CE-404 Transportation Engineering-I - Jun 2023 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aDefine the terms hauling capacity and tractive effort. List out various materials used as ballast. Also give requirement of Good ballast.
   How to answer

   • Define hauling capacity and tractive effort with formulas
   • List ballast materials: broken stone, gravel, sand, moorum, brick ballast, etc.
   • Requirements of good ballast: durability, hardness, drainage, workability, economy
2. 7 Marks
   bWhat do you mean by coning of wheels? Also discuss its advantages.
   How to answer

   • Define coning of wheels: 1 in 20 slope on wheel tread
   • Purpose: lateral movement on curves, reduce wear
   • Advantages: smooth running, reduced flange wear, self-centering
3. 7 Marks
   aWhat do you understand by Super elevation? With the help of neat sketch, explain the advantages of negative super elevation.
   How to answer

   • Define super elevation / cant: outer rail raised on curve
   • Neat cross-section sketch showing inner/outer rail, cant
   • Negative super elevation: when outer rail lower, its conditions and advantages
4. 7 Marks
   bExplain principles of signaling and inter locking. What do you mean by widening of gauge on curved track?
   How to answer

   • Principles of signalling: block, route, speed control
   • Interlocking: interconnection of points and signals for safety
   • Widening of gauge on curved track: need, causes, allowances
5. 7 Marks
   aExplain the following terms:

   1. i)Selection of site of bridge
   2. ii)Afflux
   How to answer

   • Factors for selection of bridge site: alignment, foundation, hydrology, economy
   • Define afflux: rise in water level due to obstruction by bridge
   • Effects and calculation significance of afflux
6. 7 Marks
   bList out various types of bridge foundations. Also explain suitable materials used in bridges.
   How to answer

   • Types of bridge foundations: open, pile, well, caisson
   • Suitable materials: stone, concrete, steel, timber, RCC
   • Selection criteria based on soil and load
7. 7 Marks
   aWrite a short note on Bridge failure.
   How to answer

   • Definition and causes of bridge failure
   • Types: hydraulic, structural, foundation failure
   • Examples and preventive measures
8. 7 Marks
   bDiscuss the various precautions to be taken while sinking of well.
   How to answer

   • Well sinking process and tilting/shifting risks
   • Precautions: uniform dredging, kentledge, plumb control
   • Safety measures for workers and steining
9. 7 Marks
   aBriefly explain IRC Loading classifications for a bridge.
   How to answer

   • Need for IRC loading standards for bridge design
   • Classes: IRC Class AA, A, B, 70R etc. with vehicle loads
   • Application based on bridge type and importance
10. 7 Marks
    bWrite notes on the following:

    1. i)Sheet Piles
    2. ii)Coffer Dams
    3. iii)Wing Wall
    4. iv)Return Wall
    How to answer

    • Define sheet piles, coffer dams, wing wall, return wall
    • Function and location in bridge works
    • Sketch / types where relevant
11. 7 Marks
    aExplain the different methods of strengthening of bridges.
    How to answer

    • Need for strengthening: increased load, deterioration
    • Methods: jacketing, external prestressing, plate bonding, replacement
    • Suitability and procedure of each method
12. 7 Marks
    bDescribe pressure relief phenomenon. Discuss anyone method of tunneling in hard rock.
    How to answer

    • Pressure relief phenomenon in tunnelling in rock
    • Stress redistribution around opening
    • One hard-rock tunnelling method: drilling-blasting, heading and bench, etc.
13. 7 Marks
    aWhy lining is done in tunnels, what are its advantages? What are various types of lining used in tunnels and also write its different methods.
    How to answer

    • Purpose of tunnel lining: support, waterproofing, smooth surface
    • Advantages: stability, durability, reduced maintenance
    • Types: concrete, brick, timber, steel; methods of placing
14. 7 Marks
    bWrite a detailed note on any two important tunnel of India or abroad.
    How to answer

    • Select two important tunnels e.g., Jawahar, Pir Panjal, Channel Tunnel
    • Salient features: length, location, geology, construction method
    • Importance and operational significance
15. 14 Marks
    Explain the following terms:

    1. a)Mucking operation
    2. b)Abutment and piers
    3. c)Marshalling yard.
    How to answer

    • Mucking operation: removal of excavated muck in tunnelling
    • Abutment and piers: supports, types and functions in bridges
    • Marshalling yard: layout, functions in railway operation