13春学期公路勘测与设计原理在线作业2

1、13 春学期公路勘测与设计原理在线作业 2Northeastern University 14 spring 13 autumn East big 13 spring semester highwayNortheastern University 14 spring 13 autumn East 13 spring semester "highway survey and design principle" online homework 2Total score: 100 test time: -Radio examinationJudgment questionRadi

2、o examination questions (10 questions, 50 points)OneHighway design traffic volume should be predicted by ()A. 10 yearsB. 15 yearsC. 20 yearsD. depending on the circumstancesFull marks: 5TwoA flat curve with a design speed of 80km/h is composed of a easement curve and a circle curve, while the minimu

3、m length of the flat curve is ()A. 100mB. 200mC. 150mD. 250mFull marks: 5ThreeThe length of superelevation transition section of freeway is 50m. If the widening value is 0.4m, the widening value is 40mA. 0.25mB. 0.19MC. 0.29MD. 0.33mFull marks: 5FourThe initial traffic volume of a two grade highway

4、is 5000 (pcu/h), if the annual traffic growth rate is 5%Design traffic volume should be ()A. 9900 (pcu/h)B. 12635 (pcu/h)C. 8145 (pcu/h)D. 7388 (pcu/h)Full marks: 5 assignments, the answer did not upload, first for everyone to review the use, if you need to answer the specific, look at my registrati

5、on name to findFiveThe size of the road capacity is in order ()A. design traffic traffic capacitycapacity > basic traffic capacity > possibleB. basic trafficcapacity > possible capacity > design capacityC. basic traffic traffic capacitycapacity > design traffic capacity > possibleD

6、. depending on the circumstancesFull marks: 5SixThe following item does not belong to air resistanceA. inertial forceB. the pressure of the air on the windward sideC. the friction between the air and the side of the carVacuum suction behind the D. vehicleFull marks: 5SevenThe car on the road to thre

7、e resistance coefficient for uniform traffic on the 0.08 Road, if the power factor is equal to the road resistance coefficient, can check the running speed of 30km/h, the speed of current road conditions ()A. minimum running speedB. average speedC. steady running speedD. maximum running speedFull ma

8、rks: 5EightThe design of a 6 Lane Expressway with a speed of 120km/h, the overall width of the subgrade is 34.5m, and the size of each part is generally ()A. 6 x 3.75+3 x 2+2 * 0.75+4.5B. 6 x 3.5+3.75 x 2+2 * 0.75+4.5C. 6 x 3.5+3 x 2+2 *1.5+4.5D. 6 x 3.5+3 x 2+2 *0.75+6Full marks: 5of cohesive soil

9、embankmentexceeds (), two9. when the height kinds of slope gradient should be adoptedA. 12mB. 10mC. 8MD. 6MFull marks: 510. cars should usually travel in ()A. is higher than critical speedB. is below critical speedC. is the critical speedD. maximum speedFull marks: 5Northeastern University 14 spring

10、 13 autumn East 13 spring semester "highway survey and design principle" online homework 2Total score: 100 test time: -Radio examinationJudgment questionJudgment questions (a total of 10 questions, a total of 50 points) 1. when the outer distance of the highway curve is very small, the cur

11、ve can not be laid.B. correctFull marks: 5 2. when the car is loaded, taxiing or braking, the delta =1.A. errorB. correctFull marks: 5ThreeThe compound curve cannot be set when the radius of the small circle is between "no curve, minimumradius" and "no super high minimum radius".

12、A. errorB. correctFull marks: 5FourA compoundcurve can be set when the radius of the small circle is greater than or equal to "no higher, minimum radius".A. errorB. correctFull marks: 5 5., the transverse slope of the soil shoulder is larger than the horizontal slope of the road 1%2%.A hom

13、eworkanswer did not upload, first for everyone to review the use, if you need to answer the specific see my registration name to findB. correctFull marks: 5 6. assumethat the speed is constant when the vehicle is moving into the curve.A. errorB. correctFull marks: 5SevenDesigned traffic capacity is

14、the capacity of a section of a road when the running state of the road traffic is maintained at a certain service level.A. errorB. correctFull marks: 5The plane of the 8. route is the projection of the middle of the road on the horizontal plane.A. errorB. correctFull marks: 5 9. when calculating the limit minimumradius, Muand I usually use maximum values.A. errorB. correctFull marks: 5Tenin an oval curveThe radius of curvature of a tra