FDOT Asphalt Plant Level 1 Exam Questions and Correct Answers

FDOT Asphalt Plant Level 1 Exam Questions and Correct Answers "A PMA asphalt binder stands for what? - Correct Answer Polymer Modified Asphalt" "An ARB asphalt binder stands for what? - Correct Answer Asphalt Rubber Binder" "Subgrade requires an LBR of what? - Correct Answer 40" "When do you sample tack? - Correct Answer During unloading when it reaches 1/3 of the load" "What do you do first before sampling tack or binder? - Correct Answer Discard the first gallon to clear the line" "What is the goal of sampling? - Correct Answer To be done so randomly to avoid bias and creat uniform representative samples" Proper weight of mix for gyratory compactor - Correct Answer Around g. Determined through the mix design process to achieve the height of 115 +/- 5mm" "Required amount of mix for Gmm (rice) samples? - Correct Answer g total or grams individually for two flasks" "Required amount of mix for ignition samples? - Correct Answer Depends on the mix. SP & FC 5, 9.5, 12.5 are 1500g. SP 19 is 2000g" "Asphalt burns off at what temp - Correct Answer 538°C (1000°F)" "The furnace must be capable of what temperature - Correct Answer 650°C (1200°F)" "Flasks should be calibrated at what temperature and how often? - Correct Answer 77 +/ 2°F of water and once a month or >0.4 grams of dry weight" "How many parts of wetting agent to water - Correct Answer 1ml wetting agent to 1000ml water" "The vacuum applied to flasks for GMM - Correct Answer 30 +/- 2mm" "Vacuum pressure for GMM must be reached within - Correct Answer 2 minutes" "The Orbital Shaker must oscillate at - Correct Answer 270 +/- 10 rpms" "The vacuum and oscillating test for GMM then continues for how long when it reaches target pressure - Correct Answer 15 +/- 2minutes" "Gyratory compaction angle is - Correct Answer an internal angle of 1.16 +/- .02 degrees" "Ram pressure for gyratory compaction is - Correct Answer 600 +/- 18 kpA perpendicular to the axis" "RPM the gyratory compactor operates at - Correct Answer 30 +/- .5 gyrations a minute" "Gyratory (GMB) and Rice (GMM) samples must be conditioned at what temp and for how long - Correct Answer compaction temp +/- 9 for 1 hour +/- 5minutes and mix should be within +/-20° of compaction temp" "The mold and base plate for the gyratory compactor should be in the oven for how long - Correct Answer 30 to 60 minutes" "Target specific height for pills - Correct Answer 115.0mm +/- 5mm" "How do you determine aggregate is dry? - Correct Answer Weigh the material every 15 minutes when it has lost less than 0.5 grams is it considered dry" "Bulk specific gravity (pill) water weight is determined after - Correct Answer 4 +/- 1 minute" "When the pill is removed from the water it should be blotted and weighed in what time and how - Correct Answer 5 seconds with a top and bot flip and then a roll roll The towel should be damp" "Formula for GMB (BSG) - Correct Answer Dry ÷ (SSD - Water Weight) Round to 3 decimal places" "Calculating air voids - Correct Answer (Gmm - Gmb ÷ Gmm) × 100" "For Asphalt Binders PG stands for what? - Correct Answer Performance Graded" "What do the numbers mean for an asphalt binder? ex: PG 67-22 - Correct Answer 67 is the average 7 day high temp in Celsius and 22 is the negative low temp in Celsius" "ATPB stands for and is used in what? - Correct Answer Asphalt Treatsd Permeable Base Used under concrete for drainage" "Friction Courses are required on what jobs based on AADT and Design Speed - Correct Answer AADT > 3000 Design Speed > 35 mph" "Lots are what size? - Correct Answer 2000 or 4000 tn" "FC5 can only use what lot size? - Correct Answer 2000 tn" "Sample sizes should weigh how much - Correct Answer 35 lbs" "Sample box sizes should be what dimensions? - Correct Answer 12"x8"x4"" "How do you sample an asphalt truck? - Correct Answer In 3 different areas at least 12" down" "What type of paper do you use for FC5? - Correct Answer Silicone coated non stick paper (no wax)" "Where should the hole be located for temping asphalt trucks? - Correct Answer On both sides 6-10" higher than the bottom of the bed in the middle third of the truck" "What is the master range for truck temperatures for both the plant and roadway? - Correct Answer +/- 30° This is also the temp you base rejections off of" "What is the criteria for temping asphalt trucks? - Correct Answer Any single trucks should be +/-25° Average of 5 trucks should be +/-15°" "Gyratory Specimens should be cooled to what temperature? - Correct Answer 77 +/-9°F" "What is the process for drying cores? - Correct Answer In the core dryer. Weighing each time until the weight lost is less than 0.5 grams" "How do you verify the gradation time? - Correct Answer You shake said sample at a certain time until the hand sieveing is <0.5% of the total sample weight for each individual sieve after one minute." "What is the hand sieveing process? - Correct Answer Individually take a sieve at a time and with a cover plate and catch pan hold at an angle and hit with the heel of hand in an upward motion. Rotate the sieve 1/6 of a revolution every 25 strikes. There should be 150 strikes total/minute." "The final gradation weight must be within what of the total weight of aggregate - Correct Answer 0.2%" "% Passing Formula - Correct Answer 100 - ( Weight Retained ÷ Extracted Agg) × 100" "% Passing 200 Sieve Formula - Correct Answer (Weight Lost from Wash + Weight Retained) ÷ Extracted Aggregate Weight × 100" "When cooled the GMM samples should be no bigger than? - Correct Answer 1/4" (Stones that are bigger than 1/4" are excluded)" "When the Orbital Shaker time is up and pressure is released for the GMM how long do the samples sit? - Correct Answer 10 +/- 1 minute" "When do you fill the flasks for the GMM with water? - Correct Answer Before the 9 minute mark while sitting" "When do you cap the flasks for the GMM samples and weigh them? - Correct Answer After 9 minutes has been reached on the timer and not to exceed 11 minutes" "What temperature of water is used throughout the GMM and GMB testing? - Correct Answer 77 +/- 2°F" "The dry back procedure is used in what circumstance for the GMM - Correct Answer For mix designs to determine the GMM correction factor" "When is the GMM dry back considered dry - Correct Answer Weighed every 15 minutes and when the weight loss is less than 0.5 grams" "Formula for GMM (MSG) - Correct Answer Dry Sample ÷ (SSD or Dry weight + Flask & Water - Flask & Water & Sample)" "Roadway Density Cores Formula - Correct Answer (GMB ÷ GMM) × 100" "If reheating the ignition sample is needed it is done at what temp? - Correct Answer 300°F +/- 9°F" "Determining Mix Design Calibration Factor Formula - Correct Answer Known AC - (WL1 + WL2) ÷ 2" "Determining 8 Sieve Correction Factor - Correct Answer P-8[Solvent] - P-8[Ignition]" "Determining 200 Sieve Correction Factor - Correct Answer P-200[Solvent] - P-200[Ignition]" "Calibrated AC Formula - Correct Answer AC Measured + Correction Factor" "When washing a gradation sample what do you add first water or a wetting agent? - Correct Answer Cover the sample with water first" "What temperature do you dry a gradation sample at? - Correct Answer 230°F-9°F to Compaction Temp +9°F" "How long are gradations shook at? - Correct Answer Determined by a verification process"