Infrastructure for Freight Yards and Depots
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Questions and Answers

How many MIG/MAG welding sets are required in the ROH Depot for maintenance of stainless steel wagons?

  • 4 Sets
  • 2 Sets
  • 1 Set
  • 3 Sets (correct)

Which piece of equipment is required in the least quantity for stainless steel wagon maintenance at the freight yard?

  • MIG/MAG welding sets
  • Portable grinding machine
  • Lock bolts equipment (correct)
  • Portable Air Plasma cutting machine

What is the maximum capacity of the portable air plasma cutting machine required?

  • 12 mm
  • 14 mm
  • 16 mm (correct)
  • 18 mm

Which consumables are stated as required for maintenance but do not have a specified quantity?

<p>Plasma machine consumables (A), Stainless steel wire brushes (B), Welding electrodes (D)</p> Signup and view all the answers

What type of welding equipment has an amp rating mentioned as 600 Amp in the document?

<p>DC Arc welding (B)</p> Signup and view all the answers

Which equipment is specifically mentioned to have dedicated grinding wheels and discs for stainless steel maintenance?

<p>Portable grinding machine (C)</p> Signup and view all the answers

For how many stainless steel wagons is the sick line required to maintain welding resources?

<p>5 wagons/day (D)</p> Signup and view all the answers

How many portable electric grinders are listed in the equipment inventory?

<p>3 Nos. (C)</p> Signup and view all the answers

Which piece of equipment has a capacity of 10t?

<p>Road crane (D)</p> Signup and view all the answers

What type of machine is listed as having a voltage stabilizer?

<p>Surface wheel lathe (C)</p> Signup and view all the answers

How many sets of pneumatic torque wrenches are available?

<p>4 sets (B)</p> Signup and view all the answers

Which equipment is specifically mentioned for diagnosing roller bearings?

<p>Magnetic flaw detector (D)</p> Signup and view all the answers

What is the minimum targeted capacity for a Mega Depot in ROH outturn per month?

<p>250 to 500 (A)</p> Signup and view all the answers

What type of communication system is recommended for effective communication across teams?

<p>CUG mobile phones or walkie talkie sets (C)</p> Signup and view all the answers

What is the purpose of the comprehensive contract recommended for major and mega yards?

<p>To cover day-to-day upkeep including scrap lifting and bush cutting (C)</p> Signup and view all the answers

How often does an air brake wagon typically visit the depot for scheduled ROH?

<p>Once every 18 months (A)</p> Signup and view all the answers

Which type of vehicle is NOT mentioned as part of the material handling recommendations?

<p>Transport vans (A)</p> Signup and view all the answers

What type of luminance is recommended for the covered shed?

<p>Alternate rows of metal halide lamps and T-5 tube lights (C)</p> Signup and view all the answers

What is the distance at which an electric panel with a junction box should be located?

<p>30 m (B)</p> Signup and view all the answers

Which of the following is included in the recommended running contract for maintenance?

<p>Maintenance of major M&amp;P like EOT cranes and hydraulic jacks (D)</p> Signup and view all the answers

How many visits does an air brake wagon have for out-of-course repairs on average?

<p>Twice during 18 months (B)</p> Signup and view all the answers

What is a primary function of the VHF sets/CUG phones in the work environment?

<p>To facilitate close monitoring and communication (C)</p> Signup and view all the answers

Which of the following is NOT listed as a necessary machinery item for train examination during yard maintenance?

<p>Electric saws (A)</p> Signup and view all the answers

Which tool is specifically used to measure 'A' dimension in fitters' tools?

<p>Gauge for measuring 'A' dimension (C)</p> Signup and view all the answers

What is the purpose of the Lister truck in a maintenance setup?

<p>To carry materials such as brake blocks (B)</p> Signup and view all the answers

Which of the following tools is NOT part of the fitters' essential toolkit?

<p>Gas/ Plasma cutting set (C)</p> Signup and view all the answers

What is the minimum capacity of the DG set mentioned for maintenance purposes?

<p>200 kva (C)</p> Signup and view all the answers

Which of the following is used to detect wheel tyre defects?

<p>Wheel tyre defect gauge (B)</p> Signup and view all the answers

Which tool is used for measuring spring camber?

<p>Cord for measuring spring camber (D)</p> Signup and view all the answers

What type of lamps are referred to for use during inspections?

