Earthwork Level 2 Study Guide, Earthworks Level II Test Questions and Answers

Earthwork Level 2 Study Guide, Earthworks Level II Test Questions and Answers "What kind of density is the weight of soils, solids, and water occupying a unit volume? - Correct Answer Wet Density" "What kind of density is the weight of just soils and solids occupying a unit volume? - Correct Answer Dry Density" "Which Proctor Test is typically used for base, subgrade, and MSE wall backfill materials? - Correct Answer Modified" "Which Proctor Test is typically used for embankment and structure backfill materials? - Correct Answer Standard" "For the Modified Proctor, what is the required Maximum Density? - Correct Answer 98%" "For the Standard Proctor, what is the required Maximum Density? - Correct Answer 100%" "What is the ratio of the bearing capacity of the material being tested to the bearing capacity of reference limerock? - Correct Answer Limerock Bearing Ratio Test (LBR)" "The standard penetration resistance for a typical crushed limerock in Florida has been standardized to what psi? - Correct Answer 800 psi" "What is the method number for the Standard Proctor? - Correct Answer AASHTO T-99" "What is the method number for the Modified Proctor? - Correct Answer FM 1 T-180" "Is the LBR value affected by moisture at the time of compaction? - Correct Answer Yes" What is the difference between compaction and density? - Correct Answer Compaction is the process used to achieve density, the product." "List the governing order of documents. - Correct Answer 1) Special Provisions 2) Technical Special Provisions 3) Plans (including revisions) 4) Design Standards 5) Developmental Specifications 6) Supplemental Specifications 7) Standard Specifications" "What material can be used anywhere in the embankment? - Correct Answer Select (A-3, A-4)" "What is included in the coding of a Density Log Book? - Correct Answer 1) Code the job 2) One book per Contract number 3) Enter all pertinent information 4) Number pages 5) Check the elevations 6) Split the Records System for convenience, if needed 7) Performed before construction starts" "The Earthwork Record Keeping System serves as a basis for what? - Correct Answer Accepting completed roadway earthwork" "What is the maximum particle size permitted below 24 inches in an embankment? - Correct Answer Not to exceed 12 inches or compacted thickness of the layer, whichever is less" "What construction tolerance must be met for the removal of plastic soils below the finished earthwork grade? - Correct Answer Plus or minus 6 inches" "Where constructing embankments adjacent to bridge end bents or abutments, rocks no larger than 3.5 inches cannot be placed within how many feet of the location of any end-bent piling? - Correct Answer 3 ft" "For what types of construction is a LOT defined as a single lift of finished embankment not to exceed 500 ft? - Correct Answer Mainline pavement lanes, turn lanes, ramps, parking lots, concrete box culverts, and retaining wall systems" "Where must borrow material be from? - Correct Answer FDOT approved source" "Construct soil in 6-12 inch compacted lifts and RAP in alternate layers with 6 inch maximum compacted lifts - Correct Answer 12 inches" "The percentage of fines passing the No. 200 US Standard sieve in the A-2-4 material should not exceed? - Correct Answer 15%" "Select material may be used where in the flexible pavement embankment construction? - Correct Answer Anywhere" "What is it called when como active effort does not penetrate the full thickness of the lift being compacted? - Correct Answer Bridging" "What is it called when moisture is drawn up by capillary action to the surface of the material being compacted? - Correct Answer Bleeding" "Plastic material may be used where in embankment construction? - Correct Answer Inside and outside of 1:2 slope, above water table, or 4-5 ft beneath base" "When should the coding of the Earthwork Record Keeping System be performed? - Correct Answer Prior to construction" "There are how many Earthwork Record Systems per Contract? - Correct Answer One (two parts: QC and Verification)" "Embankment plots in the density log book are to be what length? - Correct Answer Typically 500 feet" "Narrow widening strips are defined as how many feet? - Correct Answer 5 ft or less" "To what depth below the base is plastic material to be removed? - Correct Answer 24 inches (2 ft)" "What sets