LevelingSensitivity of the Level TubeTheory & Practice in Surveying

Sensitivity of the Level Tube – Problem 2

Using an engineer’s level, the reading on a rod 80m. way was observed to be 2.81m. The bubble was leveled thru 5 spaces on the level tube and the rod reading increased to 2.874m.

  1. What is the angular value of one space of the tube, in seconds of arc?
  2. What is the angle that the bubble on the tube was deviated due to an increase in the rod reading by moving the telescope upward, in seconds of arc?
  3. What is the radius of curvature of the level tube if one space on the tube is 0.60mm. long?




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