<p>Portable LED type inspection lamps (B)</p> Signup and view all the answers

Which of these tools is explicitly required to be available in the Section Engineer's office?

<p>Tape measure – 3 m (A)</p> Signup and view all the answers

What is the required center distance between the examination, sick, and fit lines?

<p>7.5 m (B)</p> Signup and view all the answers

What type of floor is specified for the examination yard area?

<p>Abrasion resistance granolithic concrete (B)</p> Signup and view all the answers

How many EOT cranes are required for yards handling up to 10 rakes per day?

<p>7 (A)</p> Signup and view all the answers

What is the purpose of the rail cum road shunting vehicle mentioned in the document?

<p>To create gaps between wagons and facilitate air brake testing (D)</p> Signup and view all the answers

What is the lifting capacity of the EOT cranes specified for the freight yard?

<p>30 tonnes (D)</p> Signup and view all the answers

Which statement accurately describes the electrical overhead equipment (OHE) provision in the yard?

<p>OHE must not be installed over examination or sick yard lines. (D)</p> Signup and view all the answers

What type of device is TXR provided with for recalling defects?

<p>Industrial type Personal Digital Assistant (PDA) (D)</p> Signup and view all the answers

What is the specific requirement for the examination lines in terms of weather conditions?

<p>Must be under a covered shed for all weather working (B)</p> Signup and view all the answers

In what scenario is a dedicated engine required, according to the document?

<p>When the rake is received with electric locomotive (B)</p> Signup and view all the answers

Which equipment is specified to have a quantity based on requirements in the office equipment section?

<p>PC terminal (A), Air conditioner (B)</p> Signup and view all the answers

How many hydraulic jacks are mentioned as necessary in the miscellaneous equipment section?

<p>2 Nos. (C)</p> Signup and view all the answers

Which of the following items is explicitly stated to have its quantity specified as per requirement?

<p>Kitchen equipment (B), Fitter's lockers (C)</p> Signup and view all the answers

What is the total number of first aid equipment sets mentioned?

<p>4 sets (C)</p> Signup and view all the answers

Which type of telephone equipment is included with a specified quantity of 10 lines?

<p>Intercom (D)</p> Signup and view all the answers

What equipment has the highest quantity requirement in the ROH Depot for stainless steel wagon maintenance?

<p>Portable grinding machine (C)</p> Signup and view all the answers

Which item is specifically listed for use in the grinding process for stainless steel maintenance?

<p>Dedicated grinding wheels &amp; discs (A)</p> Signup and view all the answers

Which materials are welding electrodes required for as per the standards mentioned?

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

What is the required number of lock bolts sets in the freight yard for maintenance?

<p>As per requirement (B)</p> Signup and view all the answers

What is the maximum cutting capacity of the portable air plasma machine stated?

<p>16 mm (C)</p> Signup and view all the answers

Which of the following is NOT explicitly mentioned as a consumable for maintaining stainless steel wagons?

<p>Portable grinding wheels (C)</p> Signup and view all the answers

Which combination of welding equipment is required in the highest quantity across all locations?

<p>MIG/MAG and DC Arc Welding machinery (B)</p> Signup and view all the answers

Which of the following tools is essential for measuring the 'A' dimension during maintenance?

<p>GO/NO GO gauge (A)</p> Signup and view all the answers

What is the minimum capacity of the DG set stated for maintenance operations?

<p>200 kVA (A)</p> Signup and view all the answers

Which machinery is specifically mentioned for transportation of men and materials across the yard?

<p>Multi utility vehicle (B)</p> Signup and view all the answers

Which item is explicitly required in the Section Engineer/Junior Engineer (C&W) office besides various jacks?

<p>Sledge hammer (B)</p> Signup and view all the answers

What type of cutting set is required for maintenance tasks in the yard?

<p>Gas/Plasma cutting set (C)</p> Signup and view all the answers

Which of the following is NOT listed as a tool for fitters in the content?

<p>Torque wrench (A)</p> Signup and view all the answers

Which tool is indicated for the inspection of wheel tyre defects?

<p>Wheel tyre defect gauge (C)</p> Signup and view all the answers

What is specified for use during inspections in the yard operations?

<p>LED inspection lamps (B)</p> Signup and view all the answers

Which device is mentioned for diagnosing roller bearings?