the 1:2 slope in rural construction? - Correct Answer Control line set by normal shoulder point whether or not shoulder gutter is used" "Which Design Standard drawing number sets forth removal of organic material requirements? - Correct Answer Design Standard 500" "What are the organic content limits for determining organic materials? - Correct Answer An average content of 5% or greater or an individual content of 7% or greater" "How far below the ground surface for excavation or embankments should roots and other debris be removed? - Correct Answer 12 inches" "What is the depth for plowing after root removal? - Correct Answer 6 inches" "What is the maximum particle size permitted in the top 12 inches of an embankment? - Correct Answer 3.5 inches" "No clearing and grubbing within how many feet of a right-of-way? - Correct Answer 3 feet" "Subsoil excavation consists of the excavation and disposal of muck, clay, rock, or any other material that is unsuitable in what position? - Correct Answer Its original position" "What do we compare in the Initial Equipment Comparison? - Correct Answer Calculated dry density" "What is a layer of 6 inches compacted thickness for full width? - Correct Answer Lift" "What is a single lift of compacted material not exceeding 500 ft? - Correct Answer Lot" "For construction of shoulder-only areas, bike/shared use paths, and sidewalks areas, what is the defined size of a lot? - Correct Answer 2000 ft" "The project plans are superseded by which contract documents? - Correct Answer Special Provisions and Technical Special Provisions" "For gauges of the same manufacturer, the comparison criteria is that the dry density results compare within what? Different manufacturer? - Correct Answer 2 pcf; 3 pcf" "Initial equipment comparison is not to be performed more than how many times per project, unless instructed by the engineer? - Correct Answer No more than once" "What is the verification comparison criteria for Maximum Density (Proctor)? - Correct Answer 4.5 pcf" "What areas should you not use RAP material in? - Correct Answer 1) Construction areas that are below the seasonal high groundwater table elevation 2) MSE Wall backfill 3) underneath MSE Walls 4) Top 6 inches of embankment" "When placing RAP materials, what maximum layer thickness should be obtained? - Correct Answer 4 inches" "Do not mix RAP in what? - Correct Answer The uppermost 12 inches" "How thick should the loose soil layer mix with the 4 inch max layer of RAP? - Correct Answer 8-10 inches" "How should soil and RAP layers be constructed? - Correct Answer Construct soil" "To prevent failure during compaction of the overlying RAP layer, what should the minimum LBR value of the soil be? - Correct Answer 40" "Where unsuitable material is removed and the remaining surface is of the A-2-7 Soil Groups, compact the surface of the excavated area by rolling with a sheepfoot roller exerting a compression of at least what psi on the tamper foot, for the full width of the roadbed? - Correct Answer 250 psi" "If the Plans do not provide for stabilizing, compact the subgrade and it becomes what? - Correct Answer Embankment 100% standard" "What is the minimum length of embankment to be constructed? - Correct Answer 300 ft" "For a thick lift test section how many QC density tests are taken? - Correct Answer 5" "As a general rule of thumb, when fill is deposited in water, density testing generally begins how many inches above the water level at the time the fill is placed? - Correct Answer 12 inches" "What will the Engineer do when a QC computed dry density results in a value greater than 105% of the applicable Proctor maximum dry density? - Correct Answer The Engineer will perform an Independent Verification density test within 5 ft" "What should you do when no Resolution testing is required for 12 consecutive verified LOTs or if it is required, the QC data was upheld? - Correct Answer Reduce the QC density testing to one test every two LOTs" "Remove rock, boulders, or other hard lumpy or unyielding material to what depth below the bottom of the pipes and box culverts elevations? - Correct Answer 12 inches" "In which zone should the soil be compacted to approximately match the density of the soil in which the trench was cut? - Correct Answer Lowest Zone" "For the Bedding Zone, if the trench was not undercut below the bottom of the pipe, what should you do? - Correct Answer Loosen the soil in