For which of the following permanent adjustments of theodolite, the spire test is used ?
A. adjustment of plate levels
B. adjustment of line of sight
C. adjustment of horizontal axis
D. adjustment of altitude bubble and vertical index frame
Answer:C
For which of the following permanent adjustments of theodolite, the spire test is used ?
A. adjustment of plate levels B. adjustment of line of sight C. adjustment of horizontal axis D. adjustment of altitude bubble and vertical index frame