OHE Maintenance and Supervisor Responsibilities

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Questions and Answers

What is the main responsibility of the supervisor regarding OHE inspections?

Inspect only when defects are reported

Cover the entire section once every three months (correct)

Supervise only when maintenance is scheduled

Conduct inspections once a year

Which of the following actions must a supervisor take if defects are reported?

Wait for the next inspection to address them

Ignore them if they are minor

Only report them to his superior officers

Scrutinize the reports and arrange prompt rectification (correct)

How often should a supervisor's section gangs be checked for quality work?

Only during emergencies

Weekly

Periodically, as per prescribed schedules (correct)

Bi-weekly

What should a supervisor do regarding training for his staff?

Instruct staff in maintenance methods with a focus on safety Signup and view all the answers

What is necessary for the maintenance of OHE tools and equipment?

They must be properly cared for and maintained Signup and view all the answers

In case of a breakdown, what is the responsibility of the supervisor?

Ensure the organization is ready to act promptly Signup and view all the answers

How should a supervisor handle spare parts and maintenance stores?

Monitor availability and take timely action to recoup stocks Signup and view all the answers

What is strictly forbidden when making joints in a conductor?

Reducing the useful cross section of a conductor Signup and view all the answers

What should be done to the transformer before starting any work on it?

It should be earthed after opening isolating fuse switches Signup and view all the answers

When can work on overhead lines running parallel to electrified tracks be performed without switching off power from the 25 kV traction line?

For replacement of lamps below the line Signup and view all the answers

What is the minimum tensile strength requirement for temporary anchoring of conductors?

It should be at least equal to that of the cable being anchored Signup and view all the answers

What should be maintained in proper condition regarding structure bonds?

The connections of structures to the ground Signup and view all the answers

What should be done with the removed fittings after replacing 100 percent OHE fittings in tunnels?

Take them to the Workshop for detailed examination Signup and view all the answers

During the inspection of wires for overhead cross-feeders, which issues should be specifically checked?

Frayed strands, overheating, pinching, or corrosion Signup and view all the answers

What should be done to ensure proper maintenance of insulators during inspections?

Clean them while the attachments are dismantled Signup and view all the answers

What action should be taken for fittings that do not provide the prescribed margin of adjustment during POH?

They should be replaced Signup and view all the answers

What should be done before tightening PG clamps during inspection?

Ensure all joints are coated with vaseline Signup and view all the answers

What is the recommended approach if a major OHE breakdown occurs?

Examine the bracket assemblies in about 8 to 10 spans Signup and view all the answers

What should be inspected regarding aluminum bronze fittings during workshop maintenance?

Threads and condition of fittings with a magnifying glass Signup and view all the answers

What action should be taken if G.I. fittings show signs of deterioration during inspections?

Repair with cold galvanizing paint if minor chipping is present Signup and view all the answers

What is the first action to take when checking turnouts?

Inspect the contact wires relative to track compliance with SED Signup and view all the answers

During maintenance, how should rubber washers/rings be treated?

Replaced where necessary after cleaning Signup and view all the answers

What should be done when the guide pulley is damaged?

The entire equipment should be replaced with a spare one. Signup and view all the answers

Which of the following defects can lead to obstruction of the movable pulley?

Damage to neoprene washers Signup and view all the answers

How often should regulating equipment be overhauled?

Every two years. Signup and view all the answers

What is the purpose of the stop nuts on the guide rods?

To stop the movable pulley from coming off in case of rope breakage. Signup and view all the answers

What should be used to check the integrity of stainless steel ropes?

A magnifying glass. Signup and view all the answers

What temperature can the approved grease withstand without drying?

60 degrees C. Signup and view all the answers

What is an indicator that the regulating equipment needs to be overhauled?

If visible movement of the counter weight requires more than 10 kgf. Signup and view all the answers

What defect is NOT manageable in-situ?

Replacing guide pulley. Signup and view all the answers

What is affected by the shape and dimensions of the winch frame arms?

