Amazon Brings 30 Practice Sets Railway Recruitment Boards RRB (Non-Technical Cadre) 2016 Book Just Rs. 87. The Railway Recruitment Board (RRB) has announced the recruitment to the posts of Non-Technical Cadre in Indian Railway. The recruitment to the posts of Non-Technical Cadre in Indian Railways will be done on the basis of a common written examination to be held on the same day by all participating RRBs. This book containing practice sets has been designed for the common written examination for recruitment to the posts of Non-Technical Cadre. @amazonIN