Hi

If we estimate in accordance to previous year cutoff trends, then you need atleast 2 Rounds of Counselling to get Civil Engineering at NIT Surathkal, even though it is your Home State NIT. Further a gap of 1.5k can fill even within a single round or can take upto as long as 3 rounds of Counselling. So keep high positive hopes. You'll get it.

Best of Luck. 

Hope this helps.

Cheers!