<p>Non-contact hot axle detector (D)</p> Signup and view all the answers

Which machinery and plant is essential in the body section for performing welding operations?

<p>MIG welding sets (B)</p> Signup and view all the answers

What is the specific quantity of EOT cranes needed for the bogie section?

<p>2 Nos. (D)</p> Signup and view all the answers

Which of the following sections requires a portable grit blasting machine?

<p>Body shop (B)</p> Signup and view all the answers

Which plant is listed as having a requirement for 50 units in the bogie section?

<p>Stores bin (A)</p> Signup and view all the answers

Which type of machine is included in the body section to assist with material handling?

<p>Winches (B)</p> Signup and view all the answers

For what purpose is the air brake equipment section included in the depot?

<p>Repair and maintenance of air braking systems (A)</p> Signup and view all the answers

How many welding machines are required in the body section for effective operations?

<p>4 Nos. (C)</p> Signup and view all the answers

What is the primary distinguishing feature of a CMT laboratory in a depot?

<p>Material testing and analysis (B)</p> Signup and view all the answers

Which equipment is necessary for handling rotary operations in the body section?

<p>Winches (B)</p> Signup and view all the answers

What type of machine is required in both the body and bogie sections for fastening?

<p>Lock bolting machine (B)</p> Signup and view all the answers

What is the minimum berthing capacity needed for ROH wagons on trestles for a depot processing 250 ROHs/month?

<p>12 wagons (D)</p> Signup and view all the answers

What is the calculated length of the ROH depot based on the working lengths of BOXN and BCN/BTPN wagons?

<p>100 m (B)</p> Signup and view all the answers

How many bogies must the bogie section supply daily for a depot handling 250 ROHs per month?

<p>20 bogies (D)</p> Signup and view all the answers

What area is suggested for adequate work stations in the cranage area for bogie repairs?

<p>2500 sq.m. (C)</p> Signup and view all the answers

Which type of welding is specifically mentioned for bogies that require extensive repairs?

<p>Down hand welding (C)</p> Signup and view all the answers

What percentage margin is accounted for heavy repairs in the berthing capacity calculation?

<p>20% (B)</p> Signup and view all the answers

What additional facilities are needed in the depot layout to support maintenance operations?

<p>Stores, machine shop, and compressor room (A)</p> Signup and view all the answers

What is the requirement for maintenance concerning modifications issued by RDSO for bogies?

<p>All modifications must be implemented (A)</p> Signup and view all the answers

Which type of section is essential in the layout to support both ROH and sick line work?

<p>Bogie and body repair section (B)</p> Signup and view all the answers

What is the typical target for ROH outturn per month in a Major depot?

<p>250 ROHs (C)</p> Signup and view all the answers

Flashcards

Stainless Steel Wagon Maintenance Facilities

Equipment and supplies needed to maintain stainless steel railway wagons in different depot locations (freight yard, sick line, ROH depot).

MIG/MAG Welding (Freight Yard)

Two MIG/MAG welding units are needed in the freight yard for maintenance of 3 rakes of wagons/day.

DC Arc Welding (Sick Line)

Two DC arc welding units are necessary in the sick line for maintaining 5 wagons each day.

Portable Air Plasma Cutting

Two portable plasma cutters are required in the freight yard for maintenance work on a daily basis.

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Welding Consumables

Necessary welding supplies and materials (electrodes and catalysts) in required quantities.

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Lock Bolts (IRS-M44)

Required lock bolts of various sizes and the associated tools for different maintenance tasks.

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Portable Grinding Machine

A portable grinding machine is necessary for smoothing and finishing stainless steel parts in the maintenance of wagons.

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ROH Depot Categories

ROH depots are categorized based on the average number of repairs-on-hand (ROH) wagons processed per month.

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ROH Depot Capacity

Super Depots handle over 500 ROH wagons/month; Mega Depots, 250-500; Major Depots, 125-250; and Minor Depots, up to 125.

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Average Depot Visits

An average air brake wagon visits an air brake depot 3 times every 18 months, once for scheduled and twice for unscheduled repairs.

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Material Handling Vehicles

Sufficient material handling vehicles and multi-utility vehicles are needed to speed up repairs.

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Yard Upkeep Contract

A long-term contract is recommended for daily yard maintenance (like scrap removal and yard cleaning).

