Download AKTU B-Tech 5th Sem 2017-2018 NCE 502 Transportation Engineering I Question Paper

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Sub Code: NCE-502

B. TECH.

(SEM V) THEORY EXAMINATION 2017-18

TRANSPORTATION ENGINEERING-I

Note: Attempt all Sections. If any missing data required, then choose suitably.

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SECTION A

1. Attempt all questions in brief. 2 x 10 = 20
   1. Draw typical cross section of Macadam's construction.
   2. Write short note on IRC.
   3. Define Kerbs and shoulders.
   4. What do you understand by setback distance.

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   5. Explain passenger car unit (PCU).
   6. Write any two advantages and disadvantages of traffic signals.
   7. What is kerb marking and object marking?
   8. Explain Flash and fire point in bitumen.
   9. Discuss Expansion and Contraction joint.

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   10. Define Equivalent single wheel load (ESWL).

SECTION B

2. Attempt any three of the following: 10 x 3 = 30
   1. Calculate the length of transition curve and the shift using the following data;
      Design speed = 65 kmph
      

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      Radius of circular curve = 220 m
      Allowable rate of introduction of superelevation (pavement rotated about the centre line) = 1 in 150
      Pavement width including extra widening = 7.5 m
   2. What are the various surveys to be carried out before planning a highway system for a given area? Explain briefly.
   3. Calculate the stresses at interior, edge and corner of a cement concrete pavement by Westergaard's stress equations :
      

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      Modulus of elasticity of concrete = 3.0×10⁵ kg/cm²
      Poisson ratio for concrete = 0.15
      Thickness of concrete pavement = 18 cm
      Modulus of subgrade reaction = 8.5 kg/cm²
      Wheel load = 5100 kg
      

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      Radius of loaded area = 15 cm modulus of subgrade reaction= 6.0 kg/cm³
      Radius of contact area= 15 cm.
   4. Briefly outline the main features of various road patterns commonly in use.
   5. An ascending gradient of 1 in 50 meets a descending gradient of 1 in 80. Determine length of summit curve to provide (a) ISD (b) OSD, for design speed of 80 kmph. Assume all other data.

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SECTION C

3. Attempt any one part of the following: 10 x 1 = 10
   1. Briefly discuss the historical development of road construction. What are salient features of early roman roads? How do these differ from the present day road construction?

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   2. Write a short notes on:
      1. Central road fund
      2. Nagpur road plan
      3. Star and Grid pattern
      4. Jayakar Committee

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4. Attempt any one part of the following: 10 x 1 = 10
   1. Explain the factors based on which the length of valley curve is designed.
   2. Calculate the length of transition curve for a design speed of 80 kmph at horizontal curve of radius 300 m in rural area. Assume suitable data. Derive an expression for calculating the overtaking sight distance on a highway Calculate the stopping sight distance for design speed of 100 kmph. Take the total reaction time 2.5 seconds and coefficient of friction = 0.35.

5. Attempt any one part of the following: 10 x 1 = 10
   1. Explain the following terms :
      1. Traffic Volume

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      2. Traffic Density
      3. Space Mean Speed
      4. Passenger Car Units
   2. With neat sketches show various types of traffic signs and signals, classifying them in proper groups.

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6. Attempt any one part of the following: 10 x 1 = 10
   1. Explain the CBR method of pavement design. How is this method useful to determine thickness of component layers.
   2. List different types of cutbacks. When are these used ? Discuss in brief the tests carried out on cutback bitumen ?

7. Attempt any one part of the following: 10 x 1 = 10
   1. Write short notes on:
      1. Seal coat

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      2. Sheet asphalt
      3. Mastic asphalt
   2. Discuss the specification of course aggregate and binding materials required in WBM construction. Further explain how the following steps in WBM Construction are carried out:
      1. Spreading of course aggregates
      2. Application of binding material

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