13春学期《公路勘测与设计原理》在线作业2.docx
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13春学期《公路勘测与设计原理》在线作业2
13春学期《公路勘测与设计原理》在线作业2
NortheasternUniversity14spring13autumnEastbig13springsemesterhighway
NortheasternUniversity14spring13autumnEast13springsemester"highwaysurveyanddesignprinciple"onlinehomework2
Totalscore:
100testtime:
-
Radioexamination
Judgmentquestion
Radioexaminationquestions（10questions,50points）
One
Highwaydesigntrafficvolumeshouldbepredictedby（）
A.10years
B.15years
C.20years
D.dependingonthecircumstances
Fullmarks:
5
Two
Aflatcurvewithadesignspeedof80km/hiscomposedofaeasementcurveandacirclecurve,whiletheminimumlengthoftheflatcurveis（）
A.100m
B.200m
C.150m
D.250m
Fullmarks:
5
Three
Thelengthofsuperelevationtransitionsectionoffreewayis50m.Ifthewideningvalueis0.4m,thewideningvalueis40m
A.0.25m
B.0.19M
C.0.29M
D.0.33m
Fullmarks:
5
Four
Theinitialtrafficvolumeofatwogradehighwayis5000（pcu/h）,iftheannualtrafficgrowthrateis5%
Designtrafficvolumeshouldbe（）
A.9900（pcu/h）
B.12635（pcu/h）
C.8145（pcu/h）
D.7388（pcu/h）
Fullmarks:
5assignments,theanswerdidnotupload,firstforeveryonetoreviewtheuse,ifyouneedtoanswerthespecific,lookatmyregistrationnametofind
Five
Thesizeoftheroadcapacityisinorder（）
A.designtrafficcapacity>basictrafficcapacity>possibletrafficcapacity
B.basictrafficcapacity>possiblecapacity>designcapacity
C.basictrafficcapacity>designtrafficcapacity>possibletrafficcapacity
D.dependingonthecircumstances
Fullmarks:
5
Six
Thefollowingitemdoesnotbelongtoairresistance
A.inertialforce
B.thepressureoftheaironthewindwardside
C.thefrictionbetweentheairandthesideofthecar
VacuumsuctionbehindtheD.vehicle
Fullmarks:
5
Seven
Thecarontheroadtothreeresistancecoefficientforuniformtrafficonthe0.08Road,ifthepowerfactorisequaltotheroadresistancecoefficient,canchecktherunningspeedof30km/h,thespeedofcurrentroadconditions（）
A.minimumrunningspeed
B.averagespeed
C.steadyrunningspeed
D.maximumrunningspeed
Fullmarks:
5
Eight
Thedesignofa6LaneExpresswaywithaspeedof120km/h,theoverallwidthofthesubgradeis34.5m,andthesizeofeachpartisgenerally（）
A.6x3.75+3x2+2*0.75+4.5
B.6x3.5+3.75x2+2*0.75+4.5
C.6x3.5+3x2+2*1.5+4.5
D.6x3.5+3x2+2*0.75+6
Fullmarks:
5
9.whentheheightofcohesivesoilembankmentexceeds（）,twokindsofslopegradientshouldbeadopted
A.12m
B.10m
C.8M
D.6M
Fullmarks:
5
10.carsshouldusuallytravelin（）
A.ishigherthancriticalspeed
B.isbelowcriticalspeed
C.isthecriticalspeed
D.maximumspeed
Fullmarks:
5
NortheasternUniversity14spring13autumnEast13springsemester"highwaysurveyanddesignprinciple"onlinehomework2
Totalscore:
100testtime:
-
Radioexamination
Judgmentquestion
Judgmentquestions（atotalof10questions,atotalof50points）
1.whentheouterdistanceofthehighwaycurveisverysmall,thecurvecannotbelaid.
A.error
B.correct
Fullmarks:
5
2.whenthecarisloaded,taxiingorbraking,thedelta=1.
A.error
B.correct
Fullmarks:
5
Three
Thecompoundcurvecannotbesetwhentheradiusofthesmallcircleisbetween"nocurve,minimumradius"and"nosuperhighminimumradius".
A.error
B.correct
Fullmarks:
5
Four
Acompoundcurvecanbesetwhentheradiusofthesmallcircleisgreaterthanorequalto"nohigher,minimumradius".
A.error
B.correct
Fullmarks:
5
5.,thetransverseslopeofthesoilshoulderislargerthanthehorizontalslopeoftheroad1%~2%.
Ahomeworkanswerdidnotupload,firstforeveryonetoreviewtheuse,ifyouneedtoanswerthespecificseemyregistrationnametofind
B.correct
Fullmarks:
5
6.assumethatthespeedisconstantwhenthevehicleismovingintothecurve.
A.error
B.correct
Fullmarks:
5
Seven
Designedtrafficcapacityisthecapacityofasectionofaroadwhentherunningstateoftheroadtrafficismaintainedatacertainservicelevel.
A.error
B.correct
Fullmarks:
5
Theplaneofthe8.routeistheprojectionofthemiddleoftheroadonthehorizontalplane.
A.error
B.correct
Fullmarks:
5
9.whencalculatingthelimitminimumradius,MuandIusuallyusemaximumvalues.
A.error
B.correct
Fullmarks:
5
Ten
Theradiusofcurvatureofatransitioncurveinanovalcurvevariesbetweenaninfinityandasmallradius.
A.error
B.correct
Fullmarks:
5
Homeworkanswerdidnotupload,firstforeveryonetoreviewtheuse,ifyouneedtoanswerthespecificseemyregistrationnametofind
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