At what decimal feet must the 2-peg test results be before the instrument needs calibration?

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Multiple Choice

At what decimal feet must the 2-peg test results be before the instrument needs calibration?

The 2-peg test checks an instrument’s accuracy by comparing the measured height difference between two known pegs to the true difference, using decimal feet as the unit. The instrument must be recalibrated if the result exceeds a very small tolerance to ensure measurements stay reliable in the field. That tolerance is 0.08 feet, which is about 0.96 inches—roughly within one inch. If the test result is within 0.08 ft, the instrument is considered acceptable without recalibration; if it’s larger, calibration is needed. The other values would permit larger errors and aren’t the standard threshold for this check.

The 2-peg test checks an instrument’s accuracy by comparing the measured height difference between two known pegs to the true difference, using decimal feet as the unit. The instrument must be recalibrated if the result exceeds a very small tolerance to ensure measurements stay reliable in the field. That tolerance is 0.08 feet, which is about 0.96 inches—roughly within one inch. If the test result is within 0.08 ft, the instrument is considered acceptable without recalibration; if it’s larger, calibration is needed. The other values would permit larger errors and aren’t the standard threshold for this check.

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