1. | A fixed point of reference of known elevation is called ? | |
2. | The error in measured length due to incorrect holding of chain is ? | |
3. | The limiting length of the offset is............. when its perpendicular direction is set out by eye ? | |
4. | A reverse curve consists of ? | |
5. | In order to determine the natural features such as valleys, rivers, lakes etc., the surveying preferred is ? | |
6. | The vertical distance above or below the datum is called ? | |
7. | The index glass in an optical square is ? | |
8. | The rise and fall method for obtaining the reduced levels of points provides a check on ? | |
9. | An angle made by a survey line with the prolongation of the proceeding line, is known as ? | |
10. | The method of intersection in plane tabling is commonly used for ? | |