Indian Railways Safety Rules

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Questions and Answers

What type of fire requires CO2 to be extinguished?

D Class

C Class (correct)

B Class

A Class

Why should water not be used to extinguish electrical fires?

It is not effective in extinguishing electrical fires (correct)

It may cause an explosion

It may damage the electrical equipment

It may cause the fire to spread

What type of fire extinguisher should be provided in electrical installations?

Foam type

Dry powder type

Gas type (correct)

Water type

Why should buckets filled with sand or water be hung at a convenient place?

To put out fires quickly in emergency situations Signup and view all the answers

What should be prohibited in petrol/Diesel storage rooms and battery rooms?

Smoking Signup and view all the answers

What should not be stored near equipment?

Oil and paints Signup and view all the answers

Why should petrol storage rooms not have sparking equipment?

To prevent fires Signup and view all the answers

What should be ensured for basic fire fighting equipment?

That they are in good condition and the expiry date is clearly mentioned Signup and view all the answers

What should be done while inserting a plug into a socket device?

The earth contact should make its circuit before the live contacts engage Signup and view all the answers

Why should the output terminals be earthed before handling the mains?

To prevent any residual electrical charge from causing a shock Signup and view all the answers

What should be done to capacitors after their source of potential has been switched off or disconnected?

Their live terminations should have a discharge path applied Signup and view all the answers

What should be done to capacitors wired permanently across the mains supply?

They should be shunted by a resistance Signup and view all the answers

Why should breaking of energised radio frequency output circuits be avoided?

To prevent electrical shock Signup and view all the answers

What should be ensured while energising a radio transmitter?

That no one is at work on the equipment or aerial system Signup and view all the answers

Why should tall metallic structures be earthed?

To protect them from lightning strikes Signup and view all the answers

Why should disconnection of equipment from the mains supply be checked once again before commencing work?

To ensure the disconnection is complete and safe Signup and view all the answers

What is the maximum permissible resistance of earthing for the metallic body and supporting frame of equipment?

10 ohms Signup and view all the answers

Why is it important to avoid simultaneous human contact with metallic bodies connected to different earths?

To prevent electrical shocks Signup and view all the answers

What is the purpose of the iron screening around equipment within 2 meters of the 25KV live contact wire?

To protect against electrical shock Signup and view all the answers

What is the recommended practice when working on telecommunication circuits along the 25 KV ac line?

Wear rubber gloves and use tools with insulated handles Signup and view all the answers

Why is it necessary to establish an electrical connection of low ohmic resistance between the armour and sheathing of a cable before cutting?

To prevent electrical shock Signup and view all the answers

What is the purpose of earthing the iron screen around equipment within 2 meters of the 25KV live contact wire?

To protect against electrical shock Signup and view all the answers

Why is it necessary to take special precautions when working on telecommunication circuits along the 25 KV ac line?

To prevent electrical shock Signup and view all the answers

What is the recommended practice when the work to be done on telecommunication circuits along the 25 KV ac line is meticulous and rubber gloves cannot be used?

Split the circuit into sections by earthing them Signup and view all the answers

What should be done to the safety devices when they have operated under fault conditions?

They should be checked for their correct functioning before resetting Signup and view all the answers

Who should give approval for altering or disconnecting safety devices?

The competent authority Signup and view all the answers

Why is it essential for staff to be familiar with artificial respiration?

Because electrical shock can result in the interruption of natural breathing Signup and view all the answers

Where should charts explaining artificial respiration methods be exhibited?

In a prominent place where high voltages are in use Signup and view all the answers

Where should acid be kept?

In a cool dry place Signup and view all the answers

What should be added to acid when dilution is needed?

Acid should be added to water Signup and view all the answers

What should be worn when handling acid containers?

Suitable rubber gloves Signup and view all the answers

What should be avoided in a battery room?

Breaking of the connection in a circuit carrying current Signup and view all the answers

What should be done with the switch when working on a live circuit?

It shall be locked in the open position and the key retained by the person in charge of the work Signup and view all the answers

At what voltage peak is it recommended to avoid working on live circuits?

150V Signup and view all the answers

What is one of the protective measures to be taken while working on live parts?

Removing loose clothes and metallic personal accessories Signup and view all the answers

What is the purpose of providing rubber floor mats near electrical distribution boards used in battery rooms?

