While cutoff ranks can vary each year, here's some information based on past data:
IET Lucknow:
For the general category, the closing rank for D.Engg was around 80-100 in the previous years. For the OBC category, it was around 50-60.
HBTI Kanpur:
For the general category, the closing rank for D.Engg was around 120-150 in the previous years. For the OBC category, it was around 70-90.
Given your ranks, the possibility of admission to IET Lucknow or HBTI Kanpur seems less likely based on previous trends. However, cutoff ranks are subject to change each year depending on various factors such as the number of applicants, seat availability, and reservation policies.
It's recommended that you monitor the official websites of IET Lucknow and HBTI Kanpur for the latest information on admission criteria and cutoff ranks. You may also consider exploring other engineering colleges and institutes that accept diploma holders for further education.