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Communication System

Effective communication systems (like CUG phones or walkie-talkies) are needed for teams to communicate efficiently.

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Covered Shed Lighting

The covered shed should have metal halide lamps and T-5 tube lights, as well as high-intensity tower lights for illumination.

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Electric Panel Location

An electric panel with a junction box should be placed 30m between the sick yard and examination line.

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Running Contract for Repairs

Contracts for minor repairs to shed and yard floors (including electrical and civil engineering work) are recommended.

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Yard Maintenance Machinery

Essential equipment like compressors, welding plants, wagon test rigs, jacks, and trucks for train examination in yard maintenance.

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Compressor Types

Diesel and electrically powered compressors cater to air-related needs during yard maintenance.

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Tool Bag Essentials

Fitters carry basic hand tools like hammers, chisels, punches, and spanners in their tool bags for train maintenance.

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Wagon Maintenance Tools

Special tools are needed and are crucial for wheel/tire inspection, spring camber, and dimensional measurement during maintenance.

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Section Engineer Office Tools

Office-based tools for various maintenance tasks include jacks, gauges, rules, tapes, and allen keys.

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DG Set Capacity

A diesel generator (DG) set with a minimum capacity of 200 kVA is required to power tools and equipment during maintenance.

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Communication System

VHF sets and CUG phones keep supervisors connected to staff on the yard.

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Inspection Lamps

Portable LED inspection lamps are used for providing focused light during visual examinations of trains and parts.

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Transportation Utility Vehicle

A multi-utility vehicle facilitates moving personnel, tools, and materials seamlessly across a train rake or other yard/depot.

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Material Handling Truck

Lister trucks are used for transporting materials like brake blocks across the site.

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Freight Examination Yard

A section of the yard specifically designed for inspecting freight trains, separating fit from sick wagons.

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Portable Electric Grinders

Three portable electric grinders for various maintenance tasks.

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Examination Lines

Dedicated tracks (750m each) within the freight examination yard for inspecting trains.

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Jib Crane Capacity

Ten 2.5-ton capacity jib cranes for lifting and moving materials.

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Screw Air Compressor

One electric stationary screw air compressor (15 m³/min) for depot air brake systems.

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Sick Wagons

Wagons needing repair or maintenance.

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Fit Wagons

Wagons in good working order.

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Wheel Lathe

A surface wheel lathe with servo control for wheel reconditioning.

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EOT Cranes

Large cranes used for lifting wagons.

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Pressure Grease Drum

Two pressure grease drums (15t capacity) with guns for lubrication.

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Covered Sheds

Protective structures to shield tracks and yard from weather elements.

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Granolithic Concrete Flooring

High-resistance flooring used to allow easy movement of equipment and materials on inspection tracks

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Rail/Road Shunting Vehicle

A vehicle for moving/positioning railway wagons.

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Personal Digital Assistant (PDA)

A device used to record inspection defects and data, speeding up the work process.

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Industrial type PDA's

Pre-programmed handheld device with pre-set checklists, streamlining the inspections

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MIG/MAG Welding Units (Freight Yard)

Two MIG/MAG welding units are needed in the freight yard to maintain three train rakes daily.

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Portable Air Plasma Cutting Machine

Two portable plasma cutters are needed for cutting stainless steel in the freight yard, sick line and ROH depot.

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Lock Bolts (Various Sizes)

Specific lock bolts and associated tools are needed for different maintenance tasks, particularly for the IRS-M44 wagon type.

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Portable Grinding Machine

Three portable grinding machines are necessary for smoothing and finishing metal parts in wagon maintenance.

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ROH Depot MIG/MAG Welding Units

Three sets of MIG/MAG welding units are needed in the ROH depot (focus on monthly wagon maintenance)

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Sick Line DC Arc Welding (Units)

Two DC arc welding units are required in the sick line for daily wagon repairs.

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Welding Electrodes (Consumables)

Welding electrodes (consumables) are needed as per requirement for various stainless steel and other materials combinations as per the maintenance standards.

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Yard Maintenance Machinery

Essential equipment like compressors, welding plants, wagon test rigs, jacks, and trucks for train examination in yard maintenance.

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Compressor Types

Diesel and electrically powered compressors cater to air-related needs during yard maintenance.

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Tool Bag Essentials

Fitters carry basic hand tools like hammers, chisels, punches, and spanners in their tool bags for train maintenance.

