For other differential leveling surveys, what is the acceptable error of closure?

In differential leveling surveys, the acceptable error of closure is critical for determining the accuracy of the leveling process. The acceptable error of closure is defined as a numerical value (Y) that represents the maximum allowable deviation from the true elevation difference when leveling.

Choosing a value of Y = 0.10 indicates that for every vertical mile of leveling, the maximum allowable misclosure should not exceed 0.10 feet. This standard is consistent with industry practices and guidelines, ensuring that the survey data's reliability is maintained within a tolerable limit.

By adhering to this standard, surveyors can ensure that their work meets project specifications and regulatory requirements, which is fundamental in construction, land development, and various engineering projects. This level of accuracy helps ensure that any decisions made based on the survey data are made with integrity and precision.

In the context of the other options, values of Y equal to 0.05, 0.15, and 0.20 may not align with standard practices for the level of precision typically required in most differential leveling surveys, which is why they are not the correct choice.