Railway Track Maintenance Tiers
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Questions and Answers

What is the primary purpose of heaping up ballast in the tamping zone?

  • To provide additional clean ballast
  • To renew broken sleepers
  • To ensure effective packing (correct)
  • To make up low cess
  • What should be done to obstructions such as signal rods, cables, and pipes?

  • They should be ignored by the tamping operator
  • They should be adjusted by the JE/SSE/P.Way
  • They should be left untouched
  • They should be removed preferably (correct)
  • Why is it important to adjust the tamping depth?

  • To ensure effective packing
  • To provide additional clean ballast
  • To make up low cess
  • To avoid damage to the sleepers (correct)
  • What is the recommended adjustment for the gap between the top edge of the tamping blade and the bottom edge of the sleeper?

    <p>15 mm to 20 mm</p> Signup and view all the answers

    What is the purpose of marking slew, super elevation, and lift value on every second/third sleeper?

    <p>To guide the operator for levelling up correctly</p> Signup and view all the answers

    Why should the tamping tools be inserted centrally between the sleepers into the ballast?

    <p>To avoid damage to the sleepers</p> Signup and view all the answers

    What should be done with obstructions that cannot be removed?

    <p>They should be marked clearly and made known to the tamping operator</p> Signup and view all the answers

    What is the recommended temperature range for surface preparation?

    <p>Between 10°C and 50°C</p> Signup and view all the answers

    How many coats of anti-corrosive bituminous black paint should be applied?

    <p>Two coats of 100 microns each</p> Signup and view all the answers

    What should be done to hogged joints before tamping?

    <p>They should be attentioned</p> Signup and view all the answers

    What is the recommended interval between the two coats of paint?

    <p>8 hours</p> Signup and view all the answers

    Why is wire brushing done at the end of surface preparation?

    <p>To obtain a uniform rubbed surface</p> Signup and view all the answers

    What should be painted with anti-corrosive black bituminous paint?

    <p>The liners and Elastic Rail Clips</p> Signup and view all the answers

    Why should chemical not be used for surface preparation?

    <p>It can interfere with the paint</p> Signup and view all the answers

    How often should bituminous painting of rails be done in identified corrosion prone areas?

    <p>Once a year on the inside of the gauge face and once in three years on the non-gauge face</p> Signup and view all the answers

    What should be avoided during surface preparation?

    <p>Doing it in rainy season</p> Signup and view all the answers

    What is the primary responsibility of the Sectional JE/SSE P.Way/ (MMG) in the Mobile Maintenance Gang?

    <p>To oversee the maintenance of a section of track with a jurisdiction of about 70-80 km</p> Signup and view all the answers

    What is the name of the vehicle that the Mobile Maintenance Gang is based on?

    <p>Rail Borne Maintenance Vehicle (RBMV)</p> Signup and view all the answers

    What is the purpose of the dynamic track stabilizers in the On-track Machines Unit (OMU)?

    <p>To stabilize the track</p> Signup and view all the answers

    What is the main function of the ballast regulating machines in the On-track Machines Unit (OMU)?

    <p>To redistribute the ballast</p> Signup and view all the answers

    What is the responsibility of the Sectional Gangs in the track maintenance?

    <p>To carry out the activities listed under the Mobile Maintenance Gang</p> Signup and view all the answers

    What is the purpose of the shoulder ballast cleaning machines in the On-track Machines Unit (OMU)?

    <p>To clean the shoulder ballast</p> Signup and view all the answers

    What is the jurisdiction of the Mobile Maintenance Gang in a single line section?

    <p>70-80 km</p> Signup and view all the answers

    What is the primary purpose of the UTV in the On-track Machines Unit (OMU)?

    <p>To pick up and transport material</p> Signup and view all the answers

    What is the code for a foot transverse break at the rail seat?

    <p>2511</p> Signup and view all the answers

    What is the procedure for sending samples for metallurgical investigation in case of a fractured rail?

    <p>Send both pieces of approximately 500mm long each containing the fractured faces</p> Signup and view all the answers

    What is the purpose of protecting the fractured faces with mineral jelly and hessian cloth?

    <p>To prevent damage in transit</p> Signup and view all the answers

    What is the code for an internal flaw in the head with a transverse breakage?

    <p>111</p> Signup and view all the answers

    Who receives a copy of the metallurgical investigation report?

    <p>Both A and B</p> Signup and view all the answers

    What is the purpose of sending a rail failure report with the sample?

    <p>To provide additional information about the failure</p> Signup and view all the answers

    What is the code for a foot vertical longitudinal crack?

