Hi Babu KS --
60 days used to be the case -- it seems to be taking a little longer nowadays. There's no way to "track" the case, but apparently, the consulate will confirm receipt of your case if you call them. I'll let peter_guest write more -- he's had direct experience with the Chennai consulate. My case reached Delhi in early June, and they replied to my email confirming receipt and saying that they will schedule me in the "forthcoming months." I don't know that they will actually tell you the interview date in email -- so the only real recourse is to check the consulate webpage around the middle of each month, when the interview list for the next month comes out.
Best wishes!