This homework is for my plane survrying class please I need help 2 points 1. Thr

Question

This homework is for my plane survrying class please I need help

2 points 1. Three-wire leveling is a. Leveling procedure using three horizontal lines of cross hairs b. Leveling procedure using three rods c. Neither of the above 2 points 2. Correction for the Az in 3rd quadrant is: b. 180 2 points 3. The azimuth has a range of: a. 00-900 b. 0-400g rad c. 1000 6400mils 2 points 4. Find the azimuth which is equal to bearing N 95°W a. 75 b. 275° c. 95 d. None of the above 2 points 5. The Two -Peg test is a. A check for collimation error b. A check for indexing of horizontal circle c. To check the Level for vertical collimation error 2 points MONSTER 6. The result of computing Inverse problem is: a. Bearing and Distance b. Azimuth and Distance c, Hz and Distance

Explanation / Answer

1) B #You read your rod at each of the 3 horizontal lines, then averaging the readings to be sure you are getting the center line reading.

2) A #180 + alpha (Azim = tan-1(Dep/Lat) + 180)

3) A #Azimuth angles can thus range from 0 degrees (north) through 90 (east), 180 (south), 270 (west), and up to 360 (north again).

4) A #75 degrees

5) C #to check for collimation error (The test that we undertake in order to determine the amount of error and then eliminate it from our measurement is known as the two peg test)

6) B #Azimuth and distance (The inverse method computes the geographical distanceand azimuth between two given points)

7) C #automayically adjusts level to the line of sight (A angle automatic compensator used for a device requiring verticality or horizontality is disclosed)

8) B #geodetic coordinate system

9) B #Finding the elevation between two points

10) B #The line of sight is not parallel to the vertical axis(Is error comes when the line of sight does not coincide with the optical axis of theodilite)

11) A #Equator (Latitude is the angular distance of any point on Earth measured north or south of the equator in degrees, minutes and seconds.)

12) A #equator

13) B # Angle between the two tangents(The convergence of the meridians at any point of the earth ellipsoid is the angle ?s between the tangent to the meridian at the point and that tangent to the ellipsoid at the point that is parallel to the plane of some initial meridian)

14)   error =(5000/0.005) *2*10^-6 =2m

15) B # 177 degrees 15 minutes 42 seconds

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