1. The diaphragm of a stadia odolite is fitted with two additional

2. Keeping instrument height as 1.5 m, length of staff 4 m, slope of ground as 1 in 10, sight on down-slope, must be less than

3. If declination of needle is 10° W

4. The rise and fall method of reduction of levels, provides a check on

5. The line of sight is kept as high above ground surface as possible to minimise error in observed angles due to

6. The magnetic meridian at any point, is direction indicated by a freely suspended

7. If length of a transition curve to be introduced between a straight and a circular curve of radius 500 m is 90 m, maximum perpendicular offset for transition curve, is

8. The orthographical projection of a traverse leg upon reference meridian, is known as

9. Prolongation of chain line across an obstruction in chain surveying, is done by

10. The curvature of earth's surface, is taken into account only if extent of survey is more than