To prevent electrical shock by providing insulation from earth Signup and view all the answers

Why should suitable protective guards and wire nets be provided?

To prevent accidental contact with high voltages Signup and view all the answers

What should be done with covers used for protection against accidental contact with high voltages?

They should be kept closed and opened only for maintenance or repair by authorised staff Signup and view all the answers

Why should insulated current carrying parts in the equipment be located in a certain manner?

To prevent them from being subjected to abrasion or mechanical damage Signup and view all the answers

What should be provided when cables pass through metallic parts?

Insulating bushings Signup and view all the answers

Which of the following tools must be insulated when working in a 25 KV AC area?

Screwdriver Signup and view all the answers

What is the primary purpose of providing insulating sleeves on tools?

To protect staff from AC induced voltages Signup and view all the answers

Why should personnel be kept away from the danger zone when handling materials by crane or hoist?

To reduce the risk of injury or accidents Signup and view all the answers

What should be taught to staff who are not properly handling tools?

The correct method of tool handling Signup and view all the answers

What should be complied with in factories?

Regulations of the Factories Act Signup and view all the answers

Why is it essential to check the working condition of lightning arresters and fuses before commencing work?

To reduce the risk of injury or accidents Signup and view all the answers

What is the purpose of providing insulating sheath on tool handles?

To prevent electrical shocks Signup and view all the answers

What should be done before commencing work on telecommunication equipment installed on overhead equipment switching posts?

Verify the working condition of lightning arresters and fuses Signup and view all the answers

What is the recommended practice when working on live circuits with voltages over 150V peak?

Avoid working on live circuits with voltages over 150V peak unless specially trained Signup and view all the answers

What is one of the protective measures to be taken while working on live parts?

Provision of ample light for illumination Signup and view all the answers

What is the purpose of providing rubber floor mats near electrical distribution boards used in battery rooms?

To provide insulation from earth Signup and view all the answers

Why should suitable protective guards and wire nets be provided?

To prevent staff from making accidental contact with high voltage and radio frequency high power radiation Signup and view all the answers

What should be done with covers used for protection against accidental contact with high voltages?

Keep them closed and opened for maintenance or repair only by authorised staff Signup and view all the answers

Why should insulated current carrying parts in the equipment be located in a certain manner?

To prevent them from being subjected to abrasion or mechanical damage Signup and view all the answers

What should be provided when cables pass through metallic parts?

Insulating bushings Signup and view all the answers

What should be done to switch locking facilities if they are available?

Lock it in the open position and retain the key Signup and view all the answers

When removing fuses, what should be used to extract knife or cartridge type of fuses from their holders?

Non-conductive fuse extractor Signup and view all the answers

What should be done when working on non-closed type of circuit breakers?

Wear safety goggles Signup and view all the answers

What should be provided on switches and cut-outs in electrical installations?

Suitable labels Signup and view all the answers

Why should vaporising liquid extinguishers not be used in confined places?

They may cause physiological effects Signup and view all the answers

What should be done when handling circuit breakers?

Keep the face away from the circuit breaker Signup and view all the answers

Why should sign boards be hung in areas with high voltage or radio frequency voltage?

To provide warning and danger signs Signup and view all the answers

What should be done with fuses after they have been removed or replaced?

Replace the fuse with one of the correct rated fuses Signup and view all the answers

What should be done when multiple repair parties are working on electrical equipment?

Each party should provide a separate label Signup and view all the answers

What is the primary risk when working close to a live conductor?

Direct contact with the live conductor Signup and view all the answers

Why should steel measuring tapes or long metallic wires be avoided in electrified tracks?

To prevent electrical shock from induced voltage Signup and view all the answers

What should be done to ensure continuity of rails during maintenance or renewal of tracks?

Use temporary jumpers to bridge the gap Signup and view all the answers

Why should no work be done within a distance of 2 meters from the live parts of the overhead equipment without a permit to work?

To ensure the worker's safety from direct contact with live parts Signup and view all the answers

What should be done to fallen wires or wires at a level crossing?

Switch off the power and earth the wires Signup and view all the answers

Why should the use of rails as a footpath, seat, or for other purposes be strictly prohibited?

To prevent electrical shock from the rails Signup and view all the answers

What should be avoided when working near overhead equipment?

