The permanent adjustment of theodolite is made in a specific sequence so as to avoid any disturbance in the previous adjustment caused due to next adjustment. The correct sequence is best represented by
1
Plate level Test → Cross Hair Ring Test → Spire Test → Vertical Arc Test
2
Cross Hair Ring Test → Spire Test → Plate level Test → Vertical Arc Test
3
Plate level Test → Spire Test → Cross Hair Ring Test → Vertical Arc Test
4
Spire Test → Cross Hair Ring Test → Vertical Arc Test → Plate level Test