1. Closed contours with higher value inside represents a

2. The curvature of earth is taken into consideration if limit of survey is:

3. The angle between two plane mirrors of optical square, is

4. Accidental or compensating errors of length L are proportional to

5. Planimeter is used for measuring

6. While measuring a chain line between two stations intervened by a raised ground

7. Surveys which are carried out to depict mountains, rivers, water bodies, wooded areas and or cultural details, are known as

8. A plain scale is used to read

9. An obstacle which obstructs both chaining and ranging may be

10. If h is difference in height between end points of a chain of length l, required slope correction is