error due to horizontal axis not being perpendicular to the vertical axis
index error i.e. error due to imperfect adjustrnent of the vertical circle vernier
error due to non-parallelism of the- axis of telescope level and line of collimation
none of the above
Discuss in Comment
Civil Engineering Objective question.
Civil engineering Online Notes.
Civil Engineering PSC Old Question.
Civil Engineering Short Question Answer.
Civil Engineering Most Probable Question.