Surveying Key Terms: Geometry,
Instruments, and Mapping Exam
Questions + Verified Answers 100%
correct, Update 2026
A permanent marker with a known elevation used as a reference. -
correct answer ✅Benchmark
A reference surface from which elevations or coordinates are
measured. -
correct answer ✅Datum
A horizontal angle expressed in quadrant notation (N/S and E/W). -
correct answer ✅Bearing
A horizontal direction measured clockwise from north (0°-360°). -
correct answer ✅Azimuth
A series of connected lines used to determine positions of points. -
correct answer ✅Traverse
A plus rod reading on a known point used to compute HI. -
correct answer ✅Backsight (BS)
, Surveying Key Terms: Geometry,
Instruments, and Mapping Exam
Questions + Verified Answers 100%
correct, Update 2026
A minus rod reading taken on an unknown elevation point. -
correct answer ✅Foresight (FS)
A stable point used to transfer elevations during leveling. -
correct answer ✅Turning Point (TP)
Elevation of line of sight: HI = Elev + BS. -
correct answer ✅Height of Instrument (HI)
Determining elevations or elevation differences between points. -
correct answer ✅Leveling
A straight horizontal line from the instrument to the rod. -
correct answer ✅Line of Sight
A historic measuring tool, commonly 66 ft long. -
correct answer ✅Chain
A steel or fiberglass tape used for distance measurement. -
correct answer ✅Tape
Instruments, and Mapping Exam
Questions + Verified Answers 100%
correct, Update 2026
A permanent marker with a known elevation used as a reference. -
correct answer ✅Benchmark
A reference surface from which elevations or coordinates are
measured. -
correct answer ✅Datum
A horizontal angle expressed in quadrant notation (N/S and E/W). -
correct answer ✅Bearing
A horizontal direction measured clockwise from north (0°-360°). -
correct answer ✅Azimuth
A series of connected lines used to determine positions of points. -
correct answer ✅Traverse
A plus rod reading on a known point used to compute HI. -
correct answer ✅Backsight (BS)
, Surveying Key Terms: Geometry,
Instruments, and Mapping Exam
Questions + Verified Answers 100%
correct, Update 2026
A minus rod reading taken on an unknown elevation point. -
correct answer ✅Foresight (FS)
A stable point used to transfer elevations during leveling. -
correct answer ✅Turning Point (TP)
Elevation of line of sight: HI = Elev + BS. -
correct answer ✅Height of Instrument (HI)
Determining elevations or elevation differences between points. -
correct answer ✅Leveling
A straight horizontal line from the instrument to the rod. -
correct answer ✅Line of Sight
A historic measuring tool, commonly 66 ft long. -
correct answer ✅Chain
A steel or fiberglass tape used for distance measurement. -
correct answer ✅Tape
