Download FDOT Asphalt Paving Level 2 Exam Questions & Answers (Grade A+) and more Exams Engineering in PDF only on Docsity!
Questions & Answers (Grade A+)
What makes up a quality asphalt mixture? - correct answer ✅A quality asphalt mixture is determined by the constructability, if it conforms to Specifications, and if it satisfies functional requirements. CQC - correct answer ✅contractor quality control Superpave - correct answer ✅Asphalt mix design system since 1998 QCP - correct answer ✅Quality control plan QCM - correct answer ✅Quality control Manual QC - correct answer ✅Quality Control (Contracting Testing and Inspection)
Questions & Answers (Grade A+)
VT -
correct answer ✅Verification Testing (FDOT or CEI Verification) CEI - correct answer ✅Construction Engineering and Inspection RT - correct answer ✅Resolution Testing (FDOT) IV - correct answer ✅Independent Verification Testing IA - correct answer ✅Independent Assurance Testing The decision-making authority on a job needs to be given to who? - correct answer ✅Needs to be given to the level closet to the work as specified in the specifications. It ensure a quick handle on situations and issues.
Questions & Answers (Grade A+)
The governing order of project documents from high to low (6) - correct answer ✅Supplemental Specifications The governing order of project documents from high to low (7) - correct answer ✅Standard Specifications What are the key components in a pre-paving conferences? - correct answer ✅Key Personnel (Paving superintendent) Contractor Input Agency Input QC Plan Review Discuss more specific key topics or issues Meeting Minutes Action items (what to do in situations, who to call) What are the key components in a pre-construction conferences? - correct answer ✅Agency Input (FDOT)
Questions & Answers (Grade A+)
Contractor Input (Including the Prime) Project Personnel (Upper - Middle management) Testing Safety Utilities Cities or Municipalities (HOA, school boards) Suppliers What causes the compactive effort increase? - correct answer ✅Crushed aggregate content Nominal maximum size Hardness of the aggrergate Angularity of aggregate Less natural sand High dust content mixes Gradation of the mix greatly affects compaction Superpave mixes What kind of Performance Graded binders are there? - correct answer ✅PG 67-22 (old AC-30)
Questions & Answers (Grade A+)
Asphalt cement does what while cold? - correct answer ✅It becomes a glue and holds the rocks together PG 76-22 (PMA) is especially good at what? - correct answer ✅Reducing rutting. What is an asphalt treated permeable base? - correct answer ✅Concrete placed over asphalt Friction course mixes uses a what kind of aggregate? - correct answer ✅A polish resistant aggregate What is a polish resistant aggregate? - correct answer ✅Oolitic limestone (Miami-Dade County) Granite (Georgia, Alabama, Nova Scotia) Other Approved Sources Asphalt generally has a minimum thickness to be laid at but what determines how thick? -
Questions & Answers (Grade A+)
correct answer ✅The plans developed by the designer does What is the difference between Superpave mixes and Friction Course mixes? - correct answer ✅Polish resistant aggregate and special PMA or ARB binders are used in friction course mixes. A shoulder less than 5 ft with FC-5 can not have what?
correct answer ✅A joint. Pave the outside of the mainline and the shoulder at the same time. B-12.5 mix can be substituted for what? - correct answer ✅SP-12.5 TL-B or C can be used in lieu of the base mix B-12.5 mix can also be substituted for what? - correct answer ✅The contractor may substitute a SP 12.5 TL-D or E mix in lieu of base mix as long as it does not exceed 500 tons for a project and at no extra cost.
Questions & Answers (Grade A+)
What is the tolerance for the asphalt spread rate target? - correct answer ✅+- 5% How do you calculate the tolerance for the asphalt spread rate target? - correct answer ✅Ex: Target Spread Rate = 165 lb/syds 165 x 0.05 (%5) = 8 lb/syd Then you use the 8 as a + or - from 165 so the range is from 157 to 173 lbs/syd Formula for determining the asphalt spread rate for an FC-5 mix? - correct answer ✅target spread rate = thickness x gsb (from mix design) x 40. (round to the nearest whole number) A prime coat being used on lime rock, sand-clay, shell, and shell stabilized based have an application rate of what? - correct answer ✅Limerock: greater than or equal to 0.10 gal/syd
Questions & Answers (Grade A+)
Sand-Clay, Shell, Shell Base: greater than or equal to 0.15 gal/syd You do not test overbuild for density unless it is? - correct answer ✅Greater than one inch Where do you find approved tack products? - correct answer ✅On the FDOT Approved products list (APL) During night what is the tack you usually use? - correct answer ✅PG 52-28 or an approved emulsion What tack an you use during the day? - correct answer ✅Any kind of tack When determining the specification rate for 52- tack you do what? - correct answer ✅Multiply the rate by 0. What is the tack application rate tolerance? - correct answer ✅+/- 0.01 gal/syd
Questions & Answers (Grade A+)
Step 5 for figuring the tack spread rate - correct answer ✅gallons used at 60F / syds = tack spread rate What is the application rate for ARMI layers? - correct answer ✅0.6 - 0.8 gal/syd Use the AC(ARB) temperature correction factor What is the spread rate for the chip spreader? - correct answer ✅0.26 to 0.33 ft/syd with the actual spread rate determined by the engingeer What is the minimum thickness for asphalt being placed over an ARMI layer? - correct answer ✅1 1/2 inches unless plans call for a thicker mat Where should you stick a thermometer in a truck? - correct answer ✅The hole should be 1/4 of an inch In the middle third of the length of the body
Questions & Answers (Grade A+)
and 6 to 10 inches above the bottom of the bed How much asphalt should be in front of the screed being mixed by the augers? - correct answer ✅The proper head of material is at the center of the auger shaft While the paver is moving the augers should be moving - correct answer ✅80 - 90 % of the time Screed heaters can not be used to do what - correct answer ✅raise the heat of the mix When matching paved joints you must have a - correct answer ✅Joint matcher ( sonic or shoe paddles) The ski pole for the join matcher has to be how long - correct answer ✅25ft
Questions & Answers (Grade A+)
The formula for Pounds per linear inch is - correct answer ✅PLI = roller weight LB / sum of drum widths IN To increase the compactive effort you can - correct answer ✅Increase the air pressure (traffic roller) Increase the weight Slow down the paver (increase dwell time) Amplitude is what? - correct answer ✅How high the roller jumps Frequency is what? - correct answer ✅The frequency in the vibration cycles that rotate per minute Impact spacing is what? - correct answer ✅Is the spacing of the impacts of the applied force is a function of the frequency of the vibration and the travel speed. There should be 10 - 12 impacts per foot
Questions & Answers (Grade A+)
Vibratory rollers can finish the pass by - correct answer ✅using a static pass (no vibratory) How cool does the asphalt have to be for traffic to drive on it? - correct answer ✅160F For BASE what is the lowest temperature limitations? - correct answer ✅40F For BASE you can exceed in laying more than how thick - correct answer ✅more than 3 inches The formula for figuring a BASE asphalt spread rate is
correct answer ✅spread rate = thickness x gmm x
Has the same tolerance or +/-%5 as structural
Questions & Answers (Grade A+)
Density makes up how much of pay? - correct answer ✅35% Airvoids makes up how much of pay? - correct answer ✅25% AC makes up how much of pay? - correct answer ✅25% #200 Sieve makes up how much of pay? - correct answer ✅10% #8 sieve makes up how much of pay? - correct answer ✅5% What is the standard lot size for FC-5? - correct answer ✅Always 2000 tons What is the formula to determine the core location? - correct answer ✅2000 x spread rate x 9 / width x tonnage of the core = feet from starting station
