Exam Questions and Correct Answers |
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Base Course - 🧠ANSWER ✔✔Layer or layers of specified material of
designated thickness or rate of application based on a subbase or
subgrade to support the subsequent layers
Bridge - 🧠ANSWER ✔✔Over a depression; longer than 20'
The subgrade is the top _______ of roadbed upon which the pavement
structure and shoulders are constructed - 🧠ANSWER ✔✔18"
Do not use glass in the top _____ of the embankment - 🧠ANSWER ✔✔18"
Clear and grub minimum of ____ from each edge of proposed pavement
along both lanes and legs of interchange - 🧠ANSWER ✔✔30'
,Where clearing and grubbing within the roadway is indicated at a bridge
site, clear by cutting all trees, stumps, etc. to within ______ of the ground
or to low water in the full width of the ROW for a distance of 75' beyond the
beginning and end of the proposed bridge - 🧠ANSWER ✔✔8"
Compact the subgrade between the lines ____ inches outside the area
occupied by the pavement structure, including C&G & SW to not less than
95% of max density - 🧠ANSWER ✔✔18"
Pulverize base course material so that the completion of the moist mixing
100% (by dry weight) passes the 1.5" sieve and a minimum of _____
passes the #4 sieve, exclusive of gravel and stone retained on the sieve -
🧠ANSWER ✔✔80%
#4 sieve - 🧠ANSWER ✔✔4.75 mm
Ensure finished surface of base varies neither than 3/8" from a straight
edge 10' long when applied parallel to the CL of the rd, no more than
______ inch from the typical cross-section on the plans - 🧠ANSWER
✔✔1/2"
Thickness of completed modified base is measured at staggered intervals
not to exceed _____ feet in length for two-lane roads - 🧠ANSWER ✔✔250'
, Use _______ in all base courses as an anti-stripping additive - 🧠ANSWER
✔✔hydrated lime
Where plans required uniform thickness of base course and the contract
provides for pavement on sq yd bases, thickness of base course is
determined from measurements taken of the completed base course at
intervals not exceeding _____ feet for two-lane roads - 🧠ANSWER ✔✔500'
For HMA, use aggregates with a combined specific gravity of _____ or less
- 🧠ANSWER ✔✔2.90
ON HMA use pneumo-rollers that are self propelled and have an effective
rolling width of not less than _______ - 🧠ANSWER ✔✔60"
Ensure intermediate rolling of HMA is completed before mat temp drops
below _____ - 🧠ANSWER ✔✔175 degrees
First step in applying asphalt surface treatment (single) - 🧠ANSWER
✔✔Clean surface
Last step in applying asphalt surface treatment (single) - 🧠ANSWER
✔✔Remove excess aggregate
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