LSIT Measurement Technology — Questions and Answers
Question 1: What is EDM?
- Technology using electromagnetic waves to measure distances accurately (Correct answer)
- GPS receiver type
- Angle-only method
- Software program
Correct answer: Technology using electromagnetic waves to measure distances accurately
Electromagnetic waves determine distance between points.
Question 2: How are horizontal distances from slope distances calculated?
- Multiply slope distance by cosine of vertical angle (Correct answer)
- Add elevation difference
- Divide by vertical angle
- Subtract slope angle
Correct answer: Multiply slope distance by cosine of vertical angle
Trigonometry converts slope to horizontal measurement.
Question 3: What is a total station?
- Instrument combining EDM, angle measurement, and computing (Correct answer)
- Radio station
- Weather station
- Fuel station
Correct answer: Instrument combining EDM, angle measurement, and computing
This single device does multiple measurement tasks.
Question 4: What is GPS/GNSS surveying?
- Using satellite signals for precise 3D positions on earth (Correct answer)
- Compass navigation
- Ground-based radio
- Aerial photography
Correct answer: Using satellite signals for precise 3D positions on earth
Satellites provide precise positioning from space.
Question 5: What is differential leveling?
- Determining elevation differences using backsight/foresight readings (Correct answer)
- Measuring horizontal distances
- Property boundaries
- Soil testing
Correct answer: Determining elevation differences using backsight/foresight readings
This technique finds height differences between points.
Question 6: What is photogrammetry?
- Making measurements from photographs, especially aerial, for maps and 3D models (Correct answer)
- Taking team photos
- Photographing documents
- Equipment ID system
Correct answer: Making measurements from photographs, especially aerial, for maps and 3D models
Photographs become measurements and maps.
LSIT Measurement Technology
What is EDM?