In the two-peg test of a dummy level, the following observations are taken. On point A On point B INSTRUMENT SET UP at M 2.682 1.239 INSTRUMENT SET UP at P 1.876 0.565 Point M is equidistance from both A and B with 92 meters, while P is 2.50m away from A along the extension of line AB. Requirements: Determine the true difference in elevation between point A and B. With the level still set up at P, determine the rod reading on A and B to which the line of sight should be adjusted. If the instrument needs to be adjusted, determine the following false difference in elevation inclination of the line of sight and the error in the reading of far rod A and B instrument set up at P.
In the two-peg test of a dummy level, the following observations are taken. On point A On point B INSTRUMENT SET UP at M 2.682 1.239 INSTRUMENT SET UP at P 1.876 0.565 Point M is equidistance from both A and B with 92 meters, while P is 2.50m away from A along the extension of line AB. Requirements: Determine the true difference in elevation between point A and B. With the level still set up at P, determine the rod reading on A and B to which the line of sight should be adjusted. If the instrument needs to be adjusted, determine the following false difference in elevation inclination of the line of sight and the error in the reading of far rod A and B instrument set up at P.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
In the two-peg test of a dummy level, the following observations are taken.
|
|
On point A |
On point B |
|
INSTRUMENT SET UP at M |
2.682 |
1.239 |
|
INSTRUMENT SET UP at P |
1.876 |
0.565 |
Point M is equidistance from both A and B with 92 meters, while P is 2.50m away from A along the extension of line AB. Requirements:
- Determine the true difference in elevation between point A and B.
- With the level still set up at P, determine the rod reading on A and B to which the line of sight should be adjusted.
- If the instrument needs to be adjusted, determine the following false difference in elevation inclination of the line of sight and the error in the reading of far rod A and B instrument set up at P.
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