The petitioner has approached this Court with a prayer for quashing order dated 25.3.2010 (P.7) passed by the Central Administrative Tribunal, Chandigarh Bench, Chandigarh (for brevity ' the Tribunal') dismissing OA No. 512 HR of 2008. He had approached the Tribunal by filing OA with a prayer for quashing order dated 5.8.2008 passed by the Sr. Divisional Personnel Officer, Northern Railways, Ambala Cantt. setting aside the selection for promotion to the post of Driver Passenger in the grade of Rs. 5500-9000 in Mechanical (O&F) Department from the post of Loco Pilot. It is appropriate to mention that some of the petitioners have been working as Sr. Loco Pilot (Goods) in the scale of Rs. 5500-9000 whereas the others are working as Loco Pilot (Goods) in the pay scale of Rs. 5000-8000. The promotional post of Driver Passenger is in the pay scale of Rs. 5500-9000. On 18.2.2008, the respondents had conducted a selection process for the post of Driver Passenger. The selection was to be made on