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Louisiana (LA) Highway, Street & Bridge Construction Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

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Louisiana (LA) Highway, Street & Bridge Construction Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf Louisiana (LA) Highway, Street & Bridge Construction Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf Louisiana (LA) Highway, Street & Bridge Construction Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

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Louisiana(LA)Highway,Street&Bridge lI lI lI lI lI




ConstructionPracticeExamQuestionsAnd Correct lI lI lI lI Il




Answers (Verified Answers) Plus
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Rationales2026 Q&A| InstantDownloadPdf lI Il lI Il lI Il




1. What is the primary function of the Louisiana Department of
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TransportationandDevelopment(DOTD)inhighwayconstruction?
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A. Issueenvironmental permits lI Il




B. Overseedesign,construction,andmaintenanceof lI lI lI lI lI




transportation infrastructure
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C. Regulatefueltaxes lI lI




D. Approvecontractorbids lI lI




Rationale:DOTDmanagestheentirelifecycleofroad infrastructure lI lI lI lI Il lI lI Il




including design and construction.
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2. Themaximumallowableslumpforstructuralconcreteinbridge
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decks under DOTD standards is generally:
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A. 4 inches
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B. 6 inches
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C. 2 inches
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D. 8 inches
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Rationale:DOTDspecifies4inchesforstandarddeckplacement for lI lI lI lI lI lI lI lI Il




proper workability.
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3. Whatisthepurposeofageotechnicalinvestigationbeforeroad
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construction?
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A. Totestasphaltdurability
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, B. Todeterminesoilbearingcapacityandsuitability
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C. Tomeasurepavementtemperature
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D. Toestimatelaborcost
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Rationale:Soildatadeterminesthefoundationrequirementsfor road lI Il lI lI lI lI lI Il




stability.
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4. Inasphalt paving,the“tackcoat”servesto:
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A. ProtectagainstUVdegradation lI lI lI




B. Bondnewasphaltlayerstotheoldsurface lI lI lI lI lI lI lI




C. Preventoxidation lI




D. Enhanceskidresistance lI lI




Rationale:Tackcoatensuresadhesionbetweenasphaltlayers. lI lI lI lI lI lI lI




5. TheLouisianastandardspecificationforcompactionrequires
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subgrade to be compacted to at least:
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A. 90%ofmaximumdrydensity lI lI lI lI




B. 95%ofmaximumdry density lI Il lI lI




C. 85%ofmaximumdrydensity lI lI lI lI




D. 100%of maximumdrydensity lI Il lI lI




Rationale:DOTDtypicallyrequires95%compactionfor subgrade under lI lI lI lI lI lI Il Il




highways.
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6. Whichtestisused todeterminetheplasticityofsoil?
lI lI lI Il lI lI lI lI lI




A. Sieveanalysis lI




B. Atterberglimitstest lI lI




C. CBRtest lI




D. Moisture-density test Il




Rationale:Atterberglimitsclassifyfine-grainedsoilsbyplasticity and lI lI lI lI lI lI lI Il




consistency.
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, 7. Inconcretebridge construction,what istheminimumcuring time
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before form removal, unless otherwise specified?
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A. 7 days Il




B. 3daysoruntilsufficientstrengthisachieved
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C. 24hours lI




D. 10days lI




Rationale:Earlyremovalisallowediftestcylindersconfirm adequate lI lI Il lI lI lI lI lI Il




strength.
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8. A“crown”inhighwaydesignrefersto:
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A. Edgedrainage lI




B. The highestpointinthecenterof theroadway lI Il lI lI lI lI Il lI




C. Medianbarrier lI




D. Pavement shoulder Il




Rationale:Thecrownallowsforwaterr unoff tobothsides. lI lI lI lI lI lI lI lI lI




9. Thetypicalbitumencontentinasphaltconcretemixranges
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between:
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A. 3–4%
B. 4–6%
C. 7–9%
D. 1–3%
Rationale:Optimumasphaltbindercontentgenerallylieswithin 4– lI lI lI lI Il lI lI Il




6% by weight. Il Il




10. Whatisthemainfunctionofexpansionjointsinbridges? lI lI lI lI lI lI lI lI lI




A. Preventcorrosion lI




B. Increasestiffness lI




C. Allowmovementduetotemperaturechanges lI lI lI lI lI




D. Reduceloadcapacity lI lI

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