The written examination of the Geologists Examination is conducted according to the following scheme.
There are thirteen papers to be written whose maximum marks are as mentioned under :
The following will be the subjects for the written examination, for selection to the post of Geologist, Geophysicist and Chemist Group 'A' in GSI and Junior Hydro-geologist (Scientist 'B'), Group 'A' for Central Ground Water Board.
| Subject | Duration | Maximum Marks | |
| 1. General English (common for all category) | 3 hrs | 100 | |
| Category - 1 For the post of Geologists | |||
| 2. Geology Paper I | 3 hrs | 200 | |
| 3. Geology Paper II | 3 hrs | 200 | |
| 4. Geology Paper III | 3 hrs | 200 | |
| Category - 2 For the post of Geophysicists | |||
| 2. Geophysics Paper I | 3 hrs | 200 | |
| 3. Geophysics Paper II | 3 hrs | 200 | |
| 4. Geophysics Paper III | 3 hrs | 200 | |
| Category - 3 For the post of Chemists | |||
| 2. Chemistry Paper I | 3 hrs | 200 | |
| 3. Chemistry Paper II | 3 hrs | 200 | |
| 4. Chemistry Paper III | 3 hrs | 200 | |
| Category - 4 For the Post of Jr. Hydrogeologist | |||
| 2. Geology Paper I | 3 hrs | 200 | |
| 3. Geology Paper II | 3 hrs | 200 | |
| 4. Hydrogeology | 3 hrs | 200 | |
Note I : Candidates competing for selection to the posts of Geologist, Geophysicist, Chemist and Junior Hydrogeologist will be required to appear in all the subjects mentioned against respective category above.
Note II : Candidates competing for selection for both the posts of Geologist and Jr. Hydrogeologist will be required to appear in all the subjects mentioned against Categories 1 and 4 above.
Note III : If any candidate failed to appear in any one or more of above papers, meant for written examination for selection to the post of Geologist, Geophysicist, Chemist, their candidature shall stand rejected and part of written examination appeared by him/her shall not be evaluated and counted for any purpose.