In a two-peg test using a dumpy level, the following observations were takenROD READINGINSTRUMENT SET-UP AT cINSTRUMENT SET-UP AT DA1.1530.5860.9910.257Point C is equidistant from A and B and D is 3 m from A and 73 m from B.a. With the level position at D, to what rod reading on B should line of sight be adjusted?b. What is the corresponding rod reading on A for a horizontal line of sight with instrumentstill at D?

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Answered: In a two-peg test using a dumpy level,…

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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- In reciprocal leveling across a deep ravine the following sets of rod readings were taken: Instrument set-up near A : BS on A = 1.719m, FS on B = 2.578m Instrument set-up near B : BS on A = 1.335m, FS on B = 2.176m Point A has a known elevation of 197.428m. Determine the elevation of point B.
solve a and b given asap. a) In a two-peg test of a dumpy level, the following readings were taken: Instrument at R, mid-way Staff readings between pegs P and Q: at P 1.525 m at Q 1.230 m Instrument near P: at P 1.420 m at Q 1.025 m How much is the line of collimation inclined upwards or downwards? What should be the correct staff reading at Q with the instrument near P to keep the line of collimation truly horizontal? b) Two pegs A and B are driven 100.0 m apart. In the adjustment of a dumpy level, following observations were recorded: observations given in the image. State whether the instrument is in adjustment. Find the R.L. of B.
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?
Compute for HD if the upper, middle and lower hair readings in a three-wire levelling are 2.79m, 2.42m, and 2.06m respectively. Assume standard or usual values of K and C.
The following data were obtained by a stadia measurement; vertical angle is 30°23’, and observed stadia intercept is 2.20m. The stadia interval factor at the measurement used 95.50m and C is 0.30m, if the height of the instrument is 1.62m, and the rod reading is taken 1.95m. Determine the HD, VD, ID, and DE. Given: K= 95.5m S= 2.2m C = 0.3m Vertical Angle = 30°23’
Q#1: A profile levelling is carried out and consecutive readings were observed on staff rod along a chain line at common interval of 10 meter which are listed below in table. First reading is taken on bench mark of 105.615 meter reduce level. Station Points Chainage (m) Staff Readings (m) Remarks BS IS FS 1 00 3.005 BM 2 10 2.285 3 20 1.560 4 30 1.785 5 40 2.105 6 50 2.875 3.105 CP 1 X 53.35 3.465 7 60 3.955 8 70 3.120 9 80 3.015 10 90 2.580 11 100 1.955 CP 2 Determine the reduce levels of all points using both line of collimation and rise and fall method. (Present your answer in table form).
In the two-peg test of a dummy level, the following observations are taken. *INserted Photo* Point M is equidistance from both A and B, while P is 2.50m away from B along the extension of line AB and 90 meters from B. Requirements: Determine the true difference in elevation between point A and B. Answer: ____________ 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. Answer: ____________
To adjust a dumpy level by peg method of adjustment, two points A and B wereset up. With the instrument at point A, the rod reading at A was 1.623m and theforesight at B was 2.875m. The level is transferred at B and the backsight at B was1.622m while the rod reading at A was 0.362m.a. Find the true elevation between A and B.b. What is the error in the line of sight?c. Determine the correct reading at A that will give the level line of sightwith the instrument still at point B.
a.) Using the Stadia Reduction Table,what is the difference in elevation if the observedvertical angle is 19⁰24''?b.) Using the Stadia Reduction Table,what is the horizontal distance if the observedvertical angle is -7⁰14''?c.) Using the Stadia Reduction Table,what is the Chd if the instrument constant is 0.381and the observed vertical angle is -16.80⁰?
Leveling Methods An instrument at point B is set up in the bottom of a depression withits scope measured 1.40m above ground. The purpose of the station is todetermine the elevations of both points A and C which are located on thepeaks of the valley. Two vertical angles of +11°30’ and +13°15’ are madewith the scopes of the instrument to points A and C respectively.Preliminary survey suggests that points AB is measured with a horizontaldistance of 583m and points BC is measured with a horizontal distance of1,125m. Considering the earth’s curvature and atmospheric refraction,determine the elevation of both A and C if the elevation of the stationis 75m above sea level.
Lines of levels were run requiring n instrument setups. If the rod reading for each backsight and foresight has a standard deviation s, what is the standard deviation in each of the following level lines?(a) n = 15, s = ±0.015 ft(b) n = 28, s = ±5 mm
LY - Compute the cormected clevations i the 50.940 m and the last elevation (B.M 10, the Firs clevation 165042 m are Point | Distance | RL. | Correction | Corrected | Remarks (m) m) . BMI 150940 First BM. BMS 155,036 Computed Last BM.

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