CE-404 Transportation Engineering-I - Jun 2022 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
   aExplain rail route survey.
   How to answer

   • Definition and purpose of rail route survey
   • Stages: reconnaissance, preliminary and final location survey
   • Data collected: topography, traffic, geology, alignment controls
   • Selection of best alignment and report/drawings
2. 7 Marks
   bWhat do you mean by coning of wheels? Also discuss its advantages.
   How to answer

   • Definition of coning of wheels - 1 in 20 slope on tread
   • Purpose: lateral movement, reduce wear, smooth riding
   • Mechanism on straight and curved track
   • Advantages listed with diagram
3. 7 Marks
   aWith the help of neat sketch, Explain advantages of negative super elevation.
   How to answer

   • Definition of negative super elevation / cant deficiency context
   • Neat cross-section sketch of outer rail lower than inner on branch curve
   • Conditions where provided: branch line meets main line on curve
   • Advantages: smooth running, reduced wear, safety
4. 7 Marks
   bWhat do you mean by widening of gauge on curved track also discuss its Importance?
   How to answer

   • Meaning of widening of gauge on curves
   • Need: rigid wheel base and curve negotiation
   • IRC/railway formula basis for extra width
   • Importance for safety and reduced wear derailment prevention
5. 7 Marks
   aDiscuss the various factors affecting site selection of a bridge.
   How to answer

   • Topographical, hydrological and geological factors
   • Traffic, alignment, navigational and economic factors
   • Sub-soil, foundation and construction material availability
   • Conclusion on ideal site selection
6. 7 Marks
   bBriefly explain IRC loading classification for a bridge.
   How to answer

   • Need for IRC loading standards
   • Classes: IRC Class AA, Class A, Class B and 70R
   • Axle loads, spacing and applicability
   • Selection criteria for bridge type
7. 7 Marks
   aDefine copper dam. Discuss its classification.
   How to answer

   • Definition of coffer dam as temporary watertight enclosure
   • Purpose in bridge foundation construction
   • Classification: earthen, rockfill, single/double wall, cellular, etc.
   • Suitability and neat sketches
8. 7 Marks
   bDiscuss the various precautions to be taken while sinking of well.
   How to answer

   • Process of well sinking for bridge foundations
   • Precautions: verticality, uniform dredging, steining care
   • Safety against tilting, shifting, sand blows
   • Use of kentledge, divers and dewatering control
9. 7 Marks
   aDiscuss any one method of tunneling in hard rock
   How to answer

   • Conditions for tunnelling in hard rock
   • Method e.g. full-face or heading and bench with drilling-blasting
   • Steps: drilling, blasting, mucking, ventilation, lining
   • Advantages, limitations and equipment
10. 7 Marks
    bDiscuss stages involved in bridge investigation.
    How to answer

    • Reconnaissance and preliminary investigation
    • Topographic, hydrological, geotechnical surveys
    • Traffic, alignment and economic studies
    • Final report, site plan and design data
11. 7 Marks
    aWrite method of creation of steel girder bridges.
    How to answer

    • Types of steel girder bridges: plate, box, truss
    • Fabrication, erection and launching method
    • Connections: riveted/welded, bearings
    • Advantages and maintenance
12. 7 Marks
    bCompare steel sleeper and concrete sleeper suggest which is best.
    How to answer

    • Properties of steel sleeper vs concrete sleeper
    • Comparison on durability, cost, maintenance, weight
    • Suitability for different traffic and track
    • Conclusion on which is best with justification
13. 7 Marks
    aEnlist defects in bridge and its corresponding remedial measures to be required by bridge engineer.
    How to answer

    • Common defects: cracking, corrosion, scour, settlement
    • Causes in substructure, superstructure and bearings
    • Corresponding remedial measures: grouting, jacketing, replacement
    • Role of bridge engineer in inspection and maintenance
14. 7 Marks
    bDifferentiate between junction, Terminal, yard.
    How to answer

    • Definitions of junction, terminal and yard
    • Functions and layout differences
    • Tabular comparison on purpose and facilities
    • Examples of each
15. 14 Marks
    Write a short note on

    1. a)Functions of ballast
    2. b)Working principle of turnout
    3. c)Types of gradient
    How to answer

    • Ballast functions: load distribution, drainage, stability
    • Turnout working: switch, crossing, lead for diverging track
    • Gradients: ruling, momentum, pusher, station yard types
    • Brief notes with sketches where needed