Thanks for the info... it seems that the single/double track on this Chandausi - Aonla Stretch is Unelectrified just like the Lucknow - Varanasi Single Track via Rae Bareli - Ameti... so both Howrah - Amritsar Exp & Mail Trains don't use electric locos end-to-end. Only Akal Takht & Durgiana Exp are getting this privilege.... another thing that I have noticed is that Sultanpur Jn is not connected with the Dhanbad - Gaya Grand Chord Route Stations by a Single Train as KOAA - JAT Exp travels via Gaya - Ayodhya - Jaunpur Jn Route :-)