the bottom of the trench immediately below the approximate middle third of the outside diameter of the pipe" "For the Bedding Zone, if the trench was undercut below the bottom of the pipe, what should you do? - Correct Answer Place the bedding material and leave it in a loose condition below the middle third of the outside diameter of the pipe" "Before placing material for which zone do we excavate, lay pipe, and hand ramp material below the pipe haunch that cannot be reached by mechanical tampers? - Correct Answer Cover Zone" "Which of the zones requires that material be placed in layers not to exceed 12 inches in compacted thickness? - Correct Answer Top Zone" "A minimum of what QC density in any LOT should be obtained? - Correct Answer 100% of the Standard Proctor maximum density" "The pipe backfill in the cover zone should be compacted to a density of at least 95% of the Standard Proctor maximum density when the cover height below the bottom of base under asphalt, below concrete pavement, or below unpaved ground does what? - Correct Answer Exceeds 15 inches" "For pipe lines placed above the natural ground line, the embankment should be constructed at what minimum width prior to excavating the trench? - Correct Answer 4 times the pipe diameter" "When placing and compacting backfill around structures in wet conditions, do not permit the use of mechanical tampers and hand tampers are required, what material is to be used? - Correct Answer Only A-3" "Do not exceed LOT-average depth thickness by more than how many inches? - Correct Answer 1 inch measured to the nearest 0.25 inches" "Is under tolerance of mixing depth allowed? - Correct Answer No" "What minimum density of the Modified Proctor maximum density as determined by FM 1 T-180 should be obtained within the entire limits of the width and depth of the areas to be stabilized? - Correct Answer 98%" "Material used for stabilizing can have maximum LL of what and a PI of what? - Correct Answer 40;10" "What is the minimum density required after compaction on stabilized subgrade? - Correct Answer 98% of FM 1 T-180" "What is the value required for an Unsoaked LBR 40? What is its tolerance? - Correct Answer 43; 0.0" "If QC and VT do not compare within 4.5 pcf for Maximum Density, what should be the next step? - Correct Answer SMO tests the RT sample" "Which zone is directly beneath the pipe? - Correct Answer Bedding Zone" "What is the density requirement within the Cover Zone when top of pipe is 15 inches below the bottom of base? - Correct Answer 100% of AASHTO T-99" "Which zone is from the bottom of the pipe to 12 inches above the pipe? - Correct Answer Cover Zone" "Where is thick lift compaction not allowed? - Correct Answer Soil Envelope" "What is the density requirement within the Cover Zone when top of pipe is greater than 15 inches below the bottom of base? - Correct Answer 95% of AASHTO T-99" "What is the density required in the Lowest Zone? - Correct Answer Match the density of soil in the trench" "What is the verification density testing frequency for pipe and structures? - Correct Answer 1 per 4 LOTs" "How are testing locations determined and who are they approved by? - Correct Answer Determined by random number generator and approved by the Engineer or Department" "How should geosynthetic materials be delivered to the job site? - Correct Answer In unopened shipping packages" "Why would the Engineer reject the material at time of installation? - Correct Answer If it has defects, tears, punctures, flaws, deterioration, or other damage" "To prepare for soil slope, what needs to be removed? - Correct Answer All existing vegetation and all unsuitable foundation materials" "To prepare a soil slope, proof roll the graded area with a vibratory roller weighing a minimum of how many tons or a sheepfoot roller exerting a compression of how many pounds psi on the tamper foot at least five passes in the presence of an Engineer? - Correct Answer 8 tons; at least 250 lb psi" "When placing backfill, a backfill material with a moisture content of what should be on the dry side of optimum? - Correct Answer 2%" "Can wet backfill with a moisture content greater than optimum in the fill be placed? - Correct Answer No" "How should the backfill be compacted? - Correct Answer Using either smooth wheel or rubber tire rollers" "Do not exceed individual plan depth thickness by more than how many inches? - Correct Answer 2 inches"