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Wagon Maintenance Tools

Special tools are needed and crucial for wheel/tire inspection, spring camber, and dimensional measurement during maintenance.

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Section Engineer Office Tools

Office-based tools for various maintenance tasks include jacks, gauges, rules, tapes, and allen keys.

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DG Set Capacity

A diesel generator (DG) set with a minimum capacity of 200 kVA is required to power tools and equipment during maintenance.

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Communication System

VHF sets and CUG phones keep supervisors connected to staff on the yard.

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Inspection Lamps

Portable LED inspection lamps are used for providing focused light during visual examinations of trains and parts.

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Sick Wagons

Wagons needing repair or maintenance.

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EOT Cranes

Electric overhead travelling cranes used for lifting and moving heavy objects, such as wagons.

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Television/DVD player

A set of television and DVD player equipment.

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Hostel Kitchen Equipment

Kitchen items needed for a hostel.

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Welding Machines

Used to weld different materials, essential for wagon repairs.

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Body Section

A part of a train depot responsible for wagon body maintenance.

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LCD Projector

A device for projecting images onto a screen.

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Bogie Section

A depot section focusing on maintaining wagon bogies (the wheels and frame).

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Water Cooler Quantity

The number of water coolers required.

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Gas Cutting Equipment

Tools for cutting metal with gas.

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Hydraulic Riveter

Tool for fastening metal parts using hydraulic pressure. Used in body/bogie repair.

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ROH Depot

Railway depot that handles repairs on hand (ROH) wagons.

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Maintenance Machinery (M&P)

The necessary machinery and plants for maintaining wagons at railway depots.

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Depot Layout

The physical arrangement of facilities inside a railway depot.

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Quantity of M&P

The number of each type of machine or plant required in a depot.This depends on the number of wagons being maintained.

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Material Handling Equipment

Equipment used to move materials in a depot (wagons, parts, etc) to ensure efficient repairs.

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ROH Depot Size (100m)

The length of the ROH depot, calculated considering wagon lengths and a 20% margin for large repairs, is 100 meters.

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Bogie Repair Workstations

2500 sq.m. of cranage area is needed for bogie repairs, including tasks like welding and rebuilding wearing surfaces, to support 250 ROHs per month.

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Daily Wagon Release Rate

The depot needs to release approximately 25-30 wagons per day for effective repair operations.

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ROH Wagon Berthing Capacity

The ROH depot needs a berthing capacity of 12 trestles, allowing for a 20% buffer for additional repairs.

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Bogie Supply for Repairs

The bogie section must provide 20 bogies each day to handle 250 ROHs per month, in addition to repairs outside the regular schedule.

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24-Hour ROH Turnaround

The schedule for repairing and releasing ROH wagons must be completed within 24 hours, including both placement and removal time.

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Wagon lifting for Repairs

The depot must also be prepared to handle 500 wagons for out-of-course repairs.

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EOT Cranes

EOT (electric overhead traveling) cranes are required for handling wagons, with various sizes (15t/5t & 10t/3t) for different lifting needs.

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Wheel Lathe Location

A dedicated wheel lathe area is part of the bogie repair section layout, essential for maintaining, repairing, and reconditioning wheels.

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Depot Support Facilities

Essential support facilities like stores, workshops, air brake sections, model rooms, canteens, and hostels are needed for smooth depot operations but dependent on existing layouts.