Angle of incidence of the stainless steel wire rope. Signup and view all the answers

What is the maximum speed allowed for the OHE Inspection Car when checking contact wire level and stagger?

10 km/h Signup and view all the answers

What should be done to the pantograph before starting any operation for checking OHE?

Check the cable connection Signup and view all the answers

Who is responsible for ensuring the safety of the section before someone goes up on the roof of the OHE Inspection Car?

An authorized person not lower than a linesman Signup and view all the answers

Under what condition can the OHE inspection car operate with the pantograph raised?

With the section live Signup and view all the answers

What is the procedure for the OHE Inspection Car when approaching turnouts and cross overs?

Stop and ensure the section ahead is dead and earthed Signup and view all the answers

What should be done to the pantograph when not in use?

Fully lowered and clamped securely Signup and view all the answers

How many OHE staff need to be trained to drive the OHE Inspection Car in emergencies?

At least two Signup and view all the answers

Which condition is NOT allowed for the operation of the OHE Inspection Car?

Working with the pantograph raised without earthing Signup and view all the answers

What should be used instead of strings or cords to clamp the pantograph securely?

Metal clamps Signup and view all the answers

What is prohibited when driving the OHE Inspection Car for checking operations?

Riding on the clutch Signup and view all the answers

What is the primary responsibility of a linesman during patrol work on OHE?

To identify and report common types of defects Signup and view all the answers

Which method is recommended to check if OHE masts are out of plumb?

Employing a plumb bob Signup and view all the answers

What is a critical action linesmen should take if they notice erosion near OHE masts?

Report to the Engineering Department for intervention Signup and view all the answers

Which approach is essential for maintaining traction assets in service?

Minimizing outages without compromising safety Signup and view all the answers

During the assessment of masts, what should be measured to determine their deflection?

At a height of 1.85 m multiplied by three Signup and view all the answers

What should linesmen develop the ability to do in the event of OHE breakdowns?

Carry out temporary repairs to restore traffic quickly Signup and view all the answers

What should be taken into account while defining the preventive maintenance schedule?

Recommendations of Original Equipment Manufacturer and guidelines issued by relevant authorities Signup and view all the answers

What is the purpose of utilizing a ratchet screw adjustment on a micrometer when measuring contact wire thickness?

To ensure uniform pressure between the jaws Signup and view all the answers

How should the location for measuring contact wire thickness be identified for consistency in future measurements?

By painting a 75 mm wide band with black paint Signup and view all the answers

What action must be taken if the contact wire reaches the condemning limit of thickness?

Introduction of a splice at the point Signup and view all the answers

What is the maximum number of splices allowed in one tension length according to the given standards?

15 splices Signup and view all the answers

Which material is commonly used for the main components of splice fittings in OHE equipment?

Aluminum bronze Signup and view all the answers

What testing must samples of splice fittings undergo in addition to normal quality tests?

Special tensile tests Signup and view all the answers

What is the minimum distance a splice should be located from a support in the direction of traffic?

5 m Signup and view all the answers

In new constructions, what is the general rule regarding splice usage?

No splices shall be provided Signup and view all the answers

What is the preferred distance between adjacent splices according to guidelines?

100 m Signup and view all the answers

What should be done if more than two sheds are broken on an insulator?

Replace the insulator Signup and view all the answers

Which step is required when checking the condition of droppers?

Tighten bolts wherever required Signup and view all the answers

What is the maximum stagger allowed at the turn cuts for Overhead Equipment (OHE)?

300 mm Signup and view all the answers

What should be done with galvanized pipes that show chipped galvanization?

Replace the fitting with a new one Signup and view all the answers

What action is necessary for muffs that are cracked or damaged?

Recast the muffs Signup and view all the answers

During inspections, what should be checked regarding the contact and catenary wires?

They should be free of kinks and twists Signup and view all the answers

What should be done if PG clamps and jumpers show signs of wear?

