engineering recuitment OSSC Combined Technical Services (ଓଡିଶା) Mock Test 2023-24 Surveying Compass Surveying and Theodolite
Which among the following error can be eliminated only by careful levelling with respect to the altitude bubble if it is in adjustment?
1
Error due to imperfect adjustment of plate levels
2
Error due to imperfect adjustment of the vertical circle vernier
3
Error due to level of collimation not being perpendicular to the horizontal axis
4
Error due to non - parallelism of the axis of telescope level and line of collimation