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Study Notes

Infrastructure Facilities for Freight Yards, Sick Lines, and ROH Depots

  • Introduction: Proper maintenance of freight stock is crucial for optimal performance. Infrastructure availability directly impacts maintenance effectiveness.
  • Examination/Repair Facility Categorization (Intensive Examination Points):
    • Category A: Pucca pathways on more than 50% of designated lines, 150 lux illumination, sufficient material handling and welding facilities.
    • Category B: Similar to A, with adequate illumination, material handling, and welding facilities, impacting more than 50% of lines.
    • Category C: Pucca pathways on over 50% of nominated lines; sufficient illumination and material handling are present.
    • Category D: Pucca pathways are not present but other facilities are available.
    • Category E: No facilities available.
  • ROH Depots Criteria:
    • Category A: All infrastructural facilities are sufficient.
    • Category B: Essential facilities are available, but some may not meet target output requirements.
    • Category C: All but some vital facilities (like EOT crane/wheel turning lathe) are adequate.
    • Category D: Facilities are inadequate or nonexistent.
  • Sicklines:
    • Criteria: Berthing capacity (covered shed), heavy-duty concrete flooring, availability of welding, compressor/exhauster facilities. Categories are similar to the standards for intensive examination points.
  • Infrastructure & Facilities Required in the Yard:
    • Minimum center-to-center distance between tracks is 7.5 meters.
    • Concrete pathways for smooth material and personnel movement.
    • Proper lighting for wagon inspection.
    • Welding grids for efficient wagon repairs.
    • Outlets for air pressure testing.
    • Duty rooms, staff rooms, storerooms, etc., with essential equipment and machinery (compressors, welding machines, etc.).
    • Communication systems (VHF sets, CUG phones) for proper coordination.
    • Inspection lamps (portable LED).
  • Machinery & Plant Items: Essential for examination: Diesel & electric compressors, welders, wagon/rake test rigs.

Infrastructural Facilities for Freight Examination Yard (IF PROPOSED)

  • Yard Design: Includes examination lines (750m each) for keeping sick and fit wagons, complete with abrasion-resistant flooring and ballast-free track construction, and 7.5m center-to-center distances.
  • Examination Line Enhancements:
    • Dedicated lines with proper layout for handling rakes.
    • Additional crane and vehicle support facilities.
    • Sufficient wiring for equipment and staff safety.
  • Overall Yard Improvement:
    • A major focus on repair and maintenance facilities.
    • Comprehensive contracts for yard upkeep to manage scrap and minor maintenance work.
  • EOT Crane Capacity & Maintenance: Includes EOT cranes (30-tonne capacity), slings (for lifting wagons), material handling vehicles.
  • Yard Accessibility Enhancements: Multi-utility vehicles for material transport. Covered shed with alternate light sources.
  • Comprehensive Contracts: For major maintenance tasks and upkeep of yard facilities (e.g. sheds, floors). This includes M&P (major machinery and plant) maintenance of EOT cranes, compressors, welding, hydraulic jacks.

Infrastructural Facilities in Air Brake ROH Depots

  • Depot Categorization: Super, Mega, Major, and Minor Depots are categorized based on targeted monthly ROH output capacity.
  • Layout Recommendation (for 250 ROHs/month): This includes a focus on berthing capacity for ROH wagons, handling capacity, and layout of bogie (repair) and body repair sections.

Minimum Infrastructure for Premium & CC Examinations

  • Dedicated Examination Lines: Two or more examination lines with pathways are essential for quick, efficient processing.
  • Paths/Walkways: Paved walkways (2 meters wide) are critical for easy movement within the examination area.
  • Welding Facilities: Portable welding sets with adequate illumination and power are necessary.

Facilities Required in Freight Examination Yards

  • Examination Lines: Dedicated lines for premium/CC examination, accommodating the number of rakes under examination.
  • Pathways: Well-maintained paths and walkways for personnel and equipment movement.
  • Illumination: High masts/tower lights for general illumination, lamp posts along pathways for specific tasks.
  • Welding Transformer Room: For welding work.
  • Air Compressor: Maintaining suitable capacity is crucial.
  • Tooling/Sub-storerooms: Proper storage and maintenance areas for all materials required in the maintenance work.

Facilities Required for Maintenance of Stainless Steel Wagons

  • Welding Equipment: MIG/MAG and DC Arc welding sets of specific capacities for different tasks.
  • Cutting Equipment: Portable air plasma cutting machines.
  • Consumables: Various welding electrodes for different types of steel, along with other materials.
  • Lock Bolts/Equipment: For securement and maintenance.
  • Grinding/Polishing Machines: Tools for grinding/polishing/cleaning required materials and surfaces.
  • Other Accessories: Stainless-steel wire brushes, plates, and CRF sections (for maintenance).

Minimum Infrastructure

  • Premium/CC Examination Facilities: Detailed aspects for successful premium/CC examinations, including staff, material handling, and facility infrastructure (such as paths/walkways, portable welding sets).

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Related Documents

CnW Maintenance Manual - Infrastructural Facilities PDF

Description

This quiz explores the infrastructure requirements and categories for freight yards, sick lines, and ROH depots. Understanding the maintenance facilities' standards is crucial for efficient operations. Test your knowledge on the various categories and their specific criteria.

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