As per the advt by Union public service Commision, New Delhi. Interview was based on basics and applications of chemical engineering Interview was for around 10 minutes. One such question was why tap is given in steam pipelines. Questions iniyialy were asked from my previos experince. After shortlisting upsc informed me and OFB too send me info. Normaly they post people neares to hometown but in my case it was the farthest.