GATE

Hi Akshay,
I have sorted some important books as per your query below. Refer to them for GATE in Civil engineering:
1. (I) Strength of Material: Dr. R. K. Bansal
2. (ii) Strength of Material: U. C. Jindal
3. Structural Analysis: Theory of structures S. Ramamrutham & R. Narayan
4. R. C. Design: Reinforced Concrete Design Devdas Menon & S. Pillai
5. Design of Steel Structure: S. K. Duggal
6. Environment Engineering:
Water Supply Engineering: Environmental Engineering v.1
&
Sewage Disposal and Air Pollution Engineering: S. K. Garg
7. Soil Mechanics: Basics and Applied Soil mechanics Goal Ranjan & A. S. R. Rao.
8. (I)Hydraulics and Fluid Mechanics: Dr. P. N. Modi & Dr. S. M Seth
9. (ii)Fluid Mechanics in SI Units: Yunus Cengel
10. Highway Engineering: S. K. Khanna & C. E. G. Just
11. Surveying (vol. 1,2,3): B. C. Punia, Ashok Jain & Arun Jain
12. Engineering Hydrology: K Subramanya
13. Irrigation Engineering and Hydraulic Structures: S. K Garg
Hope this helps.
Thanks.

GATE Eligibility:
B.E. / B.Tech. / B.Pharma. B.Arch
B Sc. (Research)/ B. S. - Bachelors degree in Science (Post-Diploma/ 4 years after 10+2)
M.Sc. / M.A. /MCA or equivalent
Int. M.E. / M.Tech. Int. M.E. / M.Tech. Or Dual Degree (after Diploma or 10+2)
Int. M.Sc. / Int. B. S. -M. S. Professional Society Examinations (equivalent to B.E. / B.Tech. / B.Arch. )
Candidates who have obtained/are pursuing their qualifying degree from countries other than India: I) must have completed or are in the final year of their Bachelors degree (duration: at least 4 years) in Engineering/Technology or; ii) must have completed or are in the final year of their Post Graduate (Masters) degree (duration: at least 2 years) in any relevant subjects in Science.