    <p>253</p> Signup and view all the answers

    What is the length of the rail piece that should be sent for metallurgical investigation?

    <p>1m long</p> Signup and view all the answers

    Under whose supervision should the work of deep screening be done?

    <p>An official not lower in rank than the JE/P.Way</p> Signup and view all the answers

    What should be predetermined before starting the deep screening operation?

    <p>The daily output, depending on the time allowance, availability of labour, and extent of ballasting/screening to be done</p> Signup and view all the answers

    In which direction should the deep screening work proceed on a double line?

    <p>In the direction opposite to that of the traffic</p> Signup and view all the answers

    What is the purpose of removing the ballast from space 'A' and 'B' in Stage I of deep screening?

    <p>To support the rail for passing trains</p> Signup and view all the answers

    What should be done to the ballast after it is removed from under sleeper '1' in Stage II?

    <p>It should be screened and placed back under sleeper '1'</p> Signup and view all the answers

    What should be done to the wooden blocks in space 'A' after Stage III?

    <p>They should be removed</p> Signup and view all the answers

    What should be done to the ballast in space 'C' after it is removed in Stage V?

    <p>It should be placed in space 'A' up to the bottom of the sleeper</p> Signup and view all the answers

    What is the purpose of supporting the rail with wooden blocks in Stage VI?

    <p>To support the rail for passing trains</p> Signup and view all the answers

    Study Notes

    Track Maintenance

    • Track maintenance is divided into three tiers: On-track Machines Unit (OMU), Mobile Maintenance Gang (MMG), and Sectional Gangs.

    On-track Machines Unit (OMU)

    • OMU machines are used for track maintenance, including:
      • Tie-tamping machines for plain track and points and crossings
      • Shoulder ballast cleaning machines
      • Ballast cleaning machines
      • Ballast regulating machines
      • Dynamic track stabilizers
      • UTV
    • These machines are used to carry out jobs such as:
      • Systematic tamping of plain track and points and crossings
      • Intermediate tamping of plain track and points and crossings
      • Shoulder ballast cleaning
      • Ballast profiling/redistribution
      • Track stabilization
      • Periodical deep screening
      • Picking up and transportation of material

    Mobile Maintenance Gang (MMG)

    • MMG is a team that carries out maintenance activities, headed by a sectional JE/SSE P.Way/MMG
    • MMG is based on a Rail Borne Maintenance Vehicle (RBMV) for mobility
    • Functions of MMG include:
      • Repair to rail/weld fracture, including in-situ AT welding
      • Attention to SEJs
      • Heaping up of ballast in the tamping zone
      • Making up of low cess
      • Cleaning of pumping joints and providing additional clean ballast
      • Attention to hogged joints before tamping
      • Tightening of all fittings and fastenings
      • Renewing broken and damaged sleepers
      • Squaring of sleepers and spacing adjustment
      • Re-gauging as necessary
      • Adjusting creep and expansion gap in rails
      • Examination of rails for cracks, sleepers, and fastenings
      • Survey for realignment of curves
      • Clearing of ballast on sleepers to make them visible to the operator

    Tamping Operations

    • Tamping operator and JE/SSE/P.Way should observe the following points:
      • Adjust tamping depth to 15 mm to 20 mm
      • Ensure tamping tools are inserted centrally between sleepers into the ballast
      • Apply anticorrosive bituminous coating to rails in corrosion-prone areas
      • Prepare rail surface with hand or power-operated tools
      • Paint rails with anti-corrosive black bituminous paint in two coats of 100 microns each
      • Paint liners and elastic rail clips with anti-corrosive black bituminous paint

    Failure of Imported Rails

    • In case of rail failure within the guarantee period, send a rail piece approximately 1m long containing the fracture/flaw to the Chemist and Metallurgist for investigation
    • Protect the fractured faces with mineral jelly and hessian cloth during transit
    • Cracked rails may be dispatched with suitable protection

    Screening Operations

    • Screening operations should be carried out under the supervision of an official not lower in rank than JE/P.Way
    • Determine daily output based on time allowance, labor availability, and extent of ballasting/screening
    • Plan speed restrictions and issue necessary notices
    • Proceed with screening work in the direction opposite to traffic on double lines
    • The detailed procedure for deep screening involves five stages, including removing ballast, screening, and replacing it under sleepers.

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    Related Documents

    Regular Track Maintenance PDF

    Description

    This quiz covers the three tiers of track maintenance, including On-track Machines Unit (OMU), Mobile Maintenance Gang (MMG), and Sectional Gangs. Learn about the different machines used for track maintenance.

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