7. Which of the following is the first step in determining an unknown eelevation

Question

7. Which of the following is the first step in determining an unknown eelevation using a level and a philadelphia rod? a. the rod is placed at the background. b. the EDM instruments are placed at the unknown elevation. c. A transmitter-receiver unit is placed at teh closest bench mark available. d. the level is taken to the foresight 8. the counterclockwise measurement used to locate a line relative to a meridian that passes through the line's starting point is called a a. azimuth b. bearing c. longitude d. latitude 9. a level and a philadelphia rod are parts of a _________ system a. edm b. bm c. pob d.mod 10. in addition to measuring angels plotting a traverse requires you to a. estimate a degree of curve b. read a level c.calculate elevation d. mark off distances

Explanation / Answer

1. A Level is setup between two points, one whose elevation is known. 2. A backsight (BS) reading is taken on the known point to determine how far above it the LoS is. Adding the BS reading to the point elevation gives the elevation of the instrument (EI). 3. A foresight (FS) reading is taken on the unknown point to determine how far above it the LoS is. Subtracting the FS reading from the instrument elevation gives the point elevation. 4. The Level is moved to a position between B and the next point and the process repeated.

Related Questions

Navigate

• Browse (All)
• Browse 7
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.