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Field Measurements

by: Roma Heaney

Field Measurements CE 115

Roma Heaney

GPA 3.6

Raymond McGinnis

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About this Document

Raymond McGinnis
Class Notes
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Popular in Civil Engineering

This 2 page Class Notes was uploaded by Roma Heaney on Monday October 5, 2015. The Class Notes belongs to CE 115 at Christian Brothers University taught by Raymond McGinnis in Fall. Since its upload, it has received 10 views. For similar materials see /class/219437/ce-115-christian-brothers-university in Civil Engineering at Christian Brothers University.


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Date Created: 10/05/15
CE 115 FIELD MEASUREMENTS Theory of Measurements and Errors SG 3 Name Please complete the following problems in pencil on engineering paper Thought of the day quotRemove not the ancient landmark which thy fathers have setquot 1 2 Proverbs 2228 The elevation of a certain benchmark is to be determined in the field Repeated leveling circuits are completed to determine this elevation The results are 30525 30521 30523 30582 and 305 22 Compute the most probable elevation standard error and standard error of the mean for these elevations Hint One or more of the elevations may be considered to be blunders and should not be included in the calculations Explain the significance of each computed value as it relates to statistical theory Show all of your work by filling out the following table Using the data in problem 1 determine the range within which measurements should fall a 50 of the time and b 90 of the time Compute the percentage of values that actually fit within these ranges Specifications for measuring angles of a l2sided polygon limit the total angular misclosure to 30 How accurately must each angle be measured to meet these specifications 4 The length of a side ofa traverse is measured in three sections The length of each section is determined by a different surveying crew using different steel tapes Each party measures their section multiple times and records the following lengths MPVs and standard deviations Party 1 382965m 0020m Party 2 495030m 0025m Party 3 526520m 0028m Determine the total length and the standard deviation in the total length for the side of the traverse


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