2 Railway Employee

Does IR operate diesel-electric or diesel-hydraulic multiple units of any kind?

09-07-2019

There are several diesel-electric multiple units (DEMUs) and diesel-hydraulic multiple units (DHMUs) in operation. Most are made by ICF. The BG DEMUs have a Cummins VTA 1710 V-12 prime mover of 705 HP, whereas the BG DHMUs have two 350hp underfloor engines (Cummins 855R) driving two separate Voith hydraulic transmissions via propeller shafts and differentials. These have a rated maximum speed of about 105km/h. The first units were introduced in 1993-94. A newer variant of the DEMU from ICF has been spotted on the Ahmedabad - Abu Road section with two underslung Cummins NT 855R engines each driving a traction alternator whose output is fed to 4 traction motors. A new aerodynamically

What is the ‘Raksha Dhaga’? What other methods does IR use to warn of landslides and rockfalls?

July 19, 2019

'Raksha Dhaga' or literally, 'Safety Thread', is a device pioneered by Konkan Railways in landslide-prone areas. It consists of a wire attached to sensors which can be tripped when the wire is moved excessively or snapped by a falling rock. The sensors when tripped activate lights and hooters 0.5km away so that approaching trains can safely stop

What are the nets one sees on rockfaces or hillsides abutting railway lines in some areas?

July 19, 2019

In areas where rock falls or landslides are common, IR uses meshes or nets fixed to the rockfaces or the hillsides -- these are 'stitched' to the hillside at frequent intervals. They act to trap and stop, or slow down falling or sliding rocks and boulders so that they either do not fall all the way down, or lose their kinetic energy and fall

What tolerances of gauge does IR permit?

July 19, 2019

Broad Gauge Deviations allowed from nominal gauge: -5mm to +3mm on straights and curves over 350m radius, and up to +10mm on curves sharper than 350m radius. (The older specifications were: On straight sections, a deviation of +/- 6mm; and on curves a deviation of up to +20mm/-6mm.) High-speed sections (130+ km/h) have tighter tolerances of +/-

What are ‘GeoJute’ and ‘GeoGrids’? How does IR prevent soil erosion in the areas where track is laid?

July 19, 2019

Erosion of the soil around a track formation can be quite dangerous as the track may subside or warp and move. In many cases IR simply encourages the local shrubby vegetation to grow in the areas near the track to stem the erosion. Where severe erosion is a problem, 'GeoJute' has been used. This is an ecologically safe material made of jute yarn

रेलवे का बड़ा एलान, …तो ट्रेन और स्‍टेशन पर फ्री होगा खाना और अन्‍य सामान

July 19, 2019

भारतीय रेल को अगर हिंदुस्‍तान के लोगों की लाइफलाइन कहें, तो गलत नहीं होगा। रोजाना लाखों लोग ट्रेन में सफर करते हैं। ऐसे में मोदी

What sort of sub-ballast, blanket, and subgrade layers are provided in the track formation?

July 18, 2019

IR generally does not use a separate sub-ballast layer below the ballast layer. A blanket layer of coarse, granular material is usually provided directly below the ballast layer. Blanket layers are not provided for tracks on rocky beds, or on well-graded gravelly or sandy beds. Blankets of at least 45cm thickness are provided for tracks laid on

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Does IR operate diesel-electric or diesel-hydraulic multiple units of any kind?

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