(Alternate Peg Method) In the two-peg test of a dumpy level, the following observations are taken: Rod reading On point A On point B Instrument set-up near M (m) Instrument set-up near P (m) 0.296 1.563 0.910 2.140 Requirements: a. Determine the true difference in elevation between A and B. b. Determine the error in the line of sight for the net distance AB c. If the line of sight is not in adjustment, determine the correct rod reading on A with the instrument still set up near B.

(Alternate Peg Method) In the two-peg test of a dumpy level, the following observations are taken: Rod reading On point A On point B Instrument set-up near M (m) Instrument set-up near P (m) 0.296 1.563 0.910 2.140 Requirements: a. Determine the true difference in elevation between A and B. b. Determine the error in the line of sight for the net distance AB c. If the line of sight is not in adjustment, determine the correct rod reading on A with the instrument still set up near B.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Situation 1: A two-peg test is used to check whether the ine of sight of the level is in perfect adjustment and the following rod readings are taken, with instrument set up near A, backsight on A is 1.623 m. and foresight reading on B is 2.875 m. With the instrument set up near B, backsight on B is 1.622 and a foresight on A is 0.362 m. a. Find the difference in elevation. b. What should be the correct rod reading on A to give a level line of sight with instrument still set up near B? c. What should be the correct rod reading on B to give a level line of sight with instrument still set up near A?
Which of the following may cause errors in leveling measurement? (Multiple choice) (Multiple choice) 1 □ A. The level tripod sinks O B. Reading Error □ C. The instrument is not erected at approximately the same distance from front to back □D. Improper implementation of the centering of the level □ E. Subsidence occurred at the level where the level was erected □ F. Vertical dial error of the level
Q#15: The following is the data relative to observed stations made on vertically held staff with a tacheometer fitted with an anallactic lens. The constant of instrument was 100. Instrumen Height of axis Staff Stn. W.C.B Vertical Hair Readings Remarks t Stn Angle 2.56 A 12°25' 0°0' 2.88, 3.25, R.L of O = 3.62 230.25 B 60°45' +15°10' 2.83, 3.15, 3.47 Calculate the distance AB, and reduced levels of A and B. O Activate Windows
Situation 1] The two-peg test is used to determine if the line of sight of an engineer's level is in adjustment, reading on A is 1.623 m, on B is 1.622 m, and rod reading on A is 0.362 m. near A, rod rod reading on B is 2.875 m; with instrument set up near B, rod reading and the following rod readings are taken: with instrument set up i. The correct rod reading on A to give a level line of sight with the instrument still set up near B should be? II. In order to adjust the line of sight, the horizontal cross hairs should be moved? Upward by
> Sur-Mid20 > aull albjall > 2021- 2020 diuull coai Jlibiol > 2021- 2020 jal p الوقت المتبقى 21.09 What is the estimated error of an EDM instruments having specified errors of ±( 4 mm + 2 ppm) in measuring ?distance 8.0762 km What is the area of below cross sectionif you know the formation level is 27.21m and ground elevation equal 25.71 EN (Telegram (S2
In the two-peg test of a dumpy level using alternate method, the full observation was taken. Instrument set up near M 0.296 m Instrument set up near P 1.563 m Rod Reading on point A Rod Reading on point B 0.910 m 2.140 m thanks Point M is equidistant from both A and B, while P is 2.50 m. away from A along the extension of line AB and 79.27 m from B. a.) Determine the true difference in elevation between A and B. b.) Determine the error in the rod reading at B with the instrument still at P. c.) Determine the correct reading on rod B for a horizontal line of sight with the instrument still at P.
(8) A tacheometer and the following a staff vertically held. was set up at a station C readings were obtained on Inst. Station Remark Staff Station BM RL of вмо = 750-50 0.750,1.500, 2.250 D m calculate the horizontal distance CD and RL of D When the constants of instrument are 100 and 0.15. Vertical angle -5°20' +8°12' Hair readings (m) 1.50, 1.800,2.450
Two pegs A and B are driven in the ground at a distance of abour 120 m. A dumpy level is set up at station Q exactly mid-way between pegs A and B. The staff readings on peg A and B were found to be 3.513 m and 3.149 m. The instrument was then moved and set up at a point P beyond peg A, in line BA produced at a distance of 20 m from A. The staff readings on pegs A and B were 1.763 m and 0.847 m respectively. What is the true difference in elevation between the two points? With the level in the same position at P what rod readings on B should the line of sight is adjusted. Check these reading against the true difference in elevation previously SOLVE THE FOLLOWING PROBLEMS: Problem Sketch Solution Answer
Two pegs A and B are driven in the ground at a distance of abour 120 m. A dumpy level is set up at station Q exactly mid-way between pegs A and B. The staff readings on peg A and B were found to be 3.513 m and 3.149 m. The instrument was then moved and set up at a point P beyond peg A, in line BA produced at a distance of 20 m from A. The staff readings on pegs A and B were 1.763 m and 0.847 m respectively. What is the true difference in elevation between the two points? With the level in the same position at P what rod readings on B should the line of sight is adjusted. Check these reading against the true difference in elevation previously determined. a. Sketch b. Solution C. Answer