1. | A line joining some fixed points on the main survey lines, is called a ? | |
2. | A line joining the optical centre of the object glass and the centre of the eye piece, is known as ? | |
3. | A staff reading taken on a bench mark or a point of known elevation is called ? | |
4. | In route surveys, the most suitable method of contouring is ? | |
5. | A line normal to the plumb line at all points is known as ? | |
6. | The projection of a traverse line on a line perpendicular to the meridian is known as ? | |
7. | The angle by which the forward tangent deflects from the back tangent of a curve is called ? | |
8. | When the length of a chord is less than the peg interval, it is known ? | |
9. | The vertical distance between any two consecutive contours is called ? | |
10. | It is more convenient and gives better results while measuring horizontal distance.............. by stepping method ? | |