. The public needs to understand that dust is just a normal party of construction 50 feet long; 6 inches thick A temporary gravel construction entrance must extend the full width of the entrance, and much be _______ long and _____ thick 6 months Average life span of silt fence 4 inches deep 4 inches wide For proper installation of silt fence, a trench ______ deep and ________ wide should be excavated 1 acre Maximum drainage area for an inlet protection device 2" x 4" by 3 feet long, and a 2" x 4" frame Stakes shall be ___x___ long and _____x____ frame shall be constructed around the top of the stakes for proper stability Detain The purpose of a sediment trap is to ______ turbid water 1.5 feet When constructing a pipe outlet sediment trap, the top of the rider pipe must be at least ______ bow the top of the embankment 1-2 feet When construction a storm inlet sediment trap, the trap shall be between _________ deep measure from the low point of the outlet Detain The purpose of a sediment basin is to _______ turbid runoff disturbed area 10 acres A sediment basin is required for a drainage area more than ________ True T/F. In a sediment basin, baffles are used to increase flow length 5 acres The maximum allowable drainage area for a temporary slope drain True T/F. A diversion or earthen dike shall be used to direct storm water into the temporary slope drain pipe diameter; 6" The height of the dike at the inlet shall be equal to the ________ plus _____ inches Half Sediment should be removed from check dams when it reaches half of the original height (or prior to that) Contain sediment A floating turbidity curtain is designed to ______ _______ laden water and allow enough time for sediment to settle out Parallel to / along In flowing water turbidity curtains should be placed ________ ________ (in what orientation) Buoys Anchor lines shall be attached to the _____, not to the bottom of the curtain or float False T/F. Sediment shall be allowed to settle a minimum of 72 hours prior to removal of the turbidity curtain 1. Aid in establishment of vegetative cover 2. Reduce runoff velocity and increase infiltration 3. Reduce erosion and provide sediment trapping Three purposes of soil roughening The purpose of topsoiling is to provide a suitable growth medium for final site stabilization with vegetation What is the purpose of topsoiling Dissing or scarifying The subgrade should be prepared by _______ and _______ to insure bonding of the top and subsoil