If Odisha is your home state a rank around 7500 will ensure you to get into the best branch there i.e Mechanical. For other state student you need around 6000. For other branches the count extends till 40000 for GE category students.

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All the very best and good luck.

Dear Shibaji,

According, to previous year cut off you need to score around 185 marks in JEE Main to get Mechanical branch in NIT Rourkela in general category. 

Cut off marks varies as per the branches. 

Good Luck!!