2. A reciprocal leveling is observed across a wide river and the reciprocal level readings were taken between points A and B as follows. With instrument set up near A, the rod readings on A are 3.383 m and 3.395 m. The reciprocal level readings on the opposite side of the river at point B are 4.628, 4.619, 4.622 and 4.625 m. With the instrument set up near B the rod readings on B are 5.578 m and 5.576 m, and the rod readings on the on the opposite side of the river at point A, the rod readings are 4.243, 4.248, 4.186 and 4.194. a) Compute the difference in elevation between A and B with the instrument set up near A. b) What is the true difference in elevation between A and B? c) If the elevation A is 255 m, what is the elevation of B?

2. A reciprocal leveling is observed across a wide river and the reciprocal level readings were taken between points A and B as follows. With instrument set up near A, the rod readings on A are 3.383 m and 3.395 m. The reciprocal level readings on the opposite side of the river at point B are 4.628, 4.619, 4.622 and 4.625 m. With the instrument set up near B the rod readings on B are 5.578 m and 5.576 m, and the rod readings on the on the opposite side of the river at point A, the rod readings are 4.243, 4.248, 4.186 and 4.194. a) Compute the difference in elevation between A and B with the instrument set up near A. b) What is the true difference in elevation between A and B? c) If the elevation A is 255 m, what is the elevation of B?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: 1. The surveying team at UTM can make taping measurements with an error of ±0.03 ft per 100-ft tape…

A: Note:- Hi! Thank you for the question As per the honor code, We’ll answer the first question since…

Q: The readings given below were made with a tacheometric theodolite having a multiplying constant of…

Q: Reciprocal levelling is done to test a dumpy level, along a chain line, at a common interval of 25m,…

A: Given DatReduced Levels (RLs) at first station = 97.535 mReadings (BS, IS, FS) = 3.200, 2.135,…

Q: 12. Complete the benchmark-leveling field notes shown in Figure B by computing and recording the HI…

A: Objective: To completer the given leveling notes and perform the arithmetic checks. Given: Sta.…

Q: What is required is to find all the missing values in the table below for one of the successive…

A: St. B.S I.S F.S Rise Fall Elevation Remark 1 3.150 219.965 2 1.770 3.85 0.700…

Q: Reciprocal levelling is done to test a dumpy level, along a chain line, at a common interval of 15m,…

A: The readings from the dumpy level are given with 135m as the starting point with 15m intervals,…

Q: (b). Following are the results of a seismic refraction survey done on a relatively flat area shown…

A: Solution Based on the data given plot the graph with distance x, on the x axis and time on the…

Concept explainers

Errors in surveying

An error in surveying is defined as the difference between two or more values of an identical quantity. However, the estimates are never accurate and there will always be a degree of variability regardless of the research tool or method used. These differences are known as errors that need to be reduced or eliminated to maintain certain levels of accuracy. Even if you carefully follow the prescribed test procedures, the considerations may contain errors.

Question

2. A reciprocal leveling is observed across a wide river and the reciprocal level readings were taken
between points A and B as follows. With instrument set up near A, the rod readings on A are
3.383 m and 3.395 m. The reciprocal level readings on the opposite side of the river at point B are
4.628, 4.619, 4.622 and 4.625 m. With the instrument set up near B the rod readings on B are
5.578 m and 5.576 m, and the rod readings on the on the opposite side of the river at point A, the
rod readings are 4.243, 4.248, 4.186 and 4.194.
a) Compute the difference in elevation between A and B with the instrument set up near A.
b) What is the true difference in elevation between A and B?
c) If the elevation A is 255 m, what is the elevation of B?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

Step 2

Step 3

Step 4

Step by step

Solved in 4 steps with 4 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

During the dumpy level test, the observations are as follows: Staff reading station Instrument placed A B A 1.605 2.235 В 2.564 3.545 Distance between A and B is 250 m and R.L of A is 435.062 m, Find the R.L of B. a) 436.25 b) 435.05 c) 434.25 d) 435.86
wh
Situation 6. In the two peg-test method of a dumpy level the following observations were taken. Instrument set Instrument set up near M up near P Rod Reading on A 1.505 m 0.938 m Rod Reading on B 2.054 m 1.449 m 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. 12.) Determine the true difference in elevation between A and 5. a.) 1.206 m b.) 1.106 m c.) 0.614 m d.) 0.814 m 13.) Determine the error in rod reading at 5 with the Instrument still at P. a.) 0.038 m b.) 0.046 m c.) 0.058 m d.) 0.026 m 14.) Determine the correct reading on rod B for a horizontal line of sight with the Instrument still at P. a.) 2.102 m b.) 2.178 m c.) 2.094 m d.) 2.186 m
2. In the two peg test method of a dumpy level, the following observations were taken. Instrument near A Instrument near B Rod rdg. on A Rod rdg. on B 0.324 m 1.445 m 1.203 m 2.523 m a. Determine the error in the line of sight. b. What is the difference in elevation between A and B? c. Determine the correct rod reading on A with the instrument still set up at B.
Fundamentals of Surveying problem
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.
A field party is capable of making taping observations with a standard deviation of +/-0.003 m per 30-m tape length.
In the two-peg test of a dumpy level the following observations were taken: with level setup near A, observed readings are a=1.855 m and b=1.434 m; with level setup near B, c=1.790 m and d=2.211 m. Determine the correct reading on the rod held at A with the instrument still in the same position at B for a horizontal line of sight.
1. TWO-PEG TEST. In the two-peg test of dumpy level, the following observations are taken: ROD READING INSTRUMENT SET UP INSTRUMENT SET UP NEAR P NEAR M On Point A On Point B i0.296 m 1.563 m 0.910 2. 140 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. Requirements: a. Determine the true difference in elevation between points A & B. b. Check if the line of sight is in adjustment. 14 c. If the instrument needs to be adjusted, determine the following: "false" difference in elevation, inclination of the line of sight, and the error on the reading on the far rod. d. With the level still set up at P, determine the rod reading on B to which the line of sight should be adjusted. e. Perform the customary check. Fig. 16-3. Tw0-peg test. -Leveling Rod Loveling. Rod c=1.563 m d 2.140 b=0.910m a=0296m Ground Surface La (2.50 m) (76.77 m) (79.27 m)
bläs 7 Staff readings on pegs x and y from X station are 1.755 m and 2.850 m, and from station Y on staff head at Y and X are 0.655 m and 1.560 m. If reduced level of X is 105.5 m, the * reduced level of Y is 105.5 m 104.5 m 105.0 m 104.0 m
Determine: (a) The probable error of the mean in Taping Operation 1. (b) The probable error of the mean in Taping Operation 2. (c) The combined most probable measurement of the frontage, in meters. Answer these questions using this taping scenario. Two surveying tapes were used in measuring the frontage of an open field. The resulting measurements are as follows: Taping Operation 1 Taping Operation 2 300.977m 300.761m 300.415m 300.772m 299.743m 300.776m 299.994m 300.713m
QUESTION S In a two-peg test of a dumpy level, the following observations are taken. What is the true difference in elevation between A and B? Instrument at A Instrument at B Rod Reading on A Rod Reading on B 1.508 2.024 Rod Reading on A Rod Reading on B 0.938 1.449 QUESTION 6 1. The following data were taken from PEG method of adjustment. Point 1 is midway between A and B. Point 2 is 20m to the left of A and 120m from B. Determine the difference in elevation between A and B. (give your answer in two decimal places) Instrument at 2 Instrument at 1 3.0 2.75 2.0 1.50