Hi Sulochana if you have an other cooleges do try them do keep this college also in your list but give other collges a bit high preferences.

• Punjab Engineering College Chandigarh Environmental Engineering 
• Malaviya National Institute of Technology Jaipur Renewable Energy
• National Institute of Foundry & Forge Technology Hatia Ranchi Environmental Engineering
• National Institute of Technology Agartala Environmental Engineering
• National Institute

Hello Ram,

Based on this score, The chances are there to get a seat in IITs but chances are less to get the core branches. You can have the chance to get M.tech Climate Science and Technology, M.tech Infrastructure Engineering and Management, M.tech Structural Engineering-

Indian Institute of Technology Bhubaneswar

You have to little more about 600onwards to get an IIT dhanbad

As per your score and previous year cutoff, the colleges you get in first round are:-

IIT Bombay  Centre of Studies in Resources Engineering      Geoinformatics and Natural Resources Engineering 

IIT Kharagpur         Agricultural and Food Engineering         Food Processing Engineering

Hii

Its hard to say as because lot many factors depends on your caste ,specially aged ,graduation percentage , so i would like to suggest you to check our tool for PSU & Colleges , kindly refer the below link along with the check the cut off as well

Https://engineering.careers360.com/gate-college-predictor?icn=GATE-clgpd&ici=clevertap-exit-intent

Hello

You have decent chances of admission in M.Tech Environmental Engineering in NIT Agartala, IIT Guwahati. You can use the GATE College Predictor Tool to check the complete list of colleges and the courses which you can get based on your score

https://engineering.careers360.com/gate-college-predictor

Good Luck!

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Hello.

There are many books for environmental engineering objective type ,but coming up with content and precise answers - 

Objective Environmental sciences by R.Gupta's

Environmental engineering by N.N .Basak 

These are mostly helpful for preparing the entrance exam .Hope this information is useful and best of luck .