Exercise 12 |
Ex.12-1 Enumerate the order in which the permanent adjustment of a tilting level are carried out. Ex.12-2 Describe the two peg method of permanent adjustment of a dumpy level. Ex.12-3 In the two-peg test of a level, the following observations are taken:
M is equidistant from A and B, P is 40 m from A and 240 m from B. What is the true difference in elevation between the two points ? With the level in the same position at P, to what staff reading on B should the line of sight be adjusted ? What is the corresponding staff reading on A for a horizontal line of sight ? Check these two staff readings against the true difference in elevation, previously determined. |
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