Surveying in Civil Engineering 2

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1. The smallest length that can be drawn on a map is
2. What is a sextant?
3. Which of the following conditions are to be fulfilled by survey lines for a good system of lines in a survey station?

(i) Survey stations must be mutually visible.
(ii) The lines must run through level ground as possible.
(iii) The main lines should from well-conditioned triangles.
(iv) The framework in survey lines must have one or two survey lines.

4. What does the Chainage in chain survey refers to?
5. In a topographic survey what are the imaginary lines used on the ground joining the points of equal elevation called?
6. Which type of levelling is the most precise method for determining elevations and one of the most commonly used my engineers?

If the mean temperature Tm in the field during measurement is 35kg and temperature during standardization of the tape To is 15kg, the measured length is 1000 and coefficient of thermal expansion is 12 x 10-6. What is the temperature correction of the tape?

8. Pick out the correct statement(s) from the following.
9. What is the essential condition to be fulfilled in orientation of plane table surveying when more than one instrument station is to be used.
10. Which rule assumes that the short lengths of boundary between the ordinates are parabolic arcs and is used when the boundary line departs considerably from the straight line?
11. Wing nuts are provided on ______
12. The process of turning the telescope in vertical plane through 180o about the trunnion axis in a theodolite is known as
13. If the length of a line measured with a 20m chain and incorrect length L’ of a chain is 20.1m and measured length l’ is 250m, then what is the ‘true length’ of the line?
14. Which type of survey is used in fixing of property lines, the calculation of land area, or the transfer of land property from one owner to another?
15. Which one of this is not an essential feature of magnetic compass?

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