1.1 Plane surveys are those for which the curvature of the earers (a) True D Fal

Question

1.1 Plane surveys are those for which the curvature of the earers (a) True D False (c) Both (a) and (b) (d) None of the above surface is taken ia 1.2 Geodetic surveys are those for which curvature of earth is taken into accoure (a) True (b) False (c) Both (a) and (b) (d) None of the above 1.3 A crew ran a level from a known monument with an elevation of 100.00 feet to a elevation on. It required two setups (4 rod readings). The calculatee was 112.50 feet. above the bottom of new monumet elevation to the new When they got back to the office, they noticed the 0.00 mark on the rod was as the rod (as shown below). What is the correct elevation of the peint? 0.05 (a) 112.30 (b) 112.40 (c) 112.70 (d) None of the above 1.4 sophisticated engineering works, tunnels, studies of metropolitan areas and earth crustal movements -order surveys are extremely accurate surveys used for military defense projects, (a) First (b) Second (c) Third (d) Both (a) and (b) is a temporary point whose elevation is determined during the process of 1.5 A leveling. (a) Turning Point (b) Bench Mark (c) Sea Level (d) Both (a) and (b)

Explanation / Answer

For question 1.1 and 1.2 it is worth mentioning that there are two broad types of survey classification based upon whether the curvature of earth is taken into account or not .

If the curvature of earth surface is taken into account then it is known as geodetic survey else it is known as plane surveying where the earths surface is assumed to be plane.

Hence option b is correct for question 1.1 and option A is correct for question 1.2

For question 1.3 it has been given that the rod was used 4 times and the final level was 112.5 ft however since the rod had measured more elevation but reported less so option c is correct that the elevation of new monument is 112.7 ft .

Question 1.4 third order surveys are more accurate

Question 1.5 A option A is correct ie turning point is a temporary point whose elevation is determined during levelling so that elevation of other point can be calculated by taking backsight to the turning point.

Question 1.6 A option D is correct as contour line is the imaginary line that connects points of equal elevations .

Question 1.7 option D is correct as HI is abbreviation used for height of instrument in surveying.

Question 1.8 total station measures vertical angles which are azimuth or under whole circle bearing and hence option A is correct.

Question 1.9 sum of interior angles of an n sided polygon is = 180*(n-2) = 180*(10-2)= 180*8= 1440 degree and hence option D is correct.

Question 1.10 rod is reading 3.8 which is the position of central hair and hence option C is correct.

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