The line of collimation must be parallel to the horizontal axis.

Related MCQs

• The line of collimation method of reduction of levels, does not provide a check on
• The line of collimation should be
• Collimation method is used in
• The reduced level of the plane of collimation is
• The collimation method for obtaining the reduced levels of points does not provide a check on
• In order to fix up the directions of the survey lines in the compass survey, the horizontal angle between the survey line and a fixed line of reference is measured. This fixed line reference is the magnetic meridian.
• The axis of bubble tube must be perpendicular to the vertical axis.
• The difference between a level line and a horizontal line is that
• The projection of a traverse line on a line parallel to the meridian is known as
• The process of turning the telescope about the vertical axis in horizontal plane is known as