Open the clamps and check condition properly Signup and view all the answers

What is required for the inspection of caution notice boards and number plates?

Verify they are well secured and painted as required Signup and view all the answers

What action should be taken if components in cantilever assemblies show signs of overheating?

They should be checked for proper tightening and alignment. Signup and view all the answers

What should be done if any stranded conductor has more than 20% of its strands broken?

Splice the conductor Signup and view all the answers

When checking the heights and staggers, what is essential regarding coordination?

Co-ordinate with Permanent Way Inspectors Signup and view all the answers

During the maintenance of contact wires, which tool should be avoided for cleaning grooves?

File Signup and view all the answers

What is the key consideration when checking the position of the contact wire relative to tracks?

It must comply with the specified SEDS. Signup and view all the answers

What is the purpose of the maintenance charts that may be prepared in different colors?

To visualize the progress and schedule of maintenance tasks. Signup and view all the answers

All regulating equipment must be replaced with what type of equipment?

Previously overhauled ones. Signup and view all the answers

When performing POH, what should be done with the brackets of cantilever assemblies in relation to the mast axis?

Their position must be checked against the mast's axis for temperature variations. Signup and view all the answers

What should be ensured regarding the insulators of anchoring wires during inspections?

They need to cross the plane of OHE as per plan. Signup and view all the answers

What is the recommended action if kinks are observed in the conductors during maintenance?

They must be removed to avoid risk of damage. Signup and view all the answers

Which of the following practices is NOT recommended when dismantling jumper connections?

Applying excessive force to remove connections. Signup and view all the answers

How should detailed examinations of various components in cantilever assemblies be conducted?

After thorough cleaning and dismantling. Signup and view all the answers

What should be monitored closely on the stainless steel rope during inspection?

End fittings for damage Signup and view all the answers

During patrols of overhead lines, what indication suggests a serious structural issue?

Settled soil over foundation ground level Signup and view all the answers

Which factor does NOT influence the frequency of patrolling overhead lines?

Age of the overhead lines Signup and view all the answers

What should be done to the overhead line structures if protective coatings have disappeared?

Apply new protective coatings Signup and view all the answers

What is the first action taken if defects are noted during overhead line inspections?

Immediately notify the maintenance team Signup and view all the answers

Study Notes

Chapter III - Overhead Equipment

Divided into five sections: Organization, Guiding Notes on Maintenance, Maintenance Schedules for OHE, Safety Rules for OHE, and Forms and Registers.
Section I: Describes the duties of three staff categories in OHE, including the Chief Traction Foreman (CTFO) and Traction Foremen (TFOs). CTFO controls all activities while TFOs manage functional activities.
Section II: Outlines important maintenance points for OHE components.
Section III: Provides a recommended maintenance schedule for OHE.
Section IV: Presents the essential safety rules for OHE staff.
Section V: Details the records and forms for OHE maintenance.
Appendices include documents on layout plans, bonding, regulations for power line crossings, maintenance depots, and specifications for equipment and materials for railway electric traction.

Organization

Chief Traction Foreman (CTFO) is the senior supervisor in charge of OHE maintenance, including 25kV feeders and return feeders.
CTFO is responsible for proper installation maintenance of OHE and for staff training.
Field Supervisors (ATFO, chargeman, inspector) are responsible for OHE and allied installation maintenance following schedules in their jurisdictions, manage power block requirements, and detailed inspections.

Duties of Field Supervisors

Maintain OHE and allied installations.
Coordinate with permanent way maintenance for power block requirements.
Conduct detailed OHE inspections according to procedures.
Supervise maintenance gangs.
Handle breakdowns promptly.
Provide training to staff.
Maintain tools and equipment.
Ensure proper stores management
Report to superiors and provide updates.

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Description

This quiz focuses on the responsibilities of supervisors regarding Overhead Equipment (OHE) inspections and maintenance. It covers essential procedures for addressing defects, training staff, managing tools, and ensuring safety standards. Test your knowledge on best practices and regulations related to OHE operations.