The following readings were taken during a leveling process:1.18, 1.55, 1.50, 1.52, 0.85, 1.25, 1.35, 1.65, 1.30 and 1.25 m. Write how many number of instrument positions and number of stations, if the instrument is changed after 2nd and 8th readings. O a. 2 and 9 O b. 3 and 10 O C. 3 and 8 d. 2 and 8

The following readings were taken during a leveling process:1.18, 1.55, 1.50, 1.52, 0.85, 1.25, 1.35, 1.65, 1.30 and 1.25 m. Write how many number of instrument positions and number of stations, if the instrument is changed after 2nd and 8th readings. O a. 2 and 9 O b. 3 and 10 O C. 3 and 8 d. 2 and 8

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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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.
A differential leveling circuit began on BM Hydrant (orthometric height 5869.31 ft) and closed on BM Rock (orthometric height 5880.03 ft). The plus sight and minus sight distances were kept approximately equal. Readings (in feet) given in the order taken are 2.68 (+S) on BM Hydrant, 5.59 (−S) and 10.83 (+S) on TP1, 6.46 (−S) and 10.61 (+S) on BM 1, 8.91 (−S) and 7.57 (+S) on BM 2, 5.14 (−S) and 9.01 (+S) on TP2, and 3.83 (−S) on BM Rock. Prepare, check, and adjust the notes.
A differential leveling circuit began on BM Hydrant (orthometric height 5869.31 ftft) and closed on BM Rock (orthometric height 5880.03 ftft). The plus sight and minus sight distances were kept approximately equal. Readings (in feet) given in the order taken are 5.48 (+S) on BM Hydrant, 5.59 (−S) and 10.83 (+S) on TP1, 9.26 (−S) and 13.41 (+S) on BM 1, 8.91 (−S) and 7.57 (+S) on BM 2, 5.14 (−S) and 9.01 (+S) on TP2, and 6.63 (−S) on BM Rock. Prepare, check, and adjust the notes. Determine the Plus and Minus adjustments. Express your answers in feet to two decimal places separated by a comma. Determine the page check. Express your answer in feet to two decimal places. Determine the misclosure and the correction. Express your answers in feet to two decimal places separated by a comma.
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A differential leveling loop began and closed on BM Tree (elevation 323.48 ft). The plus sight and minus sight distances were kept approximately equal. Readings (in feet) listed in the order taken are 3.18 1 +S2 on BM Tree, 4.76 1 -S2, and 2.44 1 +S2 on TP1, 3.05 1 -S2 and 6.63 1 +S2 on BM X, 3.64 1 -S2 and 2.35 1 +S2 on TP2, and 3.07 1 -S2 on BM Tree. Prepare, check, and adjust the notes.
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