Using steel measuring tapes or long metallic wires Signup and view all the answers

What should be done to ensure the safety of workers near electrified tracks?

All of the above Signup and view all the answers

What should be ensured while testing transmitters with voltage tests?

The test leads are insulated from the ground Signup and view all the answers

What is the requirement for safety belts provided for staff working on poles or masts?

They should be made of good quality, non-fibrous leather and at least 7.5 cm wide Signup and view all the answers

Why are rubber gloves prohibited in certain situations?

They are prohibited when working on radio frequency circuits Signup and view all the answers

What is the purpose of providing helmets for staff?

To protect from falling objects Signup and view all the answers

What is the importance of insulating tools in a wireless station?

To prevent electrical shocks Signup and view all the answers

What should be provided for staff working on tracks with 25 KV ac overhead equipment?

Instructions for precautionary measures Signup and view all the answers

What should be ensured while working on telecommunication circuits along the 25 KV ac line?

That special precautions are taken Signup and view all the answers

Why is it necessary to provide suitable rubber gloves for staff?

To prevent electrical shocks Signup and view all the answers

Study Notes

Checking under Fault Conditions

Checking should be carried out on protective and safety devices for correct functioning before resetting them for use after they have operated under fault conditions.

Altering and Disconnecting Safety Devices

Safety devices should not be altered or disconnected without specific approval of the competent authority, except for replacements.

First Aid

Staff should be familiar with methods of artificial respiration to handle electrical shock cases.
Charts explaining artificial respiration methods should be displayed in prominent places where high voltages are in use.
Names of staff trained in first aid should be displayed.

First Aid Box

First aid boxes should be kept in major telecom installations with more than 6 staff.

Battery Rooms

Battery rooms should have good ventilation and acid-proof tiles on floors where acid is handled.
Floors should be kept dry and free from fallen acid.

Storage of Acid

Acid should be stored in a cool, dry place.

Diluting the Acid

Acid should always be added to water when dilution is needed.
A board with the legend "DO NOT ADD WATER TO ACID" and a pictorial representation should be hung in a suitable place.
Suitable rubber gloves should be used when handling acid containers.

Safe Working in Battery Rooms

Breaking of connections in circuits carrying current or lighting naked flames in battery rooms should be avoided.
Roofs of buildings should be kept clear of leaves or combustible materials.
Smoking should be prohibited in petrol/diesel storage rooms and battery rooms.
"No Smoking" signs with a cigarette and red cross should be displayed.
Oil, paints, etc. should not be stored near equipment.
Petrol storage rooms should not have sparking equipment emitting sparks like buzzers, relays, fuses, etc.
Handling petrol such as filling engine tanks should not be done while medium and high power transmitters are radiating in close proximity.
Lighting of fire for cooking, etc. within compound walls should be strictly prohibited.
Buckets filled with sand or water should be hung at a convenient place.

Fire Extinguishers

Different types of fires require different extinguishing methods:
- Class A: water for wood, charcoal, jute, cloth, etc.
- Class B: foam for oil, petrol, grease, paints, etc.
- Class C: CO2 for electrical fires; water should not be used.
Basic fire-fighting equipment should be kept in places with fire risk and should be in good condition.
Expiry dates should be clearly mentioned on fire extinguishers.
Notices of instructions for using fire-fighting equipment should be provided.
Provision for refilling fire extinguishers should be ensured.
Gas-type fire extinguishers should be provided in all electrical installations.
Water should not be used to extinguish electrical fires.

Working on Live Circuits

Work on live circuits with voltages over 150V peak should be avoided unless specially trained.
Protective measures while working on live parts include:
- Provision of ample light for illumination.
- Removal of loose clothes and metallic personal accessories.
- Provision of insulation from earth using rubber floor mats near electrical distribution boards used in battery rooms.
- Use of only one hand where practicable, keeping the other hand free.
- Avoid using wet cloth, wet hands, and naked wires while working in live circuits.

Safety Guards and Covers

Protective guards and wire nets should be provided to prevent accidental contact with dangerous voltage and radio frequency high power radiation.
All covers used for protection against accidental contact with high voltages should normally be kept closed and opened for maintenance or repair only by authorized staff.

