A line level was run from BM1 to BM2, 8 km apart. The average backsight and foresight distances were 100m. At every turning point, the rod settles by 3cm. Determine the total error in the recorded elevation of BM2. a. 1.17 m b. 1.25 m c. 1.40 m d. 1.57 m

A line level was run from BM1 to BM2, 8 km apart. The average backsight and foresight distances were 100m. At every turning point, the rod settles by 3cm. Determine the total error in the recorded elevation of BM2. a. 1.17 m b. 1.25 m c. 1.40 m d. 1.57 m

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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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

A line level was run from BM1 to BM2, 8 km apart. The average backsight and foresight distances were
100m. At every turning point, the rod settles by 3cm. Determine the total error in the recorded elevation
of BM2.
a. 1.17 m
b. 1.25 m
c. 1.40 m
d. 1.57 m

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