is it neccesary to register in institute of chartered accountant before applying for cpt form?

Yes

Hi Aman, Yes it is necessary to register. To get yourself registered for CA in ICAI you need to contact with the Board of Studies by submitting the prescribed filled in form. For further information check the links below: http://tinyurl.com/38morjc http://tinyurl.com/2ulqhsn Hope this resolves