Safety Design and Installation Practices

Insulated current-carrying parts in equipment should be located to avoid abrasion or mechanical damage.
Insulating bushings should be provided where cables pass through metallic parts.
Equipment or components connected by plug and socket devices should ensure earth contact makes its circuit before current-carrying contacts engage.
All tall metallic structures should be suitably earthed strictly.

Handling Electrical Equipment

Disconnection of equipment from mains supply should be done with the operation of switches as well as removal of fuses.
Disconnection should be checked before commencing work on the equipment.
Output terminals should be earthed before handling mains to ensure rapid discharge of capacitors.

Handling Radio Equipment

Breaking of energized radio frequency output circuits should be avoided.
Before energizing a radio transmitter, ensure no one is working on the equipment or aerial system, no tools or testing equipment are left in or on the equipment, and all testing apparatuses are removed.
Metallic body and supporting frame of equipment should be earthed with a resistance not exceeding 10 ohms.
Ensure no simultaneous human contact with metallic bodies connected to different earth.
Equipment and portion thereof including the supporting structure falling within 2 meters of the 25KV live contact wire or metal part electrically connected to this conductor should be protected by an iron screening of approved design, solidly connected to the structural work.

Safety Precautions in Railway Telecom Maintenance

Working on Live Circuits

Avoid working on live circuits with voltages over 150V peak unless specially trained
Take protective measures while working on live parts:
- Provide ample light for illumination
- Remove loose clothes and metallic personal accessories
- Ensure insulation from earth (e.g., use rubber floor mats near electrical distribution boards in battery rooms)
- Use one hand where practicable, keeping the other hand free
- Avoid using wet cloth, wet hand, and naked wire while working in live circuits

Safety Guards and Covers

Provide suitable protective guards and wire nets to prevent accidental contact with dangerous voltage and radio frequency high-power radiation
Keep covers used for protecting against accidental contact with high voltages normally closed and opened only for maintenance or repair by authorized staff

Safety Design and Installation Practices

Locate insulated current-carrying parts in equipment to avoid abrasion or mechanical damage
Use insulating bushings where cables pass through metallic parts
Avoid using vaporizing liquid extinguishers in confined places with poor ventilation, as they can be poisonous and cause harmful physiological effects

Precautions during Fire

Give an alarm in accordance with local regulations
Stop all forced air-cooling devices
Disconnect equipment involved immediately at the supply source
Prevent the spread of fire
Cover the nose and mouth with a wet cloth to protect oneself from smoke inhalation

Handling Circuit Breakers and Fuses

Use a non-conductive fuse extractor to remove knife or cartridge-type fuses from their holders
Replace fuses with correct-rated fuses
Keep the face turned away from the circuit breaker while closing manually operated circuit breakers
Use safety goggles when working on non-closed type circuit breakers

Provision of Labels

Secure switches and cut-outs in open position and provide suitable labels
Hang signboards warning of danger with legends in appropriate languages at suitable places
Use labels when working on live circuits, and remove them only after completion of the work

Handling Materials and Tools

Handle materials and tools with care to avoid injury
Teach correct handling methods to staff to prevent injuries
Use cranes or hoists to handle materials, and ensure personnel are away from the danger zone
Use insulating sleeves for tools used in 25 KV AC areas

Voltage Handling of Tools

Insulate meters from the ground when making voltage tests on transmitters
Use test leads that can withstand high voltages

Gloves, Belts, and Helmets

Use rubber gloves when working with high voltages, but avoid using them on radio frequency circuits
Design gloves to prevent slipping off during use and to be easy to remove
Use safety belts of approved design when working on poles or masts, made of 5 mm thick, non-fibrous leather, and at least 7.5 cm wide
Use helmets of approved design for staff working in areas where small objects may fall from above

Additional Precautions for 25 KV AC Traction Overhead Equipment

Take precautions to avoid direct contact with live conductors and pressure of return current in rails
Avoid working within 2 meters of live parts of overhead equipment without a permit to work
Do not touch fallen wires unless power is switched off and the wire is suitably earthed
Maintain continuity of rails serving electrified tracks by providing temporary metallic jumpers of approved design
Prohibit using rails as footpaths, seats, or for other purposes
Avoid using steel measuring tapes or long metallic wires in electrified tracks

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Description

This quiz covers safety rules and regulations of Indian Railways, including checks under fault conditions and first aid procedures.