11.The angle between the prolongation of the preceding line and the forward line of a traverse is called

12.Transit rule of adjusting the consecutive coordinates of a traverse is used where

13.If the intercept on a vertical staff is ob-served as 0.75 m from a tacheometer, the horizontal distance between tacheometer and staff station is

14.The instrument used for accurate centering in plane table survey is

15.The size of a plane table is