Hello Emran, 

The cut-off for the year 2018 for the OBC CATEGORY to get civil branch in IIT BHU is given below :

OBC NCL :

• Opening Rank : 1724
• Closing Rank : 2457

Similarly, for the year 2017 is :

• Opening Rank : 1429
• Closing Rank : 1873

Following are the factors which are considered for determining the cut-off for JEE Advanced for admission into IIT BHU :

• Total number of candidates applied for the JEE Advanced Examination. 
• Total number of candidates appeared in JEE Advanced 2019 entrance examination. 
• The availability of seats in respective programmes in IIT BHU.
• The difficulty level of examination conducted by the IIT's.
• The most important, the previous years cutoff trends.

MODE OF ADMISSION :

• It is a two-step process. You need to qualify the JEE (Main) exam and then take the JEE (Advanced) exam for getting into IIT BHU. 
• A candidate must have secured at least 75% marks (65% for SC/ST/PwD) in Class XII OR One must be within the category-wise top 20 percentile in his/her respective Class XII board examination.
• The admissions are done on the basis of rank obtained in JEE (Advanced) through JoSAA Counselling.

Let's see the fee structure of IIT BHU :

• Caution Money (One Time, Refundable) : ₹9,000
• One Time Fee : ₹5,750
• Tuition Fee (per Semester)  : ₹1,00,000
• Other fees (per Semester) : ₹5,950

IIT BHU Placements :

• IIT BHU has an impressive placement record for the years. 
• In 2016, the highest package offered was Rs. 2.27 crore Per Annum by Google US. 
• In 2016, the average package offered was Rs. 10.90 Lakhs Per Annum.
• In 2015, the top packages offered were Rs. 2.03 crore Per Annum by Oracle and Rs. 1.63 crore Per Annum by Google (including Employee Stock Option Plan – ESOP). 
• There are many other prestigious employers such as Agserve Goomalling, Applied Materials, Google, Infosys, General Motors, Microsoft, Oracle, Walmart, Accenture, Vodafone, TATA Steel, etc. which recruit students from the IIT BHU campus itself  

Hope this helps!! 

Good Luck :)