FDOT Earthwork Level 1 Sample Questions And Solutions

FDOT Earthwork Level 1 Sample Questions And Solutions Basics covered in Level 1 - ANSWER Nuclear Testing Speedy Moisture Report Forms Earthwork has to do with the roadway in what way? - ANSWER Earthwork is the excavation and placement of soils and materials supporting the proposed roadway. In Earthwork what is a lift? - ANSWER 6" of compacted depth at full width In Earthwork what is a Lot? - ANSWER A lot is 1 lift at 500 ft or within compacted area. Isolated compaction operations are separate lots. Sampling at the roadway is done for - ANSWER Done for base, sub grade, and embankment. Sampling is determined how - ANSWER generated with random numbers usually by a Verification Inspector What is important about sampling at the roadway - ANSWER Minimum of three representative sample combined. What is LIMS? - ANSWER Laboratory Info Management System The proctor theory is when compaction is achieved how - ANSWER by inputting energy to expel air and water in the soil voids Compaction causes - ANSWER An increase in unit weight, decrease in compressibility and permeability. The proctor is determined where and creates what - ANSWER In a laboratory and establishes a density standard to be used on the roadway Lab proctors are created how - ANSWER Material is gathered from the road and prepared with different amounts of water then placed in molds and hammered What is a modified proctor used in - ANSWER It is used in base, sub grade, MSE wall back fill materials Modified proctors are created how - ANSWER With a 10lb hammer(rammer) on a 18" drop with 56 blows per layers with 5 layers in total. What is a standard proctor used in - ANSWER It is used in embankment and structure back fill materials Standard proctors are created how - ANSWER With a 5.5lb hammer(rammer) on a 12" drop with 25 blows per layer with 3 layers in total Comparison between VT and QC density test tolerance - ANSWER 2 lbs/pcf What is the STRG - ANSWER Sampling, Testing, and Reporting Guide (state wide) A job guide schedule is - ANSWER project specific The material identification number for embankment in the laboratory is - ANSWER 004L The material identification number for embankment in the field is - ANSWER 004F The material identification number for base is - ANSWER 030 PP is short for - ANSWER project personel Sampling in the field it is important to - ANSWER sample each type of material and have enough for a representative sample When to secure samples - ANSWER After material is placed but before compaction effort is applied Sample transmittal card the source uses what code for the jobsite - ANSWER 08 For material description the minimum is always - ANSWER Color and texture On sample bags be sure to put - ANSWER Project # Sample # Location What is the document that itemizes the minimum requirements for sampling and testing? - ANSWER Sampling, testing, reporting guide Unit weight is - ANSWER the weight of a material occupying a volume Wet density - ANSWER is the weight of soil and water in a volume Dry density - ANSWER weight of soil solids in a volume Moisture content - ANSWER amount of water in the soil in the volume How does moisture react with soil - ANSWER acts as a lubricant permitting maximum densification Compaction expels air and water causing - ANSWER Increase in unit weight and Decrease in compressibility and permeability (ability of water to flow through) MSE wall stands for - ANSWER Mechanically stabilized earth wall FM 1 T-80 refers to which proctor - ANSWER Modified AASHTO T 99 refers to which proctor - ANSWER Standard Density is the measuring of - ANSWER the dry density of soil compared to max dry density determined by proctor % compaction When is the density be more than 100% of the maximum dry density on the proctor test? - ANSWER If compactive effort is more applied in field than lab Direct transmission is - ANSWER a rod with Cesium-137 lowered to depth. The photons pass through material to the gauge. Backscatter geometry is - ANSWER gamma photons reflected on to material and required to have at least one reach the gauge. The standard block and gauge must have matching - ANSWER serial numbers If daily standard counts are out of tolerance even after being re-run what do you do? - ANSWER Replace gauge Gauge calibration must be performed by - ANSWER qualified personnel How often must the gauge be calibrated per FDOT - ANSWER Annually (FDOT) or when needed Take standard counts daily to - ANSWER detect inconsistencies early Standard counts are taken - ANSWER every day its used and to measure equipment aging and drift In the gauge diary (for standard counts) when it is not used what do you put down? - ANSWER Idle During a standard count the gauge must be how far from large objects - ANSWER 10ft During a standard count the gauge must be how far from any nuclear source - ANSWER 30ft