Physics and applied science a surveyor meets in the field: light and EDM, temperature and tension effects on a tape, statics, hydrology basics and units.
What this subject area expects
Apply tape corrections for temperature, tension, sag and slope
Explain how an EDM measures distance and what limits its accuracy
Reason about refraction, curvature and their combined effect on levelling
Convert consistently between customary and SI units
Topics covered here
Tape corrections - temperature · Tape corrections - tension · Tape corrections - sag · Tape corrections - slope · Tape standardization · EDM principles · EDM error sources · Curvature and refraction · Instrument optics · Statics and forces · Hydrology and hydraulics · Units and conversions · Thermal expansion of materials
Question 1 of 40Basic sciences · Recall
A 100 ft steel tape standardized at 68 °F is used in the field at 95 °F to measure the distance between two existing monuments. Which statement correctly describes the temperature